FMF SST pipe jetting/08 RM250

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9/29/2017 7:38 PM

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?


9/29/2017 10:58 PM

Sst pipe is a bad design that causes detonation.

The rm250, is prone to detonation stock.

Good luck smile


9/30/2017 11:07 AM

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.


9/30/2017 11:08 AM

Could I retard the timing a bit to ease detonation?