02 WR 426 Jetting....Calling all Guru's
Posted February 12, 2003 - 08:25 AM
Big gun Race, no air lid, going to YZ timing and BK mod
Posted February 12, 2003 - 02:20 PM
Do a search on YZ jetting on the WR side. Or search for "ELN" which is another popular needle code, a bit richer than a YZ needle off the pilot.
I have changed three WRs over to YZ needles (more or less) and IMO it is the best twelve bucks you could possibly hope to spend on your bike (other than a YZ throttle stop).
BTW, post your altitude/climate and you should get some more specific advice.
Well, Port Huron MI sounds like sea level/very cold. I would WAG that a 45 pilot, 170 main, 100 Pilot Air Jet (YZ part), ELN # 4 is a good starting point.
That is a WAG because I'm at 4k ft +, so hopefully someone who rides at sea level will come by and help out.
Hope this helps.
Posted February 12, 2003 - 05:43 PM
5NL-14916-EN-00 (#OBELN) for YZ250F 2003
5TJ-14916-D1 #DUQ From my manul for richer jet.
5TA-14916-JN-00 (#NDJN) for (YZ-450F) 2003