WR426 jetting help
Posted December 05, 2004 - 03:44 PM
"Like everyone else before, I have the dreaded bog off idle (when the throttle is wacked.) So bad that it would kill the bike. It became more noticeable when I did the YZ cam Mod. I did the BK mod and it helped (bike doesen't die). I have read all the other posts looking for the fix. Still confused so I ordered your jetting kit. Are there any other jets (leak, etc) that I need to purchase while I'm waiting on your kit in the mail? Are there any mods I still need to do?
I ride in SoCal from sea level to 2500ft.
01WR426-YZ cam mod, Air box lid off, FMF Q pipe, BK mod set to .4 sec, Grey wire removed. Stock jetting-165MJ, 42PJ, stock needle set on 4th clip"
Also tried moving clip up and down.
Posted January 03, 2005 - 09:13 PM
Posted January 04, 2005 - 12:58 PM
Did you have this problem before the YZ cam install?
I had an 01 WR426 that ran absolutly perfect with stock jetting in socal, I could've sworn that the stock main was a 168.. (maybe that's what I had) At any rate, have you played around with the air screw? A lot of times the air screw could be the culprit. I had my needle in the third position always, now that I think about it I had the stock YZ needle in the bike but I remember it not being much different than the WR needle.
Posted January 04, 2005 - 09:58 PM
Posted January 05, 2005 - 07:20 PM