Really good and informative video. You should mention that this is the last stage of getting your bike run perfect. There is a lot of stages before this if your bike arent running well, such as; Setting valve clearance and check your ignition timing.
I have been a Harley-Davidson rider most of my life, but now I am starting to appreciate this old bikes, which are more affordable than an old Harley. Maybe i will get Lucky and find me a good 1975-1981 Airhead. I ride a 2016 Fatboy S for Sunday ride, but I think I could do daily riding on this Iconic classics, thanks for your expertise.
This vid was a god send. I\m in the final stages of a complete teardown and renovation of my -89 R100 and been worrying about the carb settings ever since I refurbished those as well. Cheers.
The fuel filters are installed backwards. You want the fuel to flow into the end where crap collects in the void outside the filter media and be visible. The way these filters are installed the crap will collect behind the filter media and plug it up.
I have been searching the internet looking for GOOD explanations with clear and informative photography to go with it.....finally found this on your channel...thank you. I have been trying to get my 1972 R 75/5 carbs adjusted for a week and most of the sites are more confusing than helpful. I immediately subscribed to your channel. One question: Do you ever need to adjust the idle mixture screw in and/or out a bit from recommended setting until the carb picks up it's highest RPM's. This is shown on a lot of the sites I looked at, but not sure if it is needed, or if the Carbmate takes care of that?
Great video, I just rebuilt the carbs for my 75/5, I see my carbs do not have the fitting protruding for the Carbmate hose to connect. wondering where I can source them.
Your "air screw" is in fact a fuel mixture screw. There is a huge difference and knowing which is which is important to help one access how adjusting it will influence the setting. The CV or diaphragm carbs use a fuel mixture screw and the older slide carbs use a air mixture screw to help adjust for smooth idle and off idle running of the motor. This setting will have the most effect at idle but they can also influence smooth running at higher rpm.
If you watched the video you would know that he did call it an air screw but right after that he explained that closing the screw leans the mixture and opening enriches the mixture. It could not possibly be explained more clearly or correctly.
Great video with important details for fine tuning! Thanks very much! Can you please touch on the cold start/choke/& warm up tips & tricks that must occur before you got your almost spot on idle at the beginning of this video? My '84 R65LS (RED) is a cold start darling whose carbs air/fuel mixture base is .5 turn out. Question: What must I adjust if RED cranks but won't start with enrichener/choke on; valves are in adjustment; carbs are clean & clear; cables in order; and needles & jets are true?? TIA SusanQ
Can't seem to find the Serial number key for the base settings. Can you please advise? If I need to subscribe what level will offer me these services? Thanks! Maybe I'll try the Clymer shop book that came with the bike.
Hi, great video by the way thank you very much. I wanna ask if you can show us how to remove the vibrations especially at the lower RPMs. I tested out several airheads this weekend and rejected buying them because the vibrations were so bad. Is there a normal amount of vibration that we should consider? I really would like to know that I’m not passing up a good bike just because it’s not tuned correctly. Thanks Jim in New Hampshire.
I have an R75/6. Does it matter which hose goes to which carb? The instructions that come with the carbmate say connect hose 1 (REF) to carb 1 "(for reference carb directly attached to the accelerator cable)"
I have a 1970 r75/5, bings 13-14, timed, new points/ condenser, spark plugs NGK, lubed and 546 new advance springs, valves adjusted 6-8, carbs cleaned, new oil, trying as much as I can, starts right away but starts to coughing a lot until it dies … don’t know what to do next… help please…🙏
This is a service I offer to my paid subscribers, with the volume of messages like this is receive I need to sort thru them, and this is my way of doing so. Please consider joining my channel as a platinum number on TH-cam or on patreon as a gold member TH-cam join- Look for the “join” button next to the subscribe Patreon Join Link- www.patreon.com/TheBMWGuy126
Hi, I've looked into obtaining a carbtune but are several different ones available at different prices, can you tell us, has the unit which you are using a model number or code? thanks.
Thanks for the video, makes perfect sense. I have a heap of slack in my throttle cable to carb joint, like 4cm . Your's is barely a few millimeters. What is the issue? thanks
Great video two points: I agree with one comment about adjusting a well tuned bike makes it look easy. 2nd I have a ‘83 R80. With a differential water gauge the bike idles great when I open the throttle the fluid almost immediately gets sucked into the left cylinder Not enough time to even check throttle cable adjustment.Am I missing something? Thanks
Nice Video! Do you have the base set for 64/26/317-318? After seeing this, I feel confident trying myself. It was at 3/4 turn but plugs were black. Now I tried half a turn. Hoping for better results
I see that some videos refer to the idle/mixture screw as the one right below the throat of the carburetor (surrounded by the tube molded in the carburetor body). In my 64/32/13 & /14 there is only that screw underneath the carburetor. There's the other one on the top, on the inside, next to where the cable attaches. Which one should I be using to adjust idle balance?
