Edited by arctic954, February 07, 2010 - 07:08 PM.
Jetting question..... To those with a WR426 that went to YZ Cam Timing
Posted February 07, 2010 - 03:50 PM
Posted February 08, 2010 - 09:14 AM
Basic question.... when you converted from WR Cam timing to YZ Cam timing.... did you notice any changes in your jetting?
no major changes. The bike pulled a bit harder. If you hear it pinging then go up a main or move the clip on the needle.
I think I was running the following
165 main (maybe a 168)
Stock YZ needle
Posted February 08, 2010 - 09:24 AM
Went out today and dropped the JD blue needle to the 5th position down. (its now 30 degree out.....so its cold) She immediately ran better --- but then.....another problem kept happening ---- once warmed up and giving her some full throttle runs in front of my house.....she'd simply die on me....and at times after a full throttle run, she wouldn't hold idle and stall.
Turns out --- only had 1/2 gallon or so of fuel in the tank....AND HAD the petcock on normal --- instead of reserve. This is what threw me on this.....all last summer --- the 'ON' petcock tube was floating around the bottom of the tank disconnected from the petcock.....while I was going through the bike....reconnected it ---- but I'm not use to having one. So, when I started the bike....didn't think about it and put the bike to the 'ON' position. And since you start the bike on its kick-stand leaned over....more fuel got to the carb --- until you stand the bike upright and do WOT.
She's running great now....... and she's rev'ing out VERY nicely now w/ the YZ timing.
Posted February 08, 2010 - 10:11 AM