2004 wr450 jetting help
Posted February 22, 2009 - 07:55 PM
First off.. my riding partner just bought an 04 wr450. The bike orignally came from cali, we bought in in colorado and was told it had been rejetted there.
We rode it last weekend in CO at 9 am 28 degrees and it ran ok..
We brought it home and got some stuff for it and pulled the carb to see what jets/needle it had.....
dwr needle... stock
45 pilot... stock
and it had no main jet in it ......
We are in amarillo tx... 3900' and temps are right now 60 ish. Fuel screw, stock, is a 1 3/4 out. We put a 165 main in it stock...
the bike starts great, idles great, pulls like a truck til half throttle and then it kinda spits and sputters. I have tried most clip positions on the needle and it runs best at the richest position. I have read that needle is pretty lean.
It has almost no decel pop, but really can't get it above half throttle.
any thoughts ??
thanks in advance
Posted February 22, 2009 - 09:31 PM
Pilot jet: idle to partial throttle
Slide: partial throttle and up slightly
Needle: the transitional portion from idle to partial
Main jet: half throttle to WOT
Posted February 22, 2009 - 09:34 PM