Well its a bad news day for me.
It looks like I won't be riding for a while. A week ago my bike had been running beautifully (if a bit rich). But I went to start it and it wouldn't fire. I came home after work and started it. It took a few extra kicks but fired up and ran like normal. It was just warm enough to idle normally when it simply and quickly died. When I went to kick it over again there was no compression.
I checked it a few days later and magically there was compression again and it fired up, ran for a few seconds and stalled again. There was a little rattling in the top end but I thought it was just dry from sitting so long. Next kick = no compression.
Today I took the valve cover off (for my first time), suspecting a stuck KACR. Nope, most of the compression release mechanism seems to be missing!
No weights, no spring, and a sheared pin. There's also some timing chain rub marks on the valve cover. I verified with the previous owner that the KACR WAS intact when he last adjusted the valves (just before I bought it ~500 miles ago). I couldn't find any pieces anywhere in the head and I figure they must have fallen down the timing chain passage. Of course you can't see much of anything under the camshafts, so there's no telling.
It turns over fine by hand, the valves all seem to open and close like they should and feels like it has compression again. The black stuff next to the cam lobe on the camshaft retainer is just some engine assembly lube. But I'm definitely afraid to try and start it.
I'll be taking the side cover(s) off tomorrow to see if I can find the pieces but unfortunately I don't know how many pieces I'm looking for. I've never really seen an intact KACR and the parts diagram is not that detailed.
I'm thinking that even if I find what I think are all the pieces, I should still probably take the camshafts out. And at that point, I might as well do a top end rebuild... at 11000 miles.
I don't know any different but I think its possible that the KACR hasn't worked since the first day I owned it and flipped it in a creek crossing. I remember it being easier to turn over when I was test riding it. I don't know.
Anyway, I'd love your input and ideas. Do I need any special tools to rebuild the valves or rings?