Hey, I have to (let) restore a Honda CB600 PC34 Carb... mainly, the rest can I do. But it is totally weak at around 1400 to 1800 rpm, the sound there is not clean onto that, did mean a mechanic. Do you think, such can be a calibration thing? The pre-owner said it was cleaned a while ago, but she was lying about some problems. And I know... internal are as well calibration possibilities, but this should be expensive here...
One thing i learned. Before you connect all four gauges to different carbs you should connect all gauges to one carb to make sure they are reading the same vacuume. they can be off and you'll have to compensate on your adjuster.
well said. no good trying to sync your carbs with gauges that are not calibrated. maybe thats why the mercury tubes read differnt. thats why number 4 was out on both sets. those knurled nuts he was turning on the gauges are dampers to dampen the deflection of the pointers. maybe it would have been better if he put the carbs out of sync then brought them back into sync and done proper demo.
Exactly. I have a four-into-one manifold that I attach a vacuum source to and can calibrate all four at the same time. This is only for the dial gauges.
I know you posted this a while ago, but I hope you see this message anyways. Recently I bought my first street bike. I've only ever had dirt bikes before now, so I've never been familiar with anything but one cylinder. I noticed very bad gas mileage after riding my bike around for a couple of weeks. I took off the carb rack, cleaned everything out, and adjusted the throttle plates. I had no idea what syncing the carbs were until now, after I've already put everything back together. It's such a relief that I did something right, granted without the perfect tools, and adjusted something for the better. Now in hindsight, because I actually know what syncing is, thanks to you, I'm so glad that I adjusted those plates, because they were MILES off a proper setting. Thanks you again so much.
I second Kneedown on this. I like seeing a pro doing it right showing detail for people. I spent 10 years as a diesel tech before I went into bridge welding so for working on my bikes I search youtube to get info. Nice to find people giving real info not a cletus hack job. Keep up the good work my man, and keep the bike vertical.
I just picked up a guage set from a guy retiring from boat motor wrenching . It's got about 6 different sets of vac needles all labeled 25 bucks . The carbs you rebuilt for my 78 cb750ss are doing great . Awesome job ! . You said I should sinc them . 2k miles later I will thanks to this video . It's almost riding weather bro , let's GO. Thanks again .
What a find! Yes its from 2016 but this is the cool thing about YT. I've been working on bikes for 30 years now and this is, by far, the clearest explanation yet. I've got this to do, just rebuilt the carbies on my 1985 GS850, she starts, idles with a fart and a pop but isn't pulling much above 3000rpm. Carbs were bench synced only so I'd expect nothing less than dog rough! You're a gold mine, if only to confirm what we know (or thought we did!) Love you man.
I’ve been using CARBSTIX Mercury gauges for many many years and I love ‘em. BTW on these Japanese bikes those screws that appear to be Phillips head screws are NOT! They are JIS screws, Japanese Industrial Standard which is why everyone strips them out using Phillips head screwdrivers. Excellent work BTW and I believe I’m going to get a set of those sync gauges, you’ve convinced my 60 year old self!🤘🏼
Cody I bought a 1980 cb900 it has a gsxr750 engine fitted its been sitting in a shed since 2001 carbon were full of jelly your video's are great all I need to know to get jobs done never had any trouble with cars till I bought this all the best keep making great informative video's
Definitely not wasting my time. You are very thorough in your explanation. Much better than any video I've seen so far. But got only question. Shouldn't the valves be adjusted before this procedure? Brother keep up the great videos.
Best video I've ever seen on teaching someone how to sync carbs! Put out an entire series of videos! Your direct, to the point and don't mess around with "so now I'm gonna loosen this screw...that's just not coming off is it" stuff. Thank you for such a professionally done video!!!!
If you calibrate the gauges to each other they will have more accuracy. All you need is a syringe and 4 port manifold to create a common vacuum, then use the calibration screws on the affected gauge. Best to pull the vacuum to the normal operating value during cal-in your case around 20 cm/hg. The cheap Emgo gauges have a cal screw under the glass. If the gauges don't have adjustments then note which are off or mark the bezel for error correction. You also need to dial or damp more bounce out of all the gauges.
if you calibrate them on a monday - you will have 6 more different calibrations by Sunday, if you calibrate them at 1000 revs they will be out on 1500 revs - if you use seperate dial gauges you will never know.....but in truth this isnt about accuracy - it is only about getting them into the working zone.....at best.... but lol on the damping - you tell me what you want them to read and i will dial in the damping and all unequally on every gauge.......
