Okay, I give up on the original carb on my 1998 WR400F. I clean it ,it runs ok for awhile ,then no idle and hard start after it sits a week or two.
I am planning to buy a new 39FCRmx, with built in hot start, TPS and choke. Keihin claims this is the best ever carb for 4 stroke dirt bikes.
MY question for you all is, has anybody here went with the new carb option? Was it worth the approx. $600.00?
Did you have any trouble adapting it to your WR or YZ? From what I can see it needs an adaptor on the air box end and different throttle cables.