Join Date: 04-16-2019
Location: Worcester, England
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Re: oil pressure
A real long shot, but if the bike had been raced, the owner at the time might have had the flywheel machined back to save weight. That will cause the revs to drop much faster. (I did exactly this with my CB750 back in the 70s)
Still, that should not affect the oil pressure light unless the idle is way too low.
You can be sure the the cam chain installation was right because you say that the bike was like clockwork for a week.
2018 CBR1000RR SP2 / 2011 CBR1000RR / 2004 CBR1000RR / 2003 CBR954RR / 2001 CBR929RR (Erion Racing Edition)
1985 Honda VF1000R / 1985 Honda NS400R
2007 MV F4 1000R