dbrider234

Member
Jan 8, 2004
3
0
Has anyone modified their stock silencer by cutting the middle weld and tearing out the spark arrestor. I was running a fmf powercore 2 and then i did this and it runs much cleaner, would i still have to rejet for this, because at 1/4 it sputters slightly. What would i do to fix this.
 

Studboy

Thinks he can ride
Dec 2, 2001
1,818
0
The stock silencer on all of the modern MX bikes have no S/A, neither does the powercore 2. What exactly are you talking about?
 

Rcannon

~SPONSOR~
Nov 17, 2001
1,886
0
I made a short silencer for my YZ 250 out of a stock Yamaha part. It was easy to shorten this from the front rather than the rear. There was no spark arrestor inside.

It ended up being very cool. Throttle response was better and noise was similar to stock. I did not need to rejet.
 
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