Clutch slippage can be caused by any number of problems. First would be plate wear, where the friction material wears and the total pack thickness of the combined plates does not produce adequate pressure to fully grab under acceleration. Read More...
A rattling or grinding noise coming from the mid-center and/or top of the engine most often indicates loose cam chains. The noise is more audible at lower engine RPM, or during deceleration.Read More...
Through the many years of working with the Honda V-4 engine, the main problem causing cam and rocker arm failure is the lack of a good oil supply to the heads. Read More...
Ticking or valve train noises are generally caused by loose or
improperly
adjusted valve clearances. Louder ticking noises isolated to one or
more
valves can indicate beginning or advanced camshaft and rocker arm
failure.
A deeper ticking noise can often be traced to excessive clearances in
the
cam journals, which allows the cams to oscillate too much while
rotating in
the head. Lack of proper oil flow and pressure will also reduce oil
suppression between metal-to-metal surfaces creating erratic noises at
lower RPM.
The best way to determine the source of the noise is to
remove
the valve covers to check the valve clearances and inspect the top-end
components for wear or damage. Installing a properly engineered top-end
oiling system is the best assurance to prevent premature cam failure
and
overall wear.
