I searched for a post about adjusting the 175 cam chain tensioner but didn't find anything. I just put the motor back together (ring gaps were good, as was piston clearance after checking again, Thanks JB) and I just set it like the Cb750, by going about 15* ATDC and tightening it there. I couldn't remember if the 175 was one of the ones that was supposed to be set running. The engine sounds relatively quiet and seems to run fine, anyway. Thanks, Jimmy