HSR 42mm Mikuni carburetor How to clean and rebuild EASY!! Harley FXR carb
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- เผยแพร่เมื่อ 21 พ.ย. 2024
- Cleaning and Rebuilding our Mikuni HSR 42mm carburetor on this Harley Fxr.
parts used
rebuild kit--- amzn.to/34uzw1w
Mikuni Carb HSR42mm -- amzn.to/2WxwwNS
intake manifold gaskets used -- amzn.to/37xSnL8
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Putting together my Grandfather's FXR that had been sitting for three years and my first time working on a non-fuel injected motorcycle, this is the exact video I needed. Thanks for making it.
Awesome glad it helped thanks for watching!
Buddy. This guy is a total hack. DO NOT LISTEN TO HIM.
Mikuni themselves say you're supposed to aim the accelerator pump jet at the needle so BOTH cylinders get even fuel distribution.
Thanks for the detailed rebuild. I just did this for my Mikuni on a 1999 FXDL. This bike has not run properly since I inherited it after my buddy passed away. It is finally starting up without having to choke it out. I had almost lost hope because I paid someone to rebuild this and later found out that he didn’t actually rebuild it, he just replaced a couple of gaskets. Thanks again for the awesome video.
Mine sat for almost two years due to an injury and is now in serious need of a rebuild. This is exactly what I was looking for including the rebuild kit link. Thanks alot!
Thanks for the support man!
This is the only vid I can find about the 42mm mikuni. I have this carb on my Honda xr650l and I’m using your video to get it running tip top again .
This guy is a hack. Mikuni themselves say you're supposed to aim the accelerator pump jet at the needle so BOTH cylinders get even fuel distribution.
Great video. I need this to get my Honda XR650L back going.
Enjoyed the video. I tuned in because I need to replace to rubber boot on the bottom of the accelerator pump pin, and I cant figure out how to do it. Ive tried to tap the brass bushing out the bottom of the carb body, but it hasn’t cooperated. Any advice is much appreciated.
Thanks Man, Got a kit ordered and will attack mine in a day or so. I'm by far not a Carb. man but you took all the guesswork out of it. Nice video.
Just got my 42 rebuild kit. Opening up it is green muck holes clogged etc what do you clean with ? Then there is a small pc that has tiny holes in it maybe a jet is it suppose to be clean all the way thru is not. Going to follow video but think I need some serious cleaning fluid. Thx Brent .
Awesome video, thank you!!! I currently have a Mikuni TM40 on my Honda XR650 but I’m thinking about throwing it on my 1996 Harley FXDS. It’s seen some use over the years so I need to rebuild/clean it.
The camera was too far away
Thanks for the input that’s definitely a balancing act always feel like I’m too close with the camera and sometimes I’m not close enough thanks again
That is one cleannnn 1987 FXRC! Awesome video man!
Thanks man!
Enjoyed your HSR rebuild video. Great help to me. Nicely done. And I'm wondering where to buy and how do you fit the cool bicycle pedal and brake lever that is fitted your friend Chris's FXR?
This is an excellent tutorial. Thank you so much!😁
You are so welcome!
thank you for clean hints. It is great video to understand mikuni. Keep telling us this kind of things man thank you again! :)
Thank you for this video.
I think my float stuck. It started pouring fuel till i remembered the cut off valve. I tried to turn it over... and fuel poured out of the exaust while it wss turning over...how screwed am i . 2000 dyna wide glide
Ive had a Mikuni HSR carb on my 97 FLSTC for a least 4yrs and don't ride as much as I used to. It starts up fairly easy but, starting to foul my spark plugs after a few short rides? I can't believe this fairly new carb would need to be torn down and rebuilt?
Great easy to follow video. Ive usually only worked on CV 40's but just picked up an 02 Softy with a TC88 and a Mikuni HSR 42. Quick question, what is your recommendation for the idle/intermediate jet size for a TC88? Thanks!
Thanks for watching. I’ve also ran 25 or 27.5 jet it’s get plenty of fuel. On the Dyno for years 95% of Harley were jetted rich. Thanks for watching
Great video! Quick question, putting my float back on, no matter what I do it’s way to sticky. Any tips for a floppy float? Thanks!
