Mikuni style carb question

minibiksteve1234

minibiksteve1234

New Member
#1
#1
So I am working on my bike, I believe it is a Golden Pinto. Bought a Predator 212 did the billet flywheel, billet rod, flat top piston, 22lb valve springs, and a mikuni style carb with a pulse pump. Ran it for a break in on a test bench I built and it was running pretty good. Mounted it to the bike tonite and when I started it it was running basically full throttle. I don't have a lot of experience with Mikuni style carbs but I had not adjusted anything from when I tested it. I know the slide doesn't close completely but it seems to be open too far to me. I know it's in correctly and I backed the idle screw completely out and it doesn't seem to go any lower. How big of a gap should there be? If I turn the choke on it will idle down but the second I open it up it is way higher than idle. Any suggestions?
 
Minimichael

Minimichael

Well-Known Member
#2
#2
The slide should close all the way. Then a couple half turns to the idle screw raises it up just about a millimeter or two. That should be your starting point. Are you sure you don't have another air leak at the manifold?
 
minibiksteve1234

minibiksteve1234

New Member
#3
#3
Different bike. Bike with leak was stock 212 for my neighbors kid. This is my project bike. So it should be all the way closed. I don't see what is holding it open. I took top off and turned the slide around thinking I messed up and put it in backwards when. I hooked up throttle cable but that was farther. Guess ill have to take it completely off bike a see what the hell I screwed up
 
Minimichael

Minimichael

Well-Known Member
#6
#6
Running cables along bends and such of a bike frame can actually cause the cable to contract within the sleeve a bit. I had a bike all set up and then realized turning the handlebars left was equivalent to giving it a little gas.
 
minibiksteve1234

minibiksteve1234

New Member
#8
#8
ole4 said:
Slide in 180 out? Cutaway should be in front. Also could cable be tight not letting slide close.
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I played around with flipping it around thinking I messed it up when I installed the cable. Ill have to take the whole thing off the bike tomorrow and see what I screwed up.
 
minibiksteve1234

minibiksteve1234

New Member
#10
#10
sparkwizard said:
When you ran it on the bench for break in, was there a throttle cable hooked to it?
Click to expand...
There was and it worked fine. I had to take it off and run it through spots in the frame so somehow I have reassembled incorrectly. Unfortunately I have been sick and not feeling like working on it after work fornthe last couple days. Hopefully tonite I feel.better.
 
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