As the title says my mates '03 WR450 has a tight spot when turning over using the starter motor or the kicker
The engine is just as tight to turn over when the spark plug is removed!
I replaced the YZ cam with the stock WR cam (which I put in my WR400 ) and checked the valve clearances = all good.
Re set the timing chain tensioner and triple checked the valve timing.
The engine starts and idles fine but makes a funny noise when it gets to the tight spot every rotation.
The bottom end was rebuilt a few years ago when 5th gear blew, very little use since then.
This bike has always had issue after issue,starter motor problems/ battery's/ stator/ starter clutch / regulator etc.
The clutch was always dragging,I recently replaced the half spring on the inside with a normal plate and the clutch finally fully disengaged.
Any ideas where to start looking? I really don't want to have to split the cases.