Hmm I’d probably order a new one and just replace it
Thanks for your video it is appreciated. But did you use any carburetor cleaner to spray out any gasket material or any crap I could have been left in the carb?
Hello from Yellowknife, NT. Canada. Really enjoy your vid. Sure did make the rebuild of my carb an easy process. I have but 1 question.. My jets are 25 & 175. What are your thoughts?
Thanks for watching! What size motor are you running?
@@ProjectDadLife Thanks for getting back. It's a S&S was told its 113ci. Havnt tried to verify with serial # as yet. Dude did say it didnt run so good the last couple years he had it. Carb was horribly dirty. Took a bit to clean. We dont get the same riding period as yourself. We may get 4 months then the cold sets back in. When pulled plugs, black from fuel. May have been from dirty carb? Compression at 178 both cyls.
You mentioned that the circlip on the needle was near the lowest position making a leaner condition. Wouldn't it be a richer condition due to the needle not going as far down into the seat? That's how it is on my dirt bike anyway.
Hi, I got a 42hsr it was sitting for a while it cranks. But the throttle is only half way,,,does that mean it's clogged
What did you say? Make sure accelerator pump is clocked correctly? What is the correct position?
question... Does the emulsion tube extend out into the area with the throttle plate/ intake area? I have a friend that is rebuilding one but i think he might be missing the emulsion tube. the reason i think it might be missing is at full throttle the needle will pull completely out of the bottom of the carb and hang on the inside of the throttle plate/intake area.
Great info thank you! Would have loved to see parts and re assembly up closer or zoomed though.
Thanks for the support! Good feedback thank you!
@@ProjectDadLife You are very welcome! Thanks to you and your awesome detailed video...I took apart, cleaned and re installed a rebuild kit in my Mikuni! Next...re sealing my tank! Do you have a video for that perhaps? I am going to use Red Kote and I cleaned it with laquer thinner and some nuts to descale it...O'reilly auto parts will have the sealer for me in the morning. What a PITA to get every drop out with a stretched tank! If you have any opinions or tips before I potentially ruin my tank...I am interested :)
Also, you have the patience of a saint while explaining your method on that rebuild! Very easy to relate to an awesome teaching skill
...^5!
Yes my only complaint was the camera being far
Thanks. Rebuilt and on the road again.
This video is bang on what I need perfect thanks man 👍
No it's not. You're not Mikuni themselves say you're supposed to aim the accelerator pump jet at the needle so BOTH cylinders get even fuel distribution.
He is giving bad advice.
Excellent tutorial, thank you.
Glad it was helpful!
I have a carburetor like this, I replaced the AP o-ring, plunger, spring, the rubber bushing that rod slides in, bowl o-ring, and the rubber cap/boot. Everything but the float is new and oem stock part #s. I know the rod pushes the plunger down and pulls fuel from bowl of carb then when it goes up it pushes fuel thru a port into the jet made into bowl, then sealed & spraying through the pump nozzle/jet....it has me baffled. Any suggestions?
I found the problem......the check valve was stuck inside the bowl....I think it may be two check valves but I know its one. Once I freed the spring and ball up. I sprayed lube into the holes and put it back together....tadaah!! It was spraying!!
Thank-you very much for this video!
You're very welcome!
Mike. I have a the same carb I need to go through.
There great carbs just high maintenance.
What about the bottom of the bowl? The little plunger with the spring? Is there supposed to be ball bearings in there? Great video by the way.
How can you tell which Mikuni carburetor you have? I have a 2000 Springer with a carb stamped "Harley-Davidson" and "Mikuni," but no other markings. Thx
My hsr42 floods the minute i turn the fuel on, do you think i have to move the floats on the rebuild i heard you say the dump alot but its unridable it just wont ever stop dunping gas ever since i installed the mikuni carb. Its brand new. Maybe you can give me a solution from experience
Great video
Thank you
So 80 inch evo with v&H short shots and after market air, the mikuni 42 has 167 main and 30 low idle should I go smaller jets?
Bike is new to me and just figuring out the bike . Plugs looked pretty black
Thanks
I know this is a little late but how does it run? Mikuni says that with aftermarket exhaust (loud pipes) you should run a 165 main so your 167 is probably fine. The idle jet is probably good too in that bike.
12:17 gotta make sure the float seat goes in o-ring side first
Thanks
Good on the Mikuni info - Bad on the blaring intro music
Haha thanks man
Thx for sharing!