The best I have found over the years for dampening the gauges are iv drip emitters from the medical industry that go on the vacuum lines Between them and the valves on the gauges 0 bounce
Great Video. I have a 1982 v45 Magna, since 1984. I put it away in 1990 and just started to restore it again. Carbs seized and Shifter rod seized. So I tore it apart. Had the motor sitting there studying it for a year. If you ever seen the carbs for a V45 it would scare you. Looking at you video inspired me. I remember the nighthawks, unfortunately Magnas smoked them. Scared my brother in-law back then. Well Great Video Thanks. I will Show a video of the magna when I start that. Oh, in 1982 the Magna was way ahead of it time, Anti-Dive, Electric Fuel Pump, Water Cooled, Shaft Drive, Hydrolic Clutch and Brake, And probably the best bike ever made in its time. And So fast. Great Video, Your Awsome
Mate, absolutely brilliant video. The comparison between vacuum and mercury was interesting, and a full description of why and how was invaluable, I am now a subscriber.
Fantastic info. You saved me from buying a synchro kit for a recently purchased 1985 VF1000. After cleaning the carbs, everything ran better than Imagined.
I love this video. You went over how the carbs work, how to fix it, and what are things to know. How you explain things, in order and what to watch out for is awesome. You answered questions i didn't even know i had, and things like the base carb, never knew existed. But that makes sense. Awesome video, Instant sub. Keep doing what your doing.
I bought a 73 cb750 that had been parked for 43 years. Oil down the cylinders, carb clean, oil change, new plugs, air filter, cleaned points, got it running. It ran poorly, so I removed the carbs again and found a drill bit that fit nicely under one carb slide that I knew was working well. Adjusted the other 3 to match. Voila! I was riding! But a little sputter just off idle, where I do most of my riding bothered me. I built a manometer. Got them adjusted really close to the same. Now it actually runs a little worse. I'm buying some gauges today (quality used ones) and gonna try it again.
Awesome video. My english isn't that good but I understood nearly everything. If your not already an instructor you would be one of the best instructor ever. I wouldn't hesitate to take lessons. I immediatly subscribed to your channel. Thanks!
You explained the procedure well and I like that you showed the difference between both style tools to check the carbs. Everything was clear to see in the video. Thumbs up
what I learned how you easily set the sync without gauges is: remove the carb-bay from your bike take the smallest drill you can (one that is not grimy nor with burrs) get mark one side of the shaft with a Edding(or whatever permanent marker you can get) for repeatability of the position for the next step: BE GENTLE! using force might damage your carb fataly open the butterfly by turning the RPM screw in, so that the drill will juuust fit between the "Master"-butterfly and the carb-body with the mark facing up (make notes for the turns on the RPM screw) repeat with the "Slave"-butterflies so that the drill will juuust fit underneath those close the RPM screw back to normal by screwing it out insert the carb back into your bike and take a ride to warm up the engine adjust the idle to spec RPM
Best instructional video ever, well presented, no unnecessary talk, great style , fantastic information. Told me everything I needed to know. Keep it up!
This is the first vid of yours I've watched. It's given me a start on what I should be looking at with my G1 6R Ninja dying on me. Thanks for sharing your expertise. It's invaluable.
Depending on how the carb vacuum layout is you can have 2 banks of 2 carbs instead of 1 master carb. Keihin FCR's are like this. Carb 1and2 are tied together and 3and4 are ties to gether. With port linking the 2 banks of 2 together. You make 1&2 the same, 3 & 4 the same then bring both pairs together with the center spring screw.
I drop a stupid port screw and washer down into the middle of the engine /EVERY/ time I do this. They are such a PITA to get back!!! New subscriber here and wanted to say you did a very nice job with this video. I noticed you have pods. I have a 93 CB750 and I know the reputation Nighthawks have running with pods. It demonstrates to me you really know what you're doing. Keep up the good work - really happy I stumbled across your channel.
Hands down the most informative and professionally made motorcycle mechanics videos on the web. You def need your own tv show. Keep up the good work, im learning more from you than a combination of multiple other people combined. Great work bro, keep em comin.
Great editing Cody! The reason for the difference in the vacuum vs. mercury is the vac gauges need "sync'd" to each other before use. I do it every time I use them. I can share the link to my video on doing that if you'd like. Also note, the Mercury gauges need "sync'd" too. Its common the many folks (not looking like you do) store the gauges on their side and little by little small amounts of mercury (or the later used blue fluid) separate of leak out and cause you to think the carb are out of sync. The big point here is your carb sync is only as good as the gauge sync. Keep Wrenching pal...H2W
Thanks for making this video. I’ve learned more in this video in regards to carb adjustment and different types of gauges than I have in any other video on here.
