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General Category >> Rubber Side Down! >> Just about had it with my Mukini Carb
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Message started by JayR on 10/02/24 at 13:10:03

Title: Just about had it with my Mukini Carb
Post by JayR on 10/02/24 at 13:10:03

About 3 years ago I got a carb from Lancer, the mukini.
I have spent the last year trying to get it to run. I tried cleaning it 3 times then finally brought it to a shop.

The shop got it running and set the pilot and jet was clogged.

So today while riding, I had to crank the idle all the way out to stop it from stalling. I just filled it with new gas so the gas itself should not be an issue.

The worst part is fuel just flows out of the overflow on the botton all the time. The repair guy said while it's running it shouldn't be an issue, but if I stop some place, I should turn the fuel to off.

I can look down and fuel is dripping out even when it's running.

I think I'm just going to sell it and forget about it. :( >:(

Title: Re: Just about had it with my Mukini Carb
Post by ohiomoto on 10/02/24 at 18:55:53

The "repair guy" returned the bike puking fuel and told you it should be fine when running?!!

I would find another "repair guy" and/or a fuel-injected bike.

If you want to fix it you'll have to remove the float bowl to clean/replace the float needle and check the float level.

Title: Re: Just about had it with my Mukini Carb
Post by JOG on 10/03/24 at 01:38:49

It's either got trash in the seat,the needle is bad or the float is not adjusted properly or some combination of the above. Until You learn how to perform such basic maintenance or get lucky enough to find someone who isn't A fraud, you're not going to be happy. It's not the bike. It's not the carburetor. It's the Guy doing the work.
You don't have A Lemmon.
You need to learn how to do this. It's not that hard.
If it's dumping fuel the problem is that the float isn't shutting off the fuel coming in to the bowl.
Period.
Fix THAT..

Title: Re: Just about had it with my Mukini Carb
Post by Dave on 10/03/24 at 02:47:39

The Mikuni carb from Lancer on my bike has been there for 12 years and has never given me any problems. It does not leak and after I got it jetted properly it never has required any further adjustments.

Your symptoms would lead me to believe you are getting dirt in your fuel from somewhere - or the bike is sitting idle for long period of time and the fuel is going bad and gumming up or corroding your carb.

A stock carb will likely suffer the same problems if you can't correct the dirty or old fuel problem.

Title: Re: Just about had it with my Mukini Carb
Post by Savard 05 on 10/03/24 at 03:33:15

Do you fill up more at gas stations or use gas cans? If cans I'd get a funnel with filter screen helps keep your carbs clean from junk in bottom of gas cans. A little MMO or seafoam from time to time will help too.

Title: Re: Just about had it with my Mukini Carb
Post by TheBabyDerp on 10/03/24 at 05:24:27

This doesn't sound like a Mikuni problem, this sounds like a user error. Get a new guy or learn to do it yourself. Sorry if it sounds harsh man.

Title: Re: Just about had it with my Mukini Carb
Post by JOG on 10/03/24 at 21:17:56

Get a gas sample. A clear glass container. Open the drain on the bowl and catch some gas. Look it over. Smell it.

If you don't have junk in the needle/seat, either the float has fluid in it or it's adjusted wrong.
It's not the carburetor. Any mechanic who tells ya
It's okay while it's running
Isn't a carburetor guy. He might know fuel injection systems, but it sounds like he's not qualified to work on a carburetor.
Run away,run away!

Title: Re: Just about had it with my Mukini Carb
Post by ThumperPaul on 10/04/24 at 08:06:02

To pile on to the comments here, any carb will get gunked up from sitting up. And your mechanic should be fired for not properly cleaning it and then suggesting to use the petcock valve as a workaround for a faulty carb job and real problem. Nothing more fun than riding a bike with a leaking carb. The float or main float valve is sticking (got funked up and dirty) and causing the float bowl to overfill and piss out.

I’ll give you $40 for it if you want to try a different carb. :-/ :-?