Question about Honda VF 750 S Motorcycles
There is enough residual oil left on the cams to take care of the
first 20 rounds of rotation. The cam damage doesn't occur at
start-up, it occurs while lugging at low rpms in a high gear, i.e.
when the engine is under heavy load at low speed.
The problem has nothing to do with the "oilpipes" or their thickness.
The problem is two-fold. There was a large batch of soft cams that
wore prematurely, and the bikes made from '82 to at least '86 had oil
supplied to the cams and rockers from a low-pressure, unfiltered
source. When warmed up, the cams have about 4 psi at idle and it
never gets over about 25. With a simple modification, the idle
pressure goes up to about 12 psi and tops out at over 50
I did my oil modification in about a half day with normal shop tools.
If I can do it, anybody can.
Posted on Nov 10, 2008
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Posted on Jan 02, 2017
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