Good clear information thats why i subscribed . What would cause number two carby to flood cylinder, even when engine is running fuel is leaking out exhaust manifold . Fuel is also getting into the engine oil and raising the oil level within 5-10 minutes running time. I have checked floats on all 4 carbs ( multiple times ) new jets new inlet rubbers new hose clamps carb bodies cleaned ( multiple times ) . Its a 1981 gsx 1100
Just wow, I’m new to bike and have made a silly mistake with a bad manometer, hopefully my bike will survive the water manometer it sucked it in! YUP! Any way draining the oil and pulling the plugs for a few spins and hopefully I’ll get away with it !!!!! I’ve watched lots of online videos but NONE come near the quality and content of this one here. I have just subscribed and this will be my come to place to learn more IF my bike has survived.
I know I’m years behind on the party but I just want to let you know this is a great video. I can’t find anything that says my ‘77 Honda CB550F has a specific carburetor for which I’m supposed to set the rest. I noticed yours was carb number two. Do you know if there is a specific carb that I’m supposed to set first? It looks like all of my carbs have an adjustment screw on them
So great video thanks. Now I may have missed this but shouldn’t you disconnect each of the carb linkages prior to doing the adjustment to make each carb independent. Just asking
Lots of good info here man. I've come from 4wheel land where a two wheel friend wants me to rebuild his carbs and get his bike running again and I'm just going and researching everything I may need to do. So thank you. 👍🏻
Awesome video! Watching this video gave me the confidence to sync my 1981 cb750k. I too have the mercury gauges, and I wondered which gauges were better. You answered that question, and more. Thanks!!!
Cody thank Yoxford your video's they have helped me sort my bike out in stages now getting it ready for mot just wiring and odds and sods to do you demonstration on the balance gauges has given me the know how to set them carbs up to get them close I used a sewing needle to get them close as it was really rough to start with and wouldn't idle now it idles to place gauges on to balance keep the videos coming regards mark
love your vids mate, it looks like the old school mercury sync gauge is more accurate than the new gauges. As mercury is a substrate that can't be altered, it's automatically in calibration, and perhaps the gauged calibration setup has gauges that could possibly be out of calibration? But as you said, you can get the synchronisation in the ball park with close tolerances.
Just got my ‘95 GL1500 road ready, and will start on the ‘80 KZ1300 with 3600 original miles... yes only 3600! Rebuilt the carbs, but need to balance them now..
G'day from Australia Beautiful non-bullshit video, well done. Only thing I'd have added is an explanation about the base carb being directly connected to the throttle cable and is where the the idle speed is adjusted. Great stuff, thanks
Hi there , thank you for sharing your knowledge about carb synchronizing, can you please do a video on synchronizing carbs on a GL 1500 Goldwing . Thanks
thanks Coddy,for your involvement in helping us with our bike,my question is did you ever do this on an old GoldWing like my GL1200 1984?? i need guidance.Thanks gervais
hey man, just wanted to let you know that you present information is great. straight to the point and has warnings. my view was just a random click, but i will be viewing more videos and subing to your channel. keep up the good work.
Good video 👍 where did you get the extensions for your pod air filters and I'm assuming it's a better setup than just putting the pods right on the carbs. I have a 1982 CB 750. Thanks
I measured how far I wanted the dimensions and size of the tubes. Ordered them pre-cut, raw aluminum from online metal place. Polished them myself and installed.
Have you looked at or tried the "Morgan CarbTune" meters? I have one (a twin Gage, but they make a 4 that I should have gotten) and I love it. Inexpensive and accurate. Your bike doesn't have a "set zone" for the vacuum? On my Yamaha, it's 24Hg as the base to be adjusted too. Looks like your Honda is about the same.
The manometer is fine with higher revs, you just have to be careful not to make abrupt throttle changes, increase and decrease. You want slow and steady to avoid vacuum spikes. And you should make a point of throttling above idle, the sync can change.
Hi MD, happens to me that Carb synchronization for one of the Carbs was imposible to tune due to the fact that the admission valve for that particular cylinder was not closing completely creating a leak, after repairing the valve seat everything went fine. so very important that valve cam head works perfectly fine, otherwise as you said you'll chase that adjustment for months with no good results.
I liked your carb sync comparison very mutch I would like to know your thoughts on the digital carb sync gages I Recently bought a set and so far am happy with their results a comparison to a mercury set would be an interesting video what do you say ?
Correct me if I didn't understand correctly, but that fourth dial gauge indicated that there was a lack of vacuum, so you increased the vacuum at the carb. But then when measuring with the mercury gauges, they indicated that vacuum was now too high on cylinder 4, meaning the bike was actually fine to begin with and that fourth dial gauge just gave a false reading. To me that's reason enough not to trust the gauges, or at least find a way to calibrate them.