Same here on my 64/32/4 and 64/32/3 carbs. I also can’t find the screws to connect hoses... They are on an early 75/5. Very helpfull video though, thanks.
Great video - quick question for you. I live at 6000' and ride up another couple thousand feet in elevation locally. I have K&N air filters on my 81 R100RS. I had a local shop sync the carbs this past spring and was told the K&N air filters make this bike hard to start - it is hard to start cold. Once it starts and warms up the bike is idling around 3400 rpm... Which seems high. I think the mech who did the sync set the idle screw so the bike would start cold but that leave me with a high idle once warm.... Any suggestions? Thanks
At idle, my bike's (1983 R65) GEN light comes on but not flickering. What does it mean and how do I adjust it to correct setting? I think you said it should be flickering.
Thought I joined the channel ($4.95/mo) today, but I don't know where to put a question so I'm putting it here. I just rebuilt the left side carb of my 1978 R80/7 using your video. Went great. Got it stripped down, cleaned up and reassembled with no extra parts. Put it back on the bike, followed your sync video (using a Carbtune II) and again, I think I did it correctly, but when I did the temperature test on the two cylinders after a 1/2 hour ride, the left cylinder read approx. 270 degrees F, but the right one was at 360 degrees F. Any help you can offer would be great.
Sorry you can send me an email at thebmwguy126@gmail.com. You can adjust your mixture screws on the carb to dial in the temps. Making it leaner will increase the temps and richer will decrease.
you can remove each spark plug cap 1 at a time so it runs on just 1 cylinder and set the idle to ~500-600rpm per cylinder. this is not as accurate and takes a trained ear. also measure head pipe temps at idle and off idle
@@TheBMWGuy won’t pulling the plugs risk damaging coils and other electronics? I’ve been using the spark grounding method described well in youtube and airhead sites and it works very well
Very interesting. I noticed on this video at minute 2:04 there are 2 large springs. In the video, th-cam.com/video/IJo3G5VsvSc/w-d-xo.html at minute 19:35 there are no large springs. Why are these Bing carburetors different? Did I miss something in the rebuild video? Thanks, from Richmond Virginia.
As someone that has done this a million times to many bikes in the past, it is painful watching a novice explaining this making all the usual mistakes😂 But kudos for making this video. It does cover much ground which will be useful to many👍
As someone who has done this 2 million times I have to disagree. Aside from calling the idle mixture screw an air screw what usual mistakes are you talking about?
nice explanation, but tuning a well tuned engine isn't as helpful as you think it is. taking an out-of-tune engine and brining it in is perhaps more useful to novices.
![[FULL VIDEO] BMW R100RT Custom](/img/n.gif)
Really good and informative video. You should mention that this is the last stage of getting your bike run perfect. There is a lot of stages before this if your bike arent running well, such as; Setting valve clearance and check your ignition timing.
Your videos are excellent! Clear and concise explanations with videos that show what you're doing instead of the back of your hands! Thanks!
I try my best to show as much as I can!
Thanks very much. My 87 R80 is running smoothly now after rebuilding the carbs! This video is much easier to follow than others.
I have been a Harley-Davidson rider most of my life, but now I am starting to appreciate this old bikes, which are more affordable than an old Harley. Maybe i will get Lucky and find me a good 1975-1981 Airhead.
I ride a 2016 Fatboy S for Sunday ride, but I think I could do daily riding on this Iconic classics, thanks for your expertise.
This vid was a god send. I\m in the final stages of a complete teardown and renovation of my -89 R100 and been worrying about the carb settings ever since I refurbished those as well.
Cheers.
Great video and explanation of how to tune the Bing carbs
Always nice to see a new video from you!
thanks for watching, I'm trying to do a new video every week.
Well done, good timing to explain and giving the key to improve our BMW Carbs, many thanks from Argentina, Buenos Aires !
Glad it was helpful!
The fuel filters are installed backwards. You want the fuel to flow into the end where crap collects in the void outside the filter media and be visible. The way these filters are installed the crap will collect behind the filter media and plug it up.
Excellent video - it really explains this procedure well - thank you!
Best carb sync on YT. Thx so much!
Very helpful, easy to follow. Nice Job!
