i just cant seem to find the right jetting for my hmf slip on pipe and k and n drop in filter. Can you let me know what you are running for these mods?
i have went from a 150 main to a 160. it still wouldn't run top end it would just bog. then i went to a 167.5 and now it pops and cracks on the top end. but low end is always good and strong.

 

What are you running for a pilot jet?? Also, why would you just go to a 167.5 when a 160 didn't work?? Try something in between there, like a 165, or a 162.5......My guess is that you would be running a 165 main jet. I have a pure polaris/wb pipe, and a drop in kandn filer, and nicholas cycle carb mod, and I'm running a 172.5 main jet..........



That shows ya what the carb mod does!!!!! It is really worth it........


Also, get on predatorowners.com and look either in modifications or drivetrain, and there is a recent post in there about jetting.......someone might have run the same thing as you........

 

CF
Go to PredatorOwners.com There are plenty of jetting answers for air box mods and pipe. I just bought a CFm air box and I am waiting for thr K/N filters to put it on. I was thinking about the HFM pipe but not sure which one is for me?

Good Luck