Great, learning heaps, my only feedback is the conclusion that Merc was better than the gauges based on what we saw; adjustment by gauge, then throttle butterfly seating, then went straight to merc. I think that it would have been logical to go back to gauge for a reading before the conclusion. This may have been done off video, my contribution is simply about trouble shooting technique for us, not a doubt as to merc being better or his competence.
That's exactly what I was thinking, what I saw was when he had the dials hooked up he had to adjust the #4 needle up , he also mentioned at that time the bike started sounding better and when he hooked up the mercury sticks he had to adjust the #4 level back down but didn't mention anything about how the bike sounded. So in all actuality it doesn't look like he changed anything , just put it right back to where it was at the beginning, and he also didn't prove his theory on how more accurate mercury is over the dial gauges by hooking back up the dials and showing any difference before ending the video.
Excellent video, it should be watched by all who fear multiple carb setups. It would be great if those gauges had some sort of internal damper to stop the oscillations.
Great tips, Cody! I am wondering, will the 4 gauge tool work on a dual carb motorcycle? Can you leave two gauges disconnected or is there anything that has to be done on the 4 gauge tool before it's used on a dual carb machine?
Hi, I am really happy you made this video! And I understand that you have the Knowlege!! I Have just started a project building a Junior Drag Bike for my son, and are just now working with the Carburettors to get them to work. This is really helpfull!!
Carb sync is a means by which variations in each cylinders draw / compression can be adjusted through each butterfly so that the result is evenness in terms of draw - fuel delivery.
great video bud cheers been sorting my own bikes for years never too old to learn new things picked up a tip with the snapping back the throttles simple trick but makes so much sence ;-) Respect fella ride safe
Correct about everything. Only difference is that for some reason my baby varadero required 30mm less vacuum on the rear cylinder.... Manual says it so I'll do it.
►► Here is my step by step Twin Carb Cleaning tutorial - www.themotorcyclemd.com/inline-four-product-options
Hey, I have to (let) restore a Honda CB600 PC34 Carb... mainly, the rest can I do.
But it is totally weak at around 1400 to 1800 rpm, the sound there is not clean onto that, did mean a mechanic.
Do you think, such can be a calibration thing?
The pre-owner said it was cleaned a while ago, but she was lying about some problems. And I know... internal are as well calibration possibilities, but this should be expensive here...
One thing i learned. Before you connect all four gauges to different carbs you should connect all gauges to one carb to make sure they are reading the same vacuume. they can be off and you'll have to compensate on your adjuster.
Legend
well said. no good trying to sync your carbs with gauges that are not calibrated. maybe thats why the mercury tubes read differnt. thats why number 4 was out on both sets. those knurled nuts he was turning on the gauges are dampers to dampen the deflection of the pointers. maybe it would have been better if he put the carbs out of sync then brought them back into sync and done proper demo.
Exactly. I have a four-into-one manifold that I attach a vacuum source to and can calibrate all four at the same time. This is only for the dial gauges.
That's a great idea, thanks for sharing 👌
I sure like this kid... He's as thorough as it gets. Once you see a video of his, you rarely have questions.
This video taught me more about carb syn in three minutes than hours of other videos. Thank you
I know you posted this a while ago, but I hope you see this message anyways.
Recently I bought my first street bike. I've only ever had dirt bikes before now, so I've never been familiar with anything but one cylinder. I noticed very bad gas mileage after riding my bike around for a couple of weeks. I took off the carb rack, cleaned everything out, and adjusted the throttle plates. I had no idea what syncing the carbs were until now, after I've already put everything back together. It's such a relief that I did something right, granted without the perfect tools, and adjusted something for the better. Now in hindsight, because I actually know what syncing is, thanks to you, I'm so glad that I adjusted those plates, because they were MILES off a proper setting.
Thanks you again so much.
Probably the best tutorial on CV carb synching on TH-cam. Top man.
+coppermine64 What a generous comment! Thanks brother🤙🤙
I'm working on a Yamaha 50HP outboard engine with 4 carbs. This video really helps more than motorcycles! Thank you.
Your not wasting my time with the extra information its great!.
Like the way you go about your work. "I like to get em perfect".
Kneedown Glad you enjoy the content brother!
I second Kneedown on this. I like seeing a pro doing it right showing detail for people. I spent 10 years as a diesel tech before I went into bridge welding so for working on my bikes I search youtube to get info. Nice to find people giving real info not a cletus hack job. Keep up the good work my man, and keep the bike vertical.
