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Posted

put on some fmf fatties and got her to run well,but it not the power that i had with just the stock pipes.good power in the full throttle but not really any in the bottom.bike is stock but the pipes and the reeds.little bog in the beginning then runs preety good but it has more balls with stock pipes.the mains r 270,and the pilot is stock.running it without the lid,but i don't want to do that(alot of water).can someone please help me.I'm at sea level and the temp is 25 to 50,thanks

Posted (edited)
put on some fmf fatties and got her to run well,but it not the power that i had with just the stock pipes.good power in the full throttle but not really any in the bottom.bike is stock but the pipes and the reeds.little bog in the beginning then runs preety good but it has more balls with stock pipes.the mains r 270,and the pilot is stock.running it without the lid,but i don't want to do that(alot of water).can someone please help me.I'm at sea level and the temp is 25 to 50,thanks

 

Well if you have more power with the stock pipes then something is terribly wrong. When you put the aftermarket pipes on did you rejet like you're supposed to?? That might cause the bog and crappy performance at low end. You should have rejetted to a 280-290. Doesn't sound like a lot but the smallest changes can make the shee run likle a whole new beast.

Edited by Handyman
Posted

The fattys like a bigger pilot as well. But if you are going to run w/the lid on, just close your airscrews down some. Remember the Fatty is a mid-top end pipe. It may not be as strong right off idle as the stockers, but should be extremely noticeable on top.

Posted

Wow I did not realize fatties liked bigger pilots. If a bigger pilot is needed try a 27.5. I run Pro Circuits on my '99 and as you can see in my sig the jetting I run and it runs like a striped ass ape.

Posted

Normally they like a fatter pilot, but, make sure you remove the snorkel at least.

You should be able to turn the air screws .5 to 1.0 turns out and get it to run better.

If it still doesn't run better at .5 turns out, get bigger pilots as said....

 

You should feel more power EVERYWHERE with fatties over stock, except for just off idle, where...if you're gonna spend your time at idle to 1/8 throttle, a banshee is not the right bike for you..

Posted

try the 4th or 5th clip on the needle should waken it up. did for my buddies bike with stock setup and fatties.

Posted
put on some fmf fatties and got her to run well,but it not the power that i had with just the stock pipes.good power in the full throttle but not really any in the bottom.bike is stock but the pipes and the reeds.little bog in the beginning then runs preety good but it has more balls with stock pipes.the mains r 270,and the pilot is stock.running it without the lid,but i don't want to do that(alot of water).can someone please help me.I'm at sea level and the temp is 25 to 50,thanks

 

Needle need adjusting. Main jets are for top end, and needles pretty much handle the acceleration part of the deal.

  • 4 months later...
Posted

When I jetted my bike for those pipes yrs ago. I ran a 290main needle in the stock position and airscrew 1.5 turns out. At sea level. I also had the snorkel removed and a few holes in the lid.

Posted
When I jetted my bike for those pipes yrs ago. I ran a 290main needle in the stock position and airscrew 1.5 turns out. At sea level. I also had the snorkel removed and a few holes in the lid.

 

Well...it was 6 months ago he posted this...either he figured it out, or blew it up...LOL...

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