jetting '01 CR 250 for high altitude

U

uhlanmc

Member

Aug 23, 2005

32

0

• Aug 23, 2005

• #1

I am rebuilding my friend's '01. The bike is way too rich for the riding in the elevation (5,000ft). The carb is a mikuni, and I've heard of some people machining the slide to help dial the carb. I'm looking for a reference point with the needle, pilot jet, etc.

Thanx.

 

K

kawamaha

Member

Mar 16, 2005

179

0

• Aug 24, 2005

• #2

my jetting:
http://www.supercross-online.de/e/CR250e.htm

 

D

dale williams

Member

Feb 3, 2000

69

0

• Aug 29, 2005

• #3

I have one of those bikes. I run a 15 idle jet, an S-7 needle jet (you buy them from your yamaha dealer), a 6BEH1-76 needle on the second clip and about a 380 main for altitudes around 5000.

 

B

bikepilot

Member

Nov 12, 2004

804

0

• Aug 30, 2005

• #4

FYI the S-7 thing is the nozzel, i.e. part the main jet screwes into and you can get them from any dealer that is a sudco distrib (virtually all dealers are sudco distribs). I'm at lower altitude so my specs will not help you much.

good luck