Nick Warner Thank you for the encouragement brother! Same to you!
Kneedown I
Agreed! Trying to find information on carb'd cars and I'm here listening to these guys cause they're explaining it right.
I just picked up a guage set from a guy retiring from boat motor wrenching . It's got about 6 different sets of vac needles all labeled 25 bucks . The carbs you rebuilt for my 78 cb750ss are doing great . Awesome job ! . You said I should sinc them . 2k miles later I will thanks to this video . It's almost riding weather bro , let's GO. Thanks again .
What a find! Yes its from 2016 but this is the cool thing about YT. I've been working on bikes for 30 years now and this is, by far, the clearest explanation yet. I've got this to do, just rebuilt the carbies on my 1985 GS850, she starts, idles with a fart and a pop but isn't pulling much above 3000rpm. Carbs were bench synced only so I'd expect nothing less than dog rough! You're a gold mine, if only to confirm what we know (or thought we did!) Love you man.
I’ve been using CARBSTIX Mercury gauges for many many years and I love ‘em. BTW on these Japanese bikes those screws that appear to be Phillips head screws are NOT! They are JIS screws, Japanese Industrial Standard which is why everyone strips them out using Phillips head screwdrivers. Excellent work BTW and I believe I’m going to get a set of those sync gauges, you’ve convinced my 60 year old self!🤘🏼
Cody I bought a 1980 cb900 it has a gsxr750 engine fitted its been sitting in a shed since 2001 carbon were full of jelly your video's are great all I need to know to get jobs done never had any trouble with cars till I bought this all the best keep making great informative video's
Definitely not wasting my time. You are very thorough in your explanation. Much better than any video I've seen so far. But got only question. Shouldn't the valves be adjusted before this procedure? Brother keep up the great videos.
Best video I've ever seen on teaching someone how to sync carbs! Put out an entire series of videos! Your direct, to the point and don't mess around with "so now I'm gonna loosen this screw...that's just not coming off is it" stuff. Thank you for such a professionally done video!!!!
If you calibrate the gauges to each other they will have more accuracy. All you need is a syringe and 4 port manifold to create a common vacuum, then use the calibration screws on the affected gauge. Best to pull the vacuum to the normal operating value during cal-in your case around 20 cm/hg. The cheap Emgo gauges have a cal screw under the glass. If the gauges don't have adjustments then note which are off or mark the bezel for error correction. You also need to dial or damp more bounce out of all the gauges.
Gotta sync my carb sync gauges?
if you calibrate them on a monday - you will have 6 more different calibrations by Sunday, if you calibrate them at 1000 revs they will be out on 1500 revs - if you use seperate dial gauges you will never know.....but in truth this isnt about accuracy - it is only about getting them into the working zone.....at best.... but lol on the damping - you tell me what you want them to read and i will dial in the damping and all unequally on every gauge.......
The best I have found over the years for dampening the gauges are iv drip emitters from the medical industry that go on the vacuum lines
Between them and the valves on the gauges 0 bounce
Great Video. I have a 1982 v45 Magna, since 1984. I put it away in 1990 and just started to restore it again. Carbs seized and Shifter rod seized. So I tore it apart. Had the motor sitting there studying it for a year. If you ever seen the carbs for a V45 it would scare you. Looking at you video inspired me. I remember the nighthawks, unfortunately Magnas smoked them. Scared my brother in-law back then. Well Great Video Thanks. I will Show a video of the magna when I start that. Oh, in 1982 the Magna was way ahead of it time, Anti-Dive, Electric Fuel Pump, Water Cooled, Shaft Drive, Hydrolic Clutch and Brake, And probably the best bike ever made in its time. And So fast. Great Video, Your Awsome
Mate, absolutely brilliant video. The comparison between vacuum and mercury was interesting, and a full description of why and how was invaluable, I am now a subscriber.
one of the most simple and easiest to understand explanation of syncing carbs. Thanks a lot mate you've helped me out a lot
Fantastic info. You saved me from buying a synchro kit for a recently purchased 1985 VF1000. After cleaning the carbs, everything ran better than Imagined.
I love this video. You went over how the carbs work, how to fix it, and what are things to know.
How you explain things, in order and what to watch out for is awesome.
You answered questions i didn't even know i had, and things like the base carb, never knew existed. But that makes sense.
Awesome video, Instant sub. Keep doing what your doing.
