Everyone Please Read (Jetting info Needed)

[9FR Productions]

I hate to beat this topic up but I need help. I have a 2001 Banshee with a stock motor. All I have done is added is a pair of FMF Fatties and a K&N Filter in the airbox. I have taken the airbox lid off and plan on running it that way. There is also a outterware on the filter that's it. Here's my specs:

 

Elevation is 4200 ft

Temp is in the high 50's to the low 60's

Running 91 Octane gas

Mixing 40:1 (Klotz Supertechnoplate)

 

Any Sugesstions??

 

 

p.s. I have had people tell me to run a 25.0 stock pilot jet or a 27.5....

[Overboost]

27.5 pilot and 290 main

 

start there

 

if your low end bogs, go 25 pilot.

 

bog up top, drop the mains a size at a time

 

EDIT: 4200 elevation....

 

25 pilot and 270 mains....

 

you have no air

Edited April 15, 2009 by Overboost

[shee4speed]

he has a little air.I ran 280's at 7500 ft. try 290's and go from there.

[alexmarq1986]

Im at 4000 ft and have the exact same setup as you and i run 27.5 pilots and 280 mains in 70 degree weather but for 50-60 degrees i run 290.

Edited April 15, 2009 by alexmarq1986

[AKheathen]

Im at 4000 ft and have the exact same setup as you and i run 27.5 pilots and 280 mains in 70 degree weather but for 50-60 degrees i run 290.

i concur

[shee4speed]

i concur

 

 

:shrug:

[AKheathen]

just sayin i agree with both of you. 290+27.5 maybey even 300 with the 91, but probably not

[dajogejr]

Wow....you guys run that fat of jetting with an airbox at 4200 feet?

 

270 to 290 main is what we run in that setup at or near sea level.

 

Two questions that need to be asked. Rider weight and riding temps?

[shee4speed]

Wow....you guys run that fat of jetting with an airbox at 4200 feet?

 

270 to 290 main is what we run in that setup at or near sea level.

 

Two questions that need to be asked. Rider weight and riding temps?

 

 

he has a K&N with no lid

[dajogejr]

he has a K&N with no lid

 

Yes, but he's still running an airbox...I got that part.

[GrMeyer]

shit with pods and just exhaust I was running 300s and 25's for the dunes... I would have to stay start out at 25p's and then 290 and drop from there.

[dajogejr]

In my opinion, there are three stages of air filters.

 

Airbox full (with lid, get rid of that damn snorkel)

 

Airbox with no lid or a pro lid/modded lid or K&N type Outerwear lid

 

Pod filters with NO airbox.

 

I've jetted each, and they all call for a different set. Obviously, the more restrictive require less fuel/less jet.

[9FR Productions]

In my opinion, there are three stages of air filters.

 

Airbox full (with lid, get rid of that damn snorkel)

 

Airbox with no lid or a pro lid/modded lid or K&N type Outerwear lid

 

Pod filters with NO airbox.

 

I've jetted each, and they all call for a different set. Obviously, the more restrictive require less fuel/less jet.

 

My weight is around 225 and the temp is in the low 60's....

[9FR Productions]

My weight is around 225 and the temp is in the low 60's....

 

 

So I rode all day on Saturday and it seemed to run fine. When we got home and started the bike to take it off the trailer it wanted to idle. But when you hit the gas it just wanted to die out. Im at 4200 elevations 60-70 degree weather and have a airbox with the lid off. Also running a k&n air filter with a set of FMF Fatty Pipes. Im jetted at 25 on my pilots and 280 on mains. Any Suggestions???

 

[AKheathen]

i've heard the fatties like 27.5, and what's the elevation where you ride? 4200 @ your house?