How far off on jetting = broken motor?

[bk111]

Just wondering. I'm thinking about putting a 175 main in a 04 w/hrc kit and hmf bill ballance slip on with hrc lid on. Runs like crap w/ 195 main, 50 pilot, 2.5 turns and stock needle position. Is this going to be way too lean? Don't want to hurt the motor-it's just been rebuilt. It runs perfect w/ stock pipe w/ hrc tip but can't get past 80% throttle w/ hmf BB pipe.

[k265r]

runs like crap on top end or bottom end? is your carb in the boots all the way? did you quad sit for awhile when it was being rebuilt?

[bk111]

top end. 80% throttle and higher. Is it possible that i'm hitting the limiter? Shouldn't I be at WOT to hit the limiter?

[k265r]

sounds like it is to rich if it bubbles on top or cuts out. If it is poping on top it is too lean. try a smaller main jet and check your electrical connections on your carb.

[bk111]

I think it was too rich. I put a 175 in it and it ran much better but still with some sputtering. I've got a 170 in now and need to test that. What I don't understand is how it runs perfect w/ a 185 on the hrc exhaust tip and possibly a 170 w/ hmf BB carbon fiber slip. Can anyone explain.