Thanks man! 🤙🤙
I bought a 73 cb750 that had been parked for 43 years. Oil down the cylinders, carb clean, oil change, new plugs, air filter, cleaned points, got it running. It ran poorly, so I removed the carbs again and found a drill bit that fit nicely under one carb slide that I knew was working well. Adjusted the other 3 to match. Voila! I was riding! But a little sputter just off idle, where I do most of my riding bothered me. I built a manometer. Got them adjusted really close to the same. Now it actually runs a little worse. I'm buying some gauges today (quality used ones) and gonna try it again.
This guy knows his stuff. I've always used the mercury gauges. he gets it right.
Awesome video. My english isn't that good but I understood nearly everything. If your not already an instructor you would be one of the best instructor ever. I wouldn't hesitate to take lessons. I immediatly subscribed to your channel. Thanks!
You are a life saver. I am restoring a mid 90's Ducati and was looking everywhere to find where to attach my synchronizer!
You explained the procedure well and I like that you showed the difference between both style tools to check the carbs. Everything was clear to see in the video. Thumbs up
Definitely useful info here, short and sweet too, carb balancing has been a mystery to me for years but after watching this it makes total sense
what I learned how you easily set the sync without gauges is:
remove the carb-bay from your bike
take the smallest drill you can (one that is not grimy nor with burrs) get mark one side of the shaft with a Edding(or whatever permanent marker you can get) for repeatability of the position
for the next step: BE GENTLE! using force might damage your carb fataly
open the butterfly by turning the RPM screw in, so that the drill will juuust fit between the "Master"-butterfly and the carb-body with the mark facing up (make notes for the turns on the RPM screw)
repeat with the "Slave"-butterflies so that the drill will juuust fit underneath those
close the RPM screw back to normal by screwing it out
insert the carb back into your bike and take a ride to warm up the engine
adjust the idle to spec RPM
Best instructional video ever, well presented, no unnecessary talk, great style , fantastic information. Told me everything I needed to know. Keep it up!
+Ken Alexander Thanks for the feedback Ken! 🤙🤙
You have a real easy way about you which is thorough and complete. Keep up the good videos.
This is the first vid of yours I've watched. It's given me a start on what I should be looking at with my G1 6R Ninja dying on me.
Thanks for sharing your expertise. It's invaluable.
+arebrec Hope it helps brother! Ride safe thank you for the feed back!
Depending on how the carb vacuum layout is you can have 2 banks of 2 carbs instead of 1 master carb. Keihin FCR's are like this. Carb 1and2 are tied together and 3and4 are ties to gether. With port linking the 2 banks of 2 together. You make 1&2 the same, 3 & 4 the same then bring both pairs together with the center spring screw.
I drop a stupid port screw and washer down into the middle of the engine /EVERY/ time I do this. They are such a PITA to get back!!!
New subscriber here and wanted to say you did a very nice job with this video. I noticed you have pods. I have a 93 CB750 and I know the reputation Nighthawks have running with pods. It demonstrates to me you really know what you're doing. Keep up the good work - really happy I stumbled across your channel.
Great video. I guess we all have things we hate doing, this has always been one of mine, carb sync and spoking a wheel.
Somehow i understand you better than most youtubers . Very descriptive love the vid
dude. amazing video. totally understood everything the first time youwent over it and was able to sync up the carbs on my 1993 nigthawk
Hands down the most informative and professionally made motorcycle mechanics videos on the web. You def need your own tv show. Keep up the good work, im learning more from you than a combination of multiple other people combined. Great work bro, keep em comin.
this guy is like a service manual for me. best information and tips
Great editing Cody! The reason for the difference in the vacuum vs. mercury is the vac gauges need "sync'd" to each other before use. I do it every time I use them. I can share the link to my video on doing that if you'd like. Also note, the Mercury gauges need "sync'd" too. Its common the many folks (not looking like you do) store the gauges on their side and little by little small amounts of mercury (or the later used blue fluid) separate of leak out and cause you to think the carb are out of sync. The big point here is your carb sync is only as good as the gauge sync. Keep Wrenching pal...H2W
Wow hands down the best video on carb syncing. I totally get it now. Took the fear out of this mystery subject. Love the channel!
Thanks for making this video. I’ve learned more in this video in regards to carb adjustment and different types of gauges than I have in any other video on here.
I love this guy he explains everything so well. Thank you
This is exactly what I have been looking for. Even better is that it's the same bike that I've defiled for my own project.
Great Video! Still very handy in 2023! Just bought a 2004 Kawasaki Concours 1000 and needed this info!
Good clear information thats why i subscribed . What would cause number two carby to flood cylinder, even when engine is running fuel is leaking out exhaust manifold . Fuel is also getting into the engine oil and raising the oil level within 5-10 minutes running time. I have checked floats on all 4 carbs ( multiple times ) new jets new inlet rubbers new hose clamps carb bodies cleaned ( multiple times ) . Its a 1981 gsx 1100
This guy crammed about 3 hours worth of info into 14 min only focusing on important points and good insight on common misconceptions. 👍
Just wow, I’m new to bike and have made a silly mistake with a bad manometer, hopefully my bike will survive the water manometer it sucked it in!
