How far does 1 tooth move the mark (sometimes if everything is lined up perfectly as you tension the chain the cams rotate) which can leave you a tooth out
Don´t know the 650 specs but on Z1/KZ900
15 tooth on crank and 30 tooth on cam sproket = gear ratio 2 to 1 = 48 degrees (2 tooth) on crank are 12 degrees (1 tooth) on cam sprocket.
As hardrockminer supposed, your TDC is 5 degrees advance on the crank = 2-3 degrees on cam = no problem.
Without a degree wheel and adjustable cam sprockets you can´t adjust the cam chain wear/stretch.
