April 27th, 2014, 06:55 AM
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#3
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Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013
Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes
Posts: A lot.
MOTM - Jun '18, Oct '16
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Quote:
Originally Posted by linkinpark9812
Oil pressure is interesting. I seem to have found out why a heavy brake could cause low oil pressure. When starting the bike cold, oil pressure is HIGH, like 45-50 PSI. Once it is warmed up and riding it drops. The oil pressure relief valve must be about 65-70 PSI, because at about 7,500 RPM, the oil pressure peaks at 67-69 PSI and does not get higher if RPMs increase.
However, when the bike is warmed up and is idling (around 1200-1300RPM), I have seem the oil pressure sit at about 7 PSI, and I have even seen it get as low as 4-5PSI, right before the 3 or so PSI trigger of the stock oil pressure gauge, so it would make sense if braking hard and having the clutch pulled in where only the idle of the engine is turning the pump to get it below that mark. Obviously when engine is off, it reads 0 PSI.
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Interesting data.
What oil are you running?
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