YUP!
Any way draining the oil and pulling the plugs for a few spins and hopefully I’ll get away with it !!!!!
I’ve watched lots of online videos but NONE come near the quality and content of this one here.
I have just subscribed and this will be my come to place to learn more IF my bike has survived.
You guys explaining things like a teacher , perfect, thanks a lot buddy.
This is by far The Best Video For Carb Sync!
Thanks a lot!
I know I’m years behind on the party but I just want to let you know this is a great video. I can’t find anything that says my ‘77 Honda CB550F has a specific carburetor for which I’m supposed to set the rest. I noticed yours was carb number two. Do you know if there is a specific carb that I’m supposed to set first? It looks like all of my carbs have an adjustment screw on them
So great video thanks. Now I may have missed this but shouldn’t you disconnect each of the carb linkages prior to doing the adjustment to make each carb independent. Just asking
Except tutorial , I’ll be doing mine today & you just took any worry out of it. Having never done this on a bike before.👍🇨🇦
Marvelous level of detail - thanks!
Love the video MC MD. The clear no nonsense step by step tutorial is great, really makes it seem not so intimidating.
Best video I’ve seen on carb syncing. Thanks
Lots of good info here man. I've come from 4wheel land where a two wheel friend wants me to rebuild his carbs and get his bike running again and I'm just going and researching everything I may need to do. So thank you. 👍🏻
Awesome video! Watching this video gave me the confidence to sync my 1981 cb750k. I too have the mercury gauges, and I wondered which gauges were better. You answered that question, and more. Thanks!!!
Cody thank Yoxford your video's they have helped me sort my bike out in stages now getting it ready for mot just wiring and odds and sods to do you demonstration on the balance gauges has given me the know how to set them carbs up to get them close I used a sewing needle to get them close as it was really rough to start with and wouldn't idle now it idles to place gauges on to balance keep the videos coming regards mark
Dang, just found the channel and subscribed, but looks like I'm about 7 yrs too late. Great video!
Welcome!
love your vids mate, it looks like the old school mercury sync gauge is more accurate than the new gauges. As mercury is a substrate that can't be altered, it's automatically in calibration, and perhaps the gauged calibration setup has gauges that could possibly be out of calibration? But as you said, you can get the synchronisation in the ball park with close tolerances.
Just got my ‘95 GL1500 road ready, and will start on the ‘80 KZ1300 with 3600 original miles... yes only 3600! Rebuilt the carbs, but need to balance them now..
G'day from Australia
Beautiful non-bullshit video, well done. Only thing I'd have added is an explanation about the base carb being directly connected to the throttle cable and is where the the idle speed is adjusted. Great stuff, thanks
Brilliant video mate. Would have been nice to see what happens when the other adjustment screws weee moved. Some great points though 👍🏻
Thank you! Your videos save me a truck load of money and frustration.
Hi there , thank you for sharing your knowledge about carb synchronizing, can you please do a video on synchronizing carbs on a GL 1500 Goldwing . Thanks
thanks Coddy,for your involvement in helping us with our bike,my question is did you ever do this on an old GoldWing like my GL1200 1984?? i need guidance.Thanks gervais
Your videos are amazing ! Thanks for what you do and being on point without any carry on , love ya work mate ! Learning lots from your videos.
Excellent explanation and tutorial. Could not be more complete. Congratulatons!
Dude thank you so much for sharing this . I finally got my bike running the way it’s supposed to be than you thank you 🙏
You are very welcome brother!! Glad you where able to use the content!
Your mechanic skills are fantastic, but your teaching skills are beyond excellent. Keep up the great work!!!
Great production value and teaching. I'm watching a bunch of your videos right now and learning so much!
hey man,
just wanted to let you know that you present information is great. straight to the point and has warnings. my view was just a random click, but i will be viewing more videos and subing to your channel. keep up the good work.
You sound so knowing what you do you get yourself a follower
Absolutely superb demonstration of spot-on, detailed, and pertinent carburetor synch process. ++Awesome++
Good video 👍 where did you get the extensions for your pod air filters and I'm assuming it's a better setup than just putting the pods right on the carbs. I have a 1982 CB 750. Thanks
I measured how far I wanted the dimensions and size of the tubes. Ordered them pre-cut, raw aluminum from online metal place. Polished them myself and installed.
