fmf or pro circuit

[noob99]

hey guys i'm new to the whole banshee world just picked up my first 99 shee... traded my raptor 660 for it, and happy i did. my question is i have a set of fmf fattys w/ fmf silencers and my buddy gave me a set of pro circuits with the silencers. i do most of my riding in gravel pits and some track. just picked up a cool head with 20cc domes and i believe she is bored .20 over. just looking for some advice that would be appreciated

[01banch]

Try them both and make your decision based on which you like the most.

[00sheerzr]

^x2^^^^^ dont forget to rejet

[AKheathen]

x3....to give you an idea about the 2 pipes-

the fatties will come on with a powerband in the midrange, and pull all the way up.

the pro-circuits will roll-on down low and pull through to the higher end and taper off. they are most notorious for their strong mid-low power. you will have longer gears, and likely more freindly to a recent 4poke rider. on the other hand, you may just fall in love with the topend pull, as many do, of the fatties. just try them out over the next few months (don't forget to rejet for each pipe) and see which one you like best.

[noob99]

thanks alot... now any idea on which jets i should run? with a k&n with a pre filter.... or were i can find out which ones i should be running? i am only like 400 ft above sea level

[00sheerzr]

thanks alot... now any idea on which jets i should run? with a k&n with a pre filter.... or were i can find out which ones i should be running? i am only like 400 ft above sea level

if the bike is completly stock beside the filter and are u running the lid or snorkel , without the lid i would say start at 290 mains ans stock pilots and see how it runs if your running the lid with no snorkel 280 mains and lid with snorkel 270 , try the stock pilots ans asdjust the air screws you may or may not have to go to 27.5 on the pilots, and of course these are rough ideas to get you a good startin point, maybe someone with the same setup will chime in

[noob99]

she isnt stock: bored .20 with the cool head w/ 20cc domes... still run the same jets? greatly appreciated

[GrMeyer]

Whats in it now? Whats the temp your running in? With out the lid and cold temps. I would run around 300's for a starting with the fatty. keep the stock pilot. keep the needle in the middle. If your running the lid. You will prob end up in the 250ish for the mains and same with the needle and pilot.

 

Read up on this site to help you out with jetting. Also when you rejet. Make sure the carbs a synced.

 

http://www.dfn.com/benkaren/jetfaq.html