Mikuni VM 18mm Carb.

Tyler6357

Well-Known Member
Mar 15, 2012
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Santa Barbara, CA
Hello everyone
Running a PK80, 40 stroke, short connecting rod, low wrist pin piston, with a 6cc FredHead clone and a CDHPower G2 4 peddle reed valve/windowed piston. I currently have a Dellorto Clone(RT)Carb. It seems to run pretty good but damn, it really has trouble moving into low idle, sometimes I have to slowly engage the clutch slightly just to get it to slow down. I was thinking of upgrading my carb. I was looking at the Mikuni VM but interested in what you guys think of this carb or if you would recommend a different one to use with this set up?

Mikuni VM 18mm-----> https://www.ebay.com/itm/Mikuni-Gen...h=item4d2f826c76:g:AKQAAOSw~4taWxlQ:rk:2:pf:0

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Tyler6357

Well-Known Member
Mar 15, 2012
1,130
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Santa Barbara, CA
Mikuni's are great carbs. The vm is simple to tune, and rarely have any problems. Except they're really sensitive to dirt clogging the float needle, but run a fuel filter and it's no worries.
Well, I always run a fuel filter, do you usually have to change the jet? Do you think it would be much different than the carb I'm currently using?
 

bairdco

a guy who makes cool bikes
Aug 18, 2009
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living the dream in southern california
I've never had the clone carb, so I couldn't tell you. I stay away from clones, and get the real deal, just because I figure, y'know, they've gotta be better.

You'll probably have to tune it and/or jet it to your motor, but it's not difficult.

I just got a 19mm polini cp carb to replace my 16mm vm for my Minarelli bike, and I'm going to do some porting and other upgrades. The polini is a beautiful carb, but I don't know how well it works yet.
 
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Tyler6357

Well-Known Member
Mar 15, 2012
1,130
163
63
Santa Barbara, CA
I've never had the clone carb, so I couldn't tell you. I stay away from clones, and get the real deal, just because I figure, y'know, they've gotta be better.

You'll probably have to tune it and/or jet it to your motor, but it's not difficult.

I just got a 19mm polini cp carb to replace my 16mm vm for my Minarelli bike, and I'm going to do some porting and other upgrades. The polini is a beautiful carb, but I don't know how well it works yet.
Well, maybe I should get the polini if it's better, Please let me know what you think after you use it, thank you.