Hello. I am new to this site. I have a YZ250 2002. The problem I have is the initial power on the throttle. The powerband is fine. I have completely cleaned the carb, replaced all the items with stock parts but the initial throttle is sluggish until I pop the clutch once or twice. Any ideas? I just replaced the exhaust, pipe, and seals.
No Power on intial throttle
- Thread starter Clif
- Start date
Start with basic stuff like repacking the silencer, cleaning the coil ground strap connection, verifying the compression and the power valve operation. Once you have verified it's in proper mechanical working order you'll likely have to look at cleaning up the jetting.
- Thread starter
- #3
thanks bud for the guidance. I replaced the exhaust with FMF silencer and replaced all the head in exhaust seals. I replaced all carb componets with new stock and reset the float. I am certainly going to replace the reeds and clean the PV with carb cleaner this weekend. Its just annoying that the powerband is huge but the intial throttle suks wind.
I'm no expert but I play one on the internet.
But, yeah, that would do it. What's the purpose of a power valve?
In simple / general / mostly accurate terms :
jaguar
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Make sure engine compression is good and raise the carb needle one or two notches.
Also adjust the timing a bit more advanced since partial throttle needs more ignition advance. Advance it till Paul is happier but Peter is a little disappointed. (Paul is low range power and Peter is high range power)
Also put in an iridium plug.
Also adjust the timing a bit more advanced since partial throttle needs more ignition advance. Advance it till Paul is happier but Peter is a little disappointed. (Paul is low range power and Peter is high range power)
Also put in an iridium plug.
