Hey guys and gals, I just picked up a great condition 1983 XL100S and I need a few questions answered. First off, how much oil and what type of oil should I put in it. It only has 1600 original miles. I noticed a very faint "tick" coming from the motor but it runs great right now. Also, how much oil does it hold? Also, the dork who owned it before me, cut the baffle off the end of the muffler so it sounds obnoxious. I have the piece he cut off and I'm wondering if it would be cheaper to have it welded on, or find something I could fit into the end of the pipe to quiet the sucker down a little. Anyone know where I can find a basic maintenance manual online?