no top end power.

[Dobyns]

ok heres the deal... i changed my fuel mixture after i broke in my engine to the more lean mix, also before i did thwat i put a new exhaust on it... the bike ran fine with the old mixture, but now that is is more lean it has NO top end power at all, any help?

 

[Bikeguy Joe]

What exhaust did you put on it?
If you went to a leaner ratio (40:1 vs. 16:1) you make the fuel to air ratio much richer.

Is it four stroking now?

 

[Dobyns]

I put an arrow expansion chamber exhaust, not to familiar with the term four stroking.

Rejet?

 

[Bikeguy Joe]

Well you gotta know what it's doing before you re-jet.
Do a plug read, and see what that tells you.

Four stroking is when it's too rich and fires every other time.

 

[crassius]

STOP! You've done two things and gotten a change and you can't tell which thing changed it.

First, try going back to the same mix you had to see if that helps, if not, go back to the old exhaust to see if that helps.

Once you find what made the difference, you have a better chance of sorting it out.

 

[Bikeguy Joe]

STOP! You've done two things and gotten a change and you can't tell which thing changed it.

First, try going back to the same mix you had to see if that helps, if not, go back to the old exhaust to see if that helps.

Once you find what made the difference, you have a better chance of sorting it out.

Or read my signature.