Johnny,
Hate to hijack the thread, but I use a stock Yamaha TTR125 muffler/spark arrestor that has been slightly modified on my 170cc HH. I will be starting a post on the HH in the next couple of days. Just in case the FMFs give you more grief.
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2005 Hammerhead 150
170cc BBK, PnP Big valve Head, A12 Cam, Uni Filter, Custom Exhaust, 10G rollers, 1500 Contra Spring, 2000 Clutch Springs
Just added - 2007 Joyner 250 SV - Let the fun begin
4-Dirt Bikes, Baja Bug and enough toys to keep me in the garage and out of trouble.
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