Glad it helped!
Bonjour de France et merci pour ces informations, travail de qualité.
I have been searching the internet looking for GOOD explanations with clear and informative photography to go with it.....finally found this on your channel...thank you. I have been trying to get my 1972 R 75/5 carbs adjusted for a week and most of the sites are more confusing than helpful. I immediately subscribed to your channel. One question: Do you ever need to adjust the idle mixture screw in and/or out a bit from recommended setting until the carb picks up it's highest RPM's. This is shown on a lot of the sites I looked at, but not sure if it is needed, or if the Carbmate takes care of that?
Great video, I just rebuilt the carbs for my 75/5, I see my carbs do not have the fitting protruding for the Carbmate hose to connect. wondering where I can source them.
My favorite Bing carbs are the R80 /7 flat top.
This is the best tutorial out there. Thanks!
Glad it was helpful!
Your "air screw" is in fact a fuel mixture screw.
There is a huge difference and knowing which is which is important to help one access how adjusting it will influence the setting.
The CV or diaphragm carbs use a fuel mixture screw and the older slide carbs use a air mixture screw to help adjust for smooth idle and off idle running of the motor.
This setting will have the most effect at idle but they can also influence smooth running at higher rpm.
If you watched the video you would know that he did call it an air screw but right after that he explained that closing the screw leans the mixture and opening enriches the mixture.
It could not possibly be explained more clearly or correctly.
You’re the dummy. Dummy.
Excellent informative video, thank you.
Good job explaining this.
Can you do one on checking compression?
I’ve heard that motor needs to be hot not cold when checking compression?
Thanks, learned something new.
Excellent
Thank you
Thanks man, great vid ✌️
exceleent video. cncise and straight forward.
no BS or small talk.
Great video with important details for fine tuning! Thanks very much! Can you please touch on the cold start/choke/& warm up tips & tricks that must occur before you got your almost spot on idle at the beginning of this video? My '84 R65LS (RED) is a cold start darling whose carbs air/fuel mixture base is .5 turn out.
Question: What must I adjust if RED cranks but won't start with enrichener/choke on; valves are in adjustment; carbs are clean & clear; cables in order; and needles & jets are true?? TIA SusanQ
Thanks for the video! Btw, I think you have your fuel filters on backwards 😊
Do you have a video to do earlier airheads? Looking for instructions on throttle gear adjustment and carb syncing an r69s.
Can't seem to find the Serial number key for the base settings. Can you please advise? If I need to subscribe what level will offer me these services?
Thanks! Maybe I'll try the Clymer shop book that came with the bike.
sign up for the platinum level and ill help you out with any problems you may have
Excellent descriptive video.
Glad it was helpful! please consider joining my channel :)
Hi, great video by the way thank you very much.
I wanna ask if you can show us how to remove the vibrations especially at the lower RPMs. I tested out several airheads this weekend and rejected buying them because the vibrations were so bad. Is there a normal amount of vibration that we should consider?
I really would like to know that I’m not passing up a good bike just because it’s not tuned correctly. Thanks Jim in New Hampshire.
Paris Dakar here
1994
👍👍💯
I have an R75/6. Does it matter which hose goes to which carb? The instructions that come with the carbmate say connect hose 1 (REF) to carb 1 "(for reference carb directly attached to the accelerator cable)"
I have a 1970 r75/5, bings 13-14, timed, new points/ condenser, spark plugs NGK, lubed and 546 new advance springs, valves adjusted 6-8, carbs cleaned, new oil, trying as much as I can, starts right away but starts to coughing a lot until it dies … don’t know what to do next… help please…🙏
This is a service I offer to my paid subscribers, with the volume of messages like this is receive I need to sort thru them, and this is my way of doing so. Please consider joining my channel as a platinum number on TH-cam or on patreon as a gold member
TH-cam join- Look for the “join” button next to the subscribe
Patreon Join Link- www.patreon.com/TheBMWGuy126
Very interesting Thank you
Glad you enjoyed it
Really useful. Thank you
Hi, I've looked into obtaining a carbtune but are several different ones available at different prices, can you tell us, has the unit which you are using a model number or code? thanks.
Thanks for the video, makes perfect sense. I have a heap of slack in my throttle cable to carb joint, like 4cm . Your's is barely a few millimeters. What is the issue? thanks
Great video two points: I agree with one comment about adjusting a well tuned bike makes it look easy. 2nd I have a ‘83 R80. With a differential water gauge the bike idles great when I open the throttle the fluid almost immediately gets sucked into the left cylinder Not enough time to even check throttle cable adjustment.Am I missing something? Thanks
Very helpful. Thanks
Glad it was helpful!
