99 WR400F YZ Timed =Jetting Issues?
Posted December 23, 2004 - 10:05 PM
I currently am running:
The stock pilot (45) with two turns out.
175 main jet (168) stock
Stock needle in Center position
White Brothers E Series pipe with spark arrestor insert and 5 plates
White Brothers header (but dented a bit by previous owner)
Air box snorkel removed but top lid still on
Temp today when running around 45 degrees at about 450 ft above sea level, foggy with high humidity.
I took the time to put the bike back to WR timing (just to make sure I didn't mess anything up) and it ran fine a bit richer from the needle setting but nothing at all like it was with the YZ timing. It idled perfectly fine!
So my question is whether the YZ timing effects jetting?
Also, while I'm at it do you loose any bottom end by going to the YZ timing?
Thanks in advance!
Posted December 24, 2004 - 12:20 PM
Posted December 24, 2004 - 06:44 PM
It felt like it wanted to be leaned out and that would help substantially. I have been riding two strokes and would really appreciate the snappy two stroke like bottom end but where I live there is a ton of slippery clay on worn out rutted trails so will probably leave the timing alone until spring or the next valve adjustment. Somehow that chugability in the snotty sections is too much to resist and I can always take my WR250 two stroke out when I'm looking for some snap!
Thanks again and Merry Christmas!