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check the power steering pump.it could be something else but alot of them make noise. if it only makes the noise whrn going down the road maybe its not the engine, check the wheel bearings
if the car has alot of miles on it , a little bit of top engine noise is nothing to worry about. if the car does'nt have alot of miles on it or the noise is real loud then you may have a lose valve or need rocker arm ajustment.
There can be many reasons for the noise but if you can pour some water on the fan belt and the AC belt while the engine is started and if the noise drops off then the belt can be faulty. Also check the pulley idler, check the water pump. If not there can be faulty timing chain , idler or within the engine.
It is likely that your noise is coming from either the cam chain or rocker arms. As the engine gets hot, the oil gets alot thinner-especially if the oil is in need of change. This would explain the extra noise when it is hot.
First thing to check is the valve clearances to be sure they are within tolerance.(Intake:003-.004" an exhaust:.004-.006") Be sure to check the valves on a cool engine only.
If they are in spec, and you've got fresh oil in it, and the noise continues-next is the cam chain. You can check this by removing the valve cover from the top of the engine. You have an automatic adjuster on this bike, so there should be no slack in the cam chain. Specifically, check for slack on the rear side. If there is slack, you'll need to get your cam chain replaced.
If you've verified all the above, next thing to suspect is piston noise- usually from wear on the piston skirt. This can be verified by having a leakdown test done on the engine, since an engine with piston noise will also show alot of leaking past the rings. I hope this helps you out.
One quick way to check the alt. is when it is running discounect the pos. cable and if the engine dies it is a bad alt. If it stays running it's good. Let me know if this was helpful.
sounds like the light engine there are alot of problems with the light engines and quite a few have had a grinding noise. The only other possibility would be the color wheel. But I would lean heavier toward the light engine being the fault.
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