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Motorcycle Mechanical
Warnings
a.k.a., "oh, shit!"
1995 Honda VFR750.
The rear brake pedal bracket is anchored to the right rear
of the frame by two heavy steel allen bolts. This bracket
holds the rear brake lever and master cylinder assembly. In a
relatively low speed low-side (right side) the assembly
leveraged the upper of the two anchor bolts, causing the
threaded tab on the frame to break in half. Since the tab
into which this bolt was threaded was part of the main
casting, the bike was written off. The cost of stripping the
frame and properly welding it (preferably "MIG"
welding -according to friends of mine in the aircraft
industry) was prohibitive, in addition to the usual bodywork
costs.
About a quarter of the Honda owners I've spoken to report
one or more handlebar end-weights falling off. Tighten them
now, and check them often!
1985 Yamaha RZ350
The oil injector pump is gear driven, off the crankshaft
with a plastic gear. These gears live in the same oil bath as
the clutch and gearbox. A minor failure of one clutch plate,
un-noticeable in terms of performance, caused a small piece
or two of clutch plate to go floating around. One piece
apparently got caught in the plastic gear and broke it,
causing oil pump failure and, of course, piston seizure soon
after.
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