Forum Main Tech Help/Race Shop FMF SST pipe jetting/08 RM250

FMF SST pipe jetting/08 RM250

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Aceofspades

Vital MX member Aceofspades 40261 Aceofspades https://p.vitalmx.com/photos/users/40261/avatar/c50_20170328_191835_1491356067.jpg?1491355650 https://www.vitalmx.com/community/Aceofspades,40261/all 08/30/13 6 https://www.vitalmx.com/community/Aceofspades,40261/setup 155 2494 28 3

Posts: 2649

Joined: 8/30/2013

Location: KY, USA

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?

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Bruce372

Vital MX member Bruce372 5239 Bruce372 /images/default/avatar/c50.png https://www.vitalmx.com/community/Bruce372,5239/all 04/01/08 5 179 4937 3

Posts: 5116

Joined: 4/1/2008

Location: USA

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

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Aceofspades

Vital MX member Aceofspades 40261 Aceofspades https://p.vitalmx.com/photos/users/40261/avatar/c50_20170328_191835_1491356067.jpg?1491355650 https://www.vitalmx.com/community/Aceofspades,40261/all 08/30/13 6 https://www.vitalmx.com/community/Aceofspades,40261/setup 155 2494 28 3

Posts: 2649

Joined: 8/30/2013

Location: KY, USA

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.

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Aceofspades

Vital MX member Aceofspades 40261 Aceofspades https://p.vitalmx.com/photos/users/40261/avatar/c50_20170328_191835_1491356067.jpg?1491355650 https://www.vitalmx.com/community/Aceofspades,40261/all 08/30/13 6 https://www.vitalmx.com/community/Aceofspades,40261/setup 155 2494 28 3

Posts: 2649

Joined: 8/30/2013

Location: KY, USA

9/30/2017 11:08 AM

Could I retard the timing a bit to ease detonation?

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Forum Main Tech Help/Race Shop FMF SST pipe jetting/08 RM250

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