Thanks man. Appreciate the info 👍
Have you looked at or tried the "Morgan CarbTune" meters? I have one (a twin Gage, but they make a 4 that I should have gotten) and I love it. Inexpensive and accurate. Your bike doesn't have a "set zone" for the vacuum? On my Yamaha, it's 24Hg as the base to be adjusted too. Looks like your Honda is about the same.
Thanks man, learned about this in school but needed a refresher, gotta sync 3 carbs on a Honda outboard
You can still use the vacuum to get your pilot air screws to a good baseline or as a sanity check if you're investigating a rough running engine.
Yep, some old dudes from yesteryear used to sync with a piece of tubing by ear and good at it too
The manometer is fine with higher revs, you just have to be careful not to make abrupt throttle changes, increase and decrease. You want slow and steady to avoid vacuum spikes. And you should make a point of throttling above idle, the sync can change.
Your video is the best.I will use your advice when I synchronizes my carbs today.
Hi MD, happens to me that Carb synchronization for one of the Carbs was imposible to tune due to the fact that the admission valve for that particular cylinder was not closing completely creating a leak, after repairing the valve seat everything went fine. so very important that valve cam head works perfectly fine, otherwise as you said you'll chase that adjustment for months with no good results.
I liked your carb sync comparison very mutch
I would like to know your thoughts on the digital carb sync gages I
Recently bought a set and so far am happy with their results a comparison to a mercury set would be an interesting video what do you say ?
Best video / tutorial on carb syncin I have ever seen! Thanks for your effort!
Thanks man!!
Correct me if I didn't understand correctly, but that fourth dial gauge indicated that there was a lack of vacuum, so you increased the vacuum at the carb. But then when measuring with the mercury gauges, they indicated that vacuum was now too high on cylinder 4, meaning the bike was actually fine to begin with and that fourth dial gauge just gave a false reading. To me that's reason enough not to trust the gauges, or at least find a way to calibrate them.
Great, learning heaps, my only feedback is the conclusion that Merc was better than the gauges based on what we saw; adjustment by gauge, then throttle butterfly seating, then went straight to merc. I think that it would have been logical to go back to gauge for a reading before the conclusion. This may have been done off video, my contribution is simply about trouble shooting technique for us, not a doubt as to merc being better or his competence.
That's exactly what I was thinking, what I saw was when he had the dials hooked up he had to adjust the #4 needle up , he also mentioned at that time the bike started sounding better and when he hooked up the mercury sticks he had to adjust the #4 level back down but didn't mention anything about how the bike sounded. So in all actuality it doesn't look like he changed anything , just put it right back to where it was at the beginning, and he also didn't prove his theory on how more accurate mercury is over the dial gauges by hooking back up the dials and showing any difference before ending the video.
Such an awesome tool to have if your a daily rider -82 650 maxim it's a givin I have one of these
Excellent video, it should be watched by all who fear multiple carb setups. It would be great if those gauges had some sort of internal damper to stop the oscillations.
Great tips, Cody! I am wondering, will the 4 gauge tool work on a dual carb motorcycle? Can you leave two gauges disconnected or is there anything that has to be done on the 4 gauge tool before it's used on a dual carb machine?
How and when is a air/fuel ratio mix adjusted?
Hi, I am really happy you made this video! And I understand that you have the Knowlege!! I Have just started a project building a Junior Drag Bike for my son, and are just now working with the Carburettors to get them to work. This is really helpfull!!
baklys So glad I could lend you a hand on the build with knowledge! Have fun with the build! I would love to see pictures when it's all done!
Easy listen to instructions and simple instructions, I’ll definitely be giving it a go . Cheers man
Great video i have a Suzuki gt750 could you show a video of a carb setup with the original setting
Pretty handy to know. Could i use a single vacuum gauge and do each carb individually?
Carb sync is a means by which variations in each cylinders draw / compression can be adjusted through each butterfly so that the result is evenness in terms of draw - fuel delivery.
Hi there Motorcycle MD,thank you for showing how to sync the carbs,you explained it Excellently,thank you so much friend 😊😊😊
great video bud cheers been sorting my own bikes for years never too old to learn new things picked up a tip with the snapping back the throttles simple trick but makes so much sence ;-) Respect fella ride safe
Very helpful, thanks! if you only have two carbs how do you define which one would be the "target" carb to base the other one off?
This is the best video I have ever seen ! Outstanding information, thank you
Many thanks for a great lesson,i shall put this knowledge into practise when i balance the carbs on my cb400/4 (1977)
Correct about everything. Only difference is that for some reason my baby varadero required 30mm less vacuum on the rear cylinder.... Manual says it so I'll do it.