According to a guide on the internet, and my haynes manual, the bike is in TDC when the "in" and "ex" mark are flush on the 2 sprockets in the head of the engine.
When I turn the crank manually until the T mark lines up with the notch in the little inspection hole, the "in" and "ex" are upside down and not flush.
If I rotate the crank again until I see the T, the sprockets are in the same place, upside down.
I'm checking my valve clearances and not sure which to pay attention to, the T mark, or the "in" and "ex" being flush with the top of the head?
If it is slightly not TDC will this make a big difference to valve clearances?