I found mine at a yard sale. Had been on a pressure washer that was allowed to freeze and crack. The seller pulled the engine and said he only ran it a few times during the summer. Then it sat in his garage. I got it for 25 bucks. No idea on the clutch.
I never did anything with the engine because the exhaust is facing the wrong way.
Looks like a neat engine to use. Very light. Starts up instantly.
They will run a very long time with proper maintenance. I have used them on several bikes and they have been really reliable. I have a header that I can lend someone if they want to duplicate it. I bet there would be a few people that would like to ditch the stock exhaust!
done little research on this engine and it's not really a bad engine. they run super smooth,but it does have some bad points about it. plastic cam,rockers have known to crack and belts have gone bad too. I like the front exhaust setup. that would look cool on a little custom built bobber bike with the exhaust coming off the front of the engine.