Hi all, I'm a 41-yr-old kid who grew up on dirt bikes (all 2-strokes - with the exception of brief stint with an XT350). Sold my last dirtbike (a sweet RMX250) several years ago to buy hop-up parts for my car (HUGE mistake) - and regretted it almost immediately. Got the bug bad enough to do something about it again a couple of years ago, and decided to try a street bike - and bought a new 2003 Suzuki SV650. Absolutely LOVE it. However, I was still missing the fireroads/trails/woods. Well, it's finally time to get back to my roots and get dirty again. A good friend/coworker/street riding buddy offered me a deal I couldn't refuse on his old 1993 XR650L. Nice shape for it's age... smog junk removed, big IMS tank, "XR's Only" Supertrapp-style exhaust, lowering link, etc. The odometer's only showing about 4k miles if I remember correctly. Good chain/sprockets and unused tires. Here's the deal: About five years ago, he decided it was time to freshen up the top end, so he put in a new piston/rings, etc. but decided to re-use the existing timing chain. He said it ran well for a short while, but apparently the timing chain jumped a tooth and threw the timing off - so he put in a new timing chain. He said it was running afterward - but not great. Either the valves or the timing, or both needed adjusting. About that time, he found a good deal on a new XR650R, so he bought that and pushed the poor 'L' into a corner of his garage without ever completing the job - where it sat until yesterday. He said he had put a new gasket on the right case cover, but all the oil eventually leaked out past it. One other thing: He THINKS he had a couple of parts left over after he buttoned up the top end the second time and says he honestly can't remember now if he went back in and put them back in or not. He can't find the parts now, so he doesn't know. He said they were something to do with the auto-decompression mechanism. He THINKS they were part numbers 8 and 9 in this microfische: clicky He said he thought there was a little ball-bearing on the end of the spring, but the fische doesn't show anything like that. So, I need to figure out what-all I need to do to get it running again. This is what I've come up with. Please feel free to offer advice as you see fit. My experience with 4-strokes is very limited. 1) Pull carb & clean thoroughly (I've read many threads here regarding that, so I think I'm good there). 2) Clean tank & petcock. What's the best way to do this? It's completely dry inside now, but he thinks he left fuel in it. 3) Remove valve cover (cylinder head cover) and try to determine if those decompression release parts (or others) are missing. (He says it's possible to remove the cover with the engine in the frame, but it's a pain). Double-check timing & adjust valves. Will I need a new gasket up there - or can I re-use? Do you use just the gasket dry - or apply some kind of gasket sealer/adhesive? 4) Do something about the right case cover gasket. Should I replace with a new one or try to make the old one work with some gasket sealer/adhesive? 5) Add fresh oil & gas, replace the old air filter, stick in a new battery, push the start button, and pray. I have a shop manual, tools, and the desire to RIDE this bad boy, so please let me know if you can add to or correct any of the above. Any/all help will be GREATLY appreciated. Thanks in advance!