I decided to check my valve clearance since I have not done so since I got the bike. I would like to know if there is more than one mark that can be observed through the sight glass on the alternator side of the engine. I have pulled the timing belt covers and when the cam timing marks are lined up there is a drilled hole visible through the sight glass. Is that drilled hole TDC and is there more than one mark (I have found only one)? Thanks.

there are a total of 8 marks on the flywheel. 2x TDC, idle firing, full advance and two reference marks for the pick-ups.

G.

Thanks for the info. I was able to determine that there is more than one mark Unfortunately, they all look the same. I checked the valves on the rear cylinder with it at TDC and the front cylinder at rock point. Same with the valves on the front cylinder, that is with the rear cylinder at rock point. It appears that one valve (rear exhaust) is correct and the rest are tight on the opening rocker and loose on the closing rocker. Does this sound reasonable?

Hi Maico 88,

this sound normal. often the closers are not set properly, resulting in bouncing valves while landing on the seat. this causes slightly deformation of the valve seat and the valve moves further outside towards the opener rocker.
try to get the closing rocker close to zero. the bike runs more quiet and needs less adjusting. don't forget to check the play annually.

Bertus

Thanks. Guess I will get busy measuring and order shims.