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Posted

I have a 2001 yamaha banshee with stock cylinders and pistons

It has:

Boost bottle

Fmf gold series with silencers

Dual k&n

I am at 3500ft above sea level

Days from 50-100°

Are size 330 jets too big?

I rode my '94 at 5000 feet last summer, it ran great with 240 mains, 27.5 pilots, stock engine, FMF, stock air box. I put K&N's and a cool head on this winter, I'm thinking I'll end up around 260 this summer, but won't know for sure until weather warms up.

Posted (edited)

I've always found fmf to like 30 oilots

Is there a big diffrence between 27.5 and 30?.

I also forgot to mention i belive i might have boyesen reeds.. housing looks stock except it has carbon fiber plates

I rode my '94 at 5000 feet last summer, it ran great with 240 mains, 27.5 pilots, stock engine, FMF, stock air box. I put K&N's and a cool head on this winter, I'm thinking I'll end up around 260 this summer, but won't know for sure until weather warms up.

Have you done a plug chop on it? Edited by gcautosports
Posted

Also, I found that Rocky Mtn ATV had best price on jets and float bowl gaskets. I bought jets from 220 - 300 and extra gaskets, my used gaskets leaked.

Posted

No plug chop, just read the plugs and listened to the engine. Pistons and cylinders looked good this winter when I put the cool head on. You'll know when you're too fat on top, the engine won't rev up well. Start high and work your way down.

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