Join Date: Aug 2011
Location: Ottawa, Ontario
Effect of timing being off by one tooth
Looking for input:
Back story - Auto CCT failed and one day the valve train got real loud. While stopped at a red light, the bike just died and wouldn't start. Got it home and the cam chain jumped, seized then shattered the exhaust cam sprocket. and the bits and pieces messed up the guides.
Now - Put on a new sprocket, bought used but in excellent condition guides that also came with a cam chain. Also got an APE CCT. With the crank at 1,4 TDC and the exhaust cam perfectly lined up, the intake cam mark at pin #28 & 29 wasn't quite perfect (couple of degrees above the head casting). It actually got a little worse when I tightened the caps down. Buttoned everything up, installed the CCT to just tight and started it. It sounds horrible, so I played with the CCT a little more and it improved, but still pretty bad. Took it for a mild ride around the block then on the highway for a test run. Power is good, no misses or backfires. It is a little harder to start now than it was. I also used the new-to-me chain as I could feel some binding on my old chain on some links. Length and number of links are identical.
Looking for input. Should I turn back the intake cam one tooth and try to better align the marks? I'm afraid that the intake vales are opening and closing a little early and either I'm hearing the pistons kissing the valves or the compression is slapping the valves closed.