Jetting tips for an XR 250

Deeler

Member

Feb 19, 2000

43

0

• Apr 2, 2003

• #1

I just picked up a very cherry 1996 XR 250 and seek jetting advice. Most of the stock equipment, including jetting, is still in place.
The airbox baffle will be pulled, the stock airfilter replaced by a Twin Air, and an aftermarket insert (Thumper?) will be used.
I'm located less than 1000' above sea level.

Thanks,

Dave

 

F

flynbryan

~SPONSOR~

May 22, 2000

1,066

0

• Apr 2, 2003

• #2

With that much more air flow your going to have to probably jet that bike pretty rich. IMHO I think its always better to start too rich and work backwards than viseversa. Get some richer pilot jets and some richer main jets. and have some fun.

 

V

VintageTech

Member

May 16, 2002

32

0

• Apr 2, 2003

• #3

Going 1 step richer on the pilot and main made a huge difference on my 98. That would be a 48 pilot and 135 main.

 

X

xr250rbb

Member

Dec 15, 2002

2

0

• Apr 9, 2003

• #4

I'm at sea level. I went up to a 48 pilot & a 138 main. I got a bit of hesitation but opened the mixture screw about 1 turn and everything works fine. I have a uni filter and hrc baffle from baja designs (kinda loud). A lot more power!!

 

H

Hot4Teacher

Member

Apr 21, 2002

87

0

• Apr 11, 2003

• #5

Your best bet would be to contact XR,s Only. I put a K&N on my wives, Supertrapp, opened up the airbox etc... and the only thing I had to do was go one up on the pilot. I called them and told me without hesitation on what to do. Good people.