Nice Video! Do you have the base set for 64/26/317-318? After seeing this, I feel confident trying myself.
It was at 3/4 turn but plugs were black. Now I tried half a turn. Hoping for better results
Thanks! my r100/7 has never run better, in higher rpm it would pull more to one side i think, hope there is no real damage because of it
I see that some videos refer to the idle/mixture screw as the one right below the throat of the carburetor (surrounded by the tube molded in the carburetor body). In my 64/32/13 & /14 there is only that screw underneath the carburetor. There's the other one on the top, on the inside, next to where the cable attaches. Which one should I be using to adjust idle balance?
Thanks for a great video!
I have the exakt same carb on my 75/5 but I do not have the screws where you plugged the vacuum hoses. How to sync then?
look underneath the carb, they are there
Same here on my 64/32/4 and 64/32/3 carbs. I also can’t find the screws to connect hoses... They are on an early 75/5.
Very helpfull video though, thanks.
Some older /5’s didn’t come with them. You can order them in a kit, and drill them in. It’s not hard.
@@JRose670 thank you!
Hi can this carb mate be used on earlier models if the vacuum ports are added?
Great video - quick question for you. I live at 6000' and ride up another couple thousand feet in elevation locally. I have K&N air filters on my 81 R100RS. I had a local shop sync the carbs this past spring and was told the K&N air filters make this bike hard to start - it is hard to start cold. Once it starts and warms up the bike is idling around 3400 rpm... Which seems high. I think the mech who did the sync set the idle screw so the bike would start cold but that leave me with a high idle once warm.... Any suggestions?
Thanks
Typical procedure is to drive the bike for 15 minutes prior to setting the idle speed.
Do you have a link for the sync tool?? Thank you!
Ich brauche nur gute Böhm-Uhren.
At idle, my bike's (1983 R65) GEN light comes on but not flickering. What does it mean and how do I adjust it to correct setting? I think you said it should be flickering.
raise your idle until its just flickering
I have a 1972 R60/5 with 1/26/111 bing carburators. What it would be the proper settings? Please help. Thanks
Thought I joined the channel ($4.95/mo) today, but I don't know where to put a question so I'm putting it here. I just rebuilt the left side carb of my 1978 R80/7 using your video. Went great. Got it stripped down, cleaned up and reassembled with no extra parts. Put it back on the bike, followed your sync video (using a Carbtune II) and again, I think I did it correctly, but when I did the temperature test on the two cylinders after a 1/2 hour ride, the left cylinder read approx. 270 degrees F, but the right one was at 360 degrees F. Any help you can offer would be great.
Sorry you can send me an email at thebmwguy126@gmail.com. You can adjust your mixture screws on the carb to dial in the temps. Making it leaner will increase the temps and richer will decrease.
How can we tell what size carbs our bike has?
look at the numbers on the side, look for a XX-32-XXX or 40
where can i find a fuel filter like yours?
BMWPARTSGUY.COM
is it possible to sync carbs without a tool? Like by sound or feel?
you can remove each spark plug cap 1 at a time so it runs on just 1 cylinder and set the idle to ~500-600rpm per cylinder. this is not as accurate and takes a trained ear. also measure head pipe temps at idle and off idle
@@TheBMWGuy won’t pulling the plugs risk damaging coils and other electronics? I’ve been using the spark grounding method described well in youtube and airhead sites and it works very well
Jkoepis, use a spare plug to ground the uncapped cylinder.
Very interesting. I noticed on this video at minute 2:04 there are 2 large springs. In the video, th-cam.com/video/IJo3G5VsvSc/w-d-xo.html at minute 19:35 there are no large springs. Why are these Bing carburetors different? Did I miss something in the rebuild video? Thanks, from Richmond Virginia.
some have the big springs others don't, depends on what model Bing carb you have
As someone that has done this a million times to many bikes in the past, it is painful watching a novice explaining this making all the usual mistakes😂
But kudos for making this video. It does cover much ground which will be useful to many👍
As someone who has done this 2 million times I have to disagree. Aside from calling the idle mixture screw an air screw what usual mistakes are you talking about?
nice explanation, but tuning a well tuned engine isn't as helpful as you think it is. taking an out-of-tune engine and brining it in is perhaps more useful to novices.
Thanks for a great video...i have a 1992 r100r classic ...my carbs say 94/40/124A....cant find it on your charts.....cheers john
1.5 turns
Really not helpful…!