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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FMF SST pipe jetting/08 RM250
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Joined: 8/30/2013
Location: KY, USA
Posts: 3727
Joined: 4/1/2008
Location: USA
Sst pipe is a bad design that causes detonation.
The rm250, is prone to detonation stock.
Good luck 
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Posts: 2603
Joined: 8/30/2013
Location: KY, USA
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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Posts: 2603
Joined: 8/30/2013
Location: KY, USA
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