Anatomy of Mikuni Carb : Pro Tip

A Mikuni carb can be a great upgrade to your motorcycle. Knowing what the basic parts are and how they affect tuning is key. We walk you through some of the basic parts of a Mikuni HSR42 to show you how it works.

#Mikuni #Carb #HSR42

[kendrickpavey]

This is the best Mikuni flatslide video I have found that gets to the point quickly and explains exactly how it works. Thanks!

[bharatnagarajan]

Thats good one, Part 2 would be great showing how to change the rubber gasket to the slide.

[garycjohnson]

I've watched several of the Mikuni rebuild videos and learn a bit more from each. This one was equally informative and I learned the necessity of having the right tools, screwdrivers, etc. The assembly lube used looks suspiciously like Yamaha marine grease but the take-away is lubing the gaskets and seals with a thin film before reassembly. I'll look for the tuning tips as well since there was't any mention of the pop-off pressures, etc. My GP 1200 has triple Mikuni's and has been running ragged, lacking the "hole shot" acceleration it came with so I'm diving into the carbs.

[PeterShamray]

Don't need to remove the allen bolt holding the needle clip. Just loosening allows moving the clip to the side, out of the way.

[arthurleino]

I have Mikuni VM on my Shovelhead. The Throttle cable was used on the Delorto pumper that was on it before.

[getoffmygrass]

Great tutorial. Imho, I think keeping the Phillips screws on the bowl is key to not over tightening and cracking the body as they will start stripping if turned too tight. Kind of a safety blanket. Best performance carb for street riding imho but extremely sensitive to certain builds on the pilot circuit. Follow the manual exactly as written and this carb will wake up any bike with satisfying results. Biggest con is it’s inability to make atmospheric changes, so if you live in an area like New England as I do, be prepared to make fine adjustments on your pilot as the cold weather comes in.

[Chatterbox-zoxl]

Nice instructional video can we get to the fuel filter location

[kennethk]

Thank you so much. Best video I found on this carb.

[CarlosGarcia-lshn]

You mentioned the clacking sound from the slide when the o ring wears out, is that something that can be easily replaced? On my bike, it does it when it is cold, but not hot, What would cause it to do that?

[shawng]

Getting ready to tear down an older revtec with a 42 on it. So with the adapter it will swap over to a normal HD air cleaner? I have a SE and they want their old one gone.

[bradgoodale]

Not trying to be that guy either but you had a great video. I love it. But however, when you start to say around 815, don’t lose that clip does it go over or under the circle clip on the needle there’s some details here that everybody I think is watching the video for and you’re talking about every other thing but I think whatever everybody wants to know then you don’t have it on there right away, it’s been cut. I get it I get it.

[davidpillado]

Mikuni has many open ports. I know 1 is for VOES, but what about the others? Do I just block them off or leave open? Thanks

[munkyassproductions]

great video I wish I knew about that bolt on the bottom before I jetted my carb 20 different times.

[patrickconnolly]

Didn’t say anything about the red capped thing on back and black capped thing which is the two things I was wanting to know about.

[rockgear]

My carb running too high on idle, i unscrewed the idle until loose but the idle is still high, what should i do?

[basmu]

How come they don’t have a electricity wire ? Changing out my stock Chinese garbage and just got my Mikuni Vm24 round slide in the mail today. So I’m trying to figure out why the old one has a green and yellow wire slot on the side. I have to drop the whole engine just to get the carb out because the screws are stripped on the intake manifold and the throttle cable where it connects . It’s a headache but it’s whatever

[SD-njcy]

Does the gentlemen giving the presentation work for J&P or somewhere else?

[brentrlarson]

On my new mikuni i thought it was bad gas but with fresh fuel it coughs and spits thru air cleaner what do i need to adjust

[mikeyikesem]

Is there a video that shows how to tune this carb?

[JohnRodriguez-nruz]

I just bought a bike with this carb and it’s been sitting for 6 years so the slide won’t even open. Not sure if it’s rebuildable or not. Any advice on what route to take?