This bike is well known for cam chain rattle, but it has an automatic tensioner so there are no adjustments. If the bike runs well just ride it. I have a friend that had his cam chain, tensioner and guides, and in less than a couple years it was making the same sounds. If the bike run rough then it is a possibility the chain has stretched and unless you are confident with timing issues take it to a pro.
SOURCE: cam chain rattle
have a real mechanic check the timing chain guides, you may even need a new one, sometimes they stretch.
SOURCE: engine rattle when bike is under load
This sounds like a classic case of pre-ignition, aka detonation and engine knock. Change to premium gas and put in a set of spark plugs that are one heat range colder than stock. It is good that you are handling this before the engine destroys itself. Yes, destroys itself. That is what pre-ignition will do. Hot carbon deposits ignite the fuel before the spark plug does. This is hard on the rod, main bearings and piston. Beat on the top of a piston with a hammer. That is what your piston will quickly look like with pre-ignition.
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SOURCE: 1997 XL 1200 Custom has chain rattle from engine
better buy a clymer manual or bring it to a tech soon
SOURCE: Hi. Suzuki rf600r 1993.
a 93 model is likely to need a chain and tensioner, if you undo the tensioner mounting bolts it should spring out 10-15mm
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