I have just purchased a used, but apparently low time, .91AC which has some minor rust marks on the valve rockers and a small spot on the crank counter weight / web area. What is the best and safest method to clean this up prior to running? Because this engine quite possibly has been sitting around for some time what items should be replaced, eg gaskets, seals, as a precautionary measure?
Unfortunately no manual was supplied, and as I have no experience with YS, or any four stroke's for that matter, it would be nice to know how to make the necessary adjustments. Is a manual available for download anywhere?
Are any mufflers available? It only has a header pipe and I would like to quieten it down a little.