FMF SST pipe jetting/08 RM250

I have an fmf sst pipe on my 08 rm250, and the bike has a lean sound at throttle. It also blows a lot of smoke (premix smoke) until it's warm. Anyone know jetting for this pipe on a stock motor?
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Bruce372
Posts
6341
Joined
4/1/2008
Location
US
9/29/2017 10:58pm
Sst pipe is a bad design that causes detonation.

The rm250, is prone to detonation stock.

Good luck Smile
9/30/2017 11:07am
That's what I've heard. 50 bucks says it's jetted rich to keep it from detonating worse. I guess I see a new pipe in my immediate future.

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