need help tuning

[skidmarley420]

I recently got a trinity racing 421 cheetah motor, stage 4 pipes, 35mm keihin carbs, v-force 3 reeds, air box has been eliminated, and i can't get it to run right. It lacks the low end snap and when I get into 4th gear and up it loads up and fouls plugs, it also seems like the left cylinder fires harder than the right. The quad is supposed to have 90hp and has no where near that. I would appreciate any help.

I'm great with tuning banshee's, but not cubs.

Stop on over at hillclimbersforum (dot) com Lots of guys with cub motors and knowledgable people. I'm DMC-Banshee350 over there.

[hondamancbr03]

Myself and most of my friends run cub motors....If you haven't found an answer let me know what your jetting is...We can start there first.

[skidmarley420]

Thanks for the help. I'm pretty sure I got it figured out. just havn't had much time to work on it lately. been workin alot

[machwon]

The last one I tuned run 148 mains, middle notch on a C series needle and 48 pilots I believe.

[hondamancbr03]

Originally posted by machwon
The last one I tuned run 148 mains, middle notch on a C series needle and 48 pilots I believe.

That's pretty close to what i run when on the strip except i use D series needles.....My play bike i run 155 mains just to be safe.