Question about 2003 Yamaha YZ 250 F
Hi, Tdogg331 for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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OEM parts for Yamaha
Posted on Oct 04, 2016
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Posted on Jan 02, 2017
Hey Ryan! Long time since hearing from you.
When you say "main clutch casing" do you mean the right side cover for the gearbox or do you mean the primary driven gear (AKA "clutch basket") that the clutch boss (AKA "clutch hub") and all the clutch plates fit into?
If you mean the right outer casing > they are slightly different, '97 pn 4JY-15431-10-00 and 2001 pn 4JY-15431-12-00. The entire clutch is the same from 1997 through 2001.
Posted on Jun 07, 2009
did you pull the float pin out and the brass housing that the pin goes in? you may have to clean that and go get some spray brake cleaner with the red straw and blow out all the ports. the reason it will idle with the choke pulled is it shuts off air flow which pulls more fuel to air. without the choke it cant get enough fuel. i would try the bowl again starting with the float and needle. but go ahead and just really clean it all the way through or you will just keep chasing it.
Posted on Jul 15, 2009
is this while its runnig or not, sometimes the cluctch wont engage while the bike is not runnig, but will engage when running. its common. if not they may just be stuck. did you drain the oil and have the plates exsposed to elements while the engine was out of the frame. open the clutch plate cover, check that they look fine. other than that if the clutch is hydrolic check for air in the system. and also the fluid level. good look.
Posted on Mar 05, 2010
The manual gives different grade for different temp . sorry if your in america these temps are in centigrade.
if it gets below 0 deg C use the thinner oil 10W30
5deg-40deg 15 or 20W40
If it gets to 50degC 20W50
just make sure it is motorcycle oil without friction modifiers or the clutch will slip
Posted on May 11, 2010
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