what jets should i run with rad valves and toomey pipes at 500 feet sea level with no airbox lid on??

 

I would suggest 290s minimum.I also suggest changing your piolit jet to a 30.I run 310s and i still have the lid on.Thats with fmf pipes KN filter and cool heads ect.I have no problem with being lean nor rich.Part number on the piliots 2 required(260-14142-30).Every quad runs a little different, but starting at 290 should be a good start, maybee even 300s.Hope that helps you.

 

OK, first of all, do not waste your money on a Rad Valve for a Banshee. The stock reed cage is sufficient and similar in design to the Boyesen Rad Valve. All you need to do is replace the stock reeds with Boyesen Dual Stage reeds ($37.95 from Yamaha of AZ).

I run a Pro Flow filter (soaked in Belray foam oil), Boyesen reeds, FMF Fatty Torques with the air box cover off. I raised the needle one notch and use 320 mains. The bike runs perfect from idle to full throttle and the plugs are tan/brown. I run 92 octane gas with Yamalube at 24-28:1. There, mike secrets have been revealed.

Oh and I do beat Toomie piped Banshees at Glamis, repeatedly

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Skene '00 Banshee

 

You're just SOOOO proud that your quad is faster than mine, aren't you!!!

I second what the post above said. 320 mains, up one notch on the needles, and air screws out 1 1/2 to 2 turns. Runs sweet.

BTW - I'm running the T-5's with Boyesens and the pro flow foam filter.

 

sndnyrface you obviously haven't raced my toomie banshee to know you fmf banshee is faster than mine. maybee someday.....