If you can get feeler gauges in go for it..... cold setting IN & EX 0.08 - 0.13
This need to be done with mag cover off
Rotate mag until T is aligned with hole on crank case
Dial in your cam inlet opens 28 degrees BTDC inlet close 64 degrees ABDC
Exhaust opens 68 degrees BBDC Exhaust close 24 degrees ATDC
* TDC = Top Dead Centre B= Before A = After
BDC = Bottom Dead Center
While your at it - adjust Balance chain ....remove sprocket cover and mag cover ( mag runs in oil ) so drain oil
Adjuster is below mag and above bottom engine bolt ( internal )