Dicklez Posted March 25, 2012 Report Share Posted March 25, 2012 Had my 10mill cub out for the first time this weekend. I have brand new 34 TM's with powerjets. First ride out it would not come on the pipe at all. Smoking like a pig. So I put the needles at the leanest position and turned the powerjets completely in. I have 280 mains and 50 pilots btw. And took the air screws out 2 1/2 turns. It got better but would come on the pipe alittle bit but under load going up a hill it just fell on its face. Unfortunetly I had no spare jets and all my buddies run PWK. Before I switch to Keihin, I want to try and make these work. What do I need to do? Different needle and emulsion tube? Smaller main Jets? Some other info is about 900ft above sealevel where we ride, +5 timing, 24cc domes est 160psi comp, Pods, v force reeds. Any help from the mikuni experts would be appreicated. Thanks Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted March 25, 2012 Report Share Posted March 25, 2012 did you buy the carbs new? maybe theres a chance the dump tubes were drilled out for methanol? Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted March 25, 2012 Report Share Posted March 25, 2012 what dumps are in there ? should be 389q2 as stock ? how does it fall on its face ? splutter or falls off the pipe n bogs ? Quote Link to comment Share on other sites More sharing options...
Yamahopper10 Posted March 25, 2012 Report Share Posted March 25, 2012 (edited) assuming you are running gas and not alcohol: make sure you have gas needles and not alky needles, also, Im not sure if it matters with gas, but I know on alky the collar on top of the dumptube has to be grinded down a little bit. If they are too tall it will run like Sh*t Edited March 25, 2012 by Yamahopper10 Quote Link to comment Share on other sites More sharing options...
Dicklez Posted March 25, 2012 Author Report Share Posted March 25, 2012 These carbs were brand new. When I was able to get it to run and kinda get on the pipe, it felt nothing like how a cub should pull. Weak as hell. It would not pull at all going up a hill. Quote Link to comment Share on other sites More sharing options...
Boston Posted March 25, 2012 Report Share Posted March 25, 2012 id try and go down a few sizes on your jets. Quote Link to comment Share on other sites More sharing options...
shakar Posted March 25, 2012 Report Share Posted March 25, 2012 im no expert but when i bought my 28mm tm's new they came set up like poop . i had to change alot,luckly the guy snoop on here helped me out and gave me these dyno tuned specs.im guessing our carbs our identical but yours in larger = slide 2 1/2 jet needle 5L1 , pilot 30 ,main 340 float height 22 mm ,nozzle jet 175 (p-4} ,needle seat valve 2.5, this is what i ended up with my set up im thinking your main should be bigger then the 340. hope this helps...... goodluck Quote Link to comment Share on other sites More sharing options...
guns4children Posted March 25, 2012 Report Share Posted March 25, 2012 im no expert but when i bought my 28mm tm's new they came set up like poop . i had to change alot,luckly the guy snoop on here helped me out and gave me these dyno tuned specs.im guessing our carbs our identical but yours in larger = slide 2 1/2 jet needle 5L1 , pilot 30 ,main 340 float height 22 mm ,nozzle jet 175 (p-4} ,needle seat valve 2.5, this is what i ended up with my set up im thinking your main should be bigger then the 340. hope this helps...... goodluck Lord that's alot of mumbo jumbo ... Quote Link to comment Share on other sites More sharing options...
Dicklez Posted March 25, 2012 Author Report Share Posted March 25, 2012 Thanks for the advice. I've been talkin to some other people as well, and I may have something else going on with the electrical. Gonna start tearin into it today. Quote Link to comment Share on other sites More sharing options...
pabansheematt Posted March 25, 2012 Report Share Posted March 25, 2012 Lord that's alot of mumbo jumbo ... X2 Quote Link to comment Share on other sites More sharing options...
shakar Posted March 26, 2012 Report Share Posted March 26, 2012 jus trying to help fella's......if you go to any carb suply company/site thell no what is what .......................anyway goodluck Quote Link to comment Share on other sites More sharing options...
lms1977 Posted March 26, 2012 Report Share Posted March 26, 2012 jus trying to help fella's......if you go to any carb suply company/site thell no what is what .......................anyway goodluck I understood most of it. Those guys are just not as smart Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.