You bet!
What’s the piece called the needle sit in that’s between the main jet and the needle I can’t get mine to stay in
Nvm I found where to put it
I think you're talking about the emulsion tube.
Is 'nt it supposed to spray on the needle?
What's the best way to get the accelerator pump needle out? I can't seem to get mine out and don't want to damage it.
video starts at 2:03
Aww man did you not like the intro?
@@ProjectDadLife lol the intro was fine. Was just pressed for time at the moment. It's all good, brother.
Hi my name is Lawrence I'm putting one on my 1200 street tracker here in Denver 5280 ft. What elevation were you at?
I have a 2000 softail that spits quite a bit of oil from the idle screw adjustment. Please help!
Great video!
The rebuild kit you sent the link for doesn’t have a new float brother.
So you said harleys run rich typically, are you just talking about carbureted harleys? Because I know my EFI softail and a friends brand new EFI street glide do run lean
Yes just carbureted Harley’s. With emission regulations it’s almost impossible to tune a stock Harley system to not be lean lol.
Can anyone help me trouble shoot on why my slide is sticking on this carb. I took it apart to clean it and now the slide is stuck open and takes a lot of pressure to push it back down.
Make sure your slide is not turn 180degree from its original position.
great video. thanks
Two issues here....1/. You cannot guess the float level,it has to be adjusted per specs 2/. Failed to check the accel. pump piston and spring!
What did you mean when you said..."know to start it" when you were speaking about the Mikuni. I have an HSR-42 but there is no procedure that I follow.
Ok so here’s the procedure. Twist throttle 2-3 times for a fuel squirt. Pull choke and hit starter button. Never twist the throttle while trying to start the flat slide carb will cause a lean back fire back through the carb. It causes the starter to get chewed up and also won’t start. Repeat above procedure until it fires and stays running then back off choke and adjust idle! Thanks for watching.
@@ProjectDadLife I just tried that, and did not work for me. I have an enrichener instead of a choke. When I bleeped it twice, I got a backfire thru the carburetor, and smoke came out. It had never done that before. I think that with a enrichener and bleeping it, too much gas goes into the carb. I will try it next time bleeping it just once to see if that works.
Ok cool yes also every setup is going to be a bit different. In my experience mukuni carb never do well cranking while twisting the throttle. Any luck with it?
@@ProjectDadLife A single bleep of the throttle seems to works best for me. What I do is pull out the enrichener. I leave it out, then I bleep it once. The last thing I do after the bleep, is..I hit the starter. It starts fine then. I then just play with the enrichener to get me the best idle until it runs smoothly.
Nice
Exselent video but it could of done with close up zoom in thanks for puting vidio on hear
Next one I’ll get more close ups. Thanks for the support and advice
Bought a brand new mikuni carb tm42 from pro cycle and when I give it gas, the air box slowly starting filling up with gas..
What's it mean when your air fuel mixture screw runs best at 3/4 turn out. More than that it won't run. Thanks
Need a smaller jet
@@kylearizona8553 no
@@hdevo80 then what
Accelerator pump nozzle should be aimed directly at the jet needle (as per Mikuni's tuning manual). 🙄
Thank you!!!
Thank for the support
Hay mate ivl just got a brand new hsr 42mm mikuni carb with air fitler kit for my 89 fxr,can I still use the same jets out of the old mikuni carb which has been on the bike for over 25 years
thats great. sounds like a sweet bike
what about the extra parts????
Of course I usually save them but in almost all carburetor kids there’s multiple parts for different models it’s more cost-effective like that
Add some zoomed in video but good
Good video, you you ruined it with that awful and loud music.
Haha thanks man
Talk more about the repair.
👍🏻 thanks for the free-back
Dude. You really need to take this video down.
Mikuni themselves say you're supposed to aim the accelerator pump jet at the needle so BOTH cylinders get even fuel distribution.
Way to give bad advice buddy. Mikuni says right in their tuning manual for this carb to aim the accelerator pump jet at the needle so BOTH cylinders get an even distribution of fuel. YOU'RE LITERALLY SCREWING PEOPLE OVER DUDE. TAKE THE VIDEO DOWN.
Done did made then you got a bunch of thug music playing. Smh