There's a right up on here. You need to have the stator/flywheel off. Clutch cover off. -You pull the carbs and exhaust.
-plug the intakes and exhaust
- have a Schader valve in one of the plugs in the intake.
-pump up to 6 psi
- have a low pressure gauge in the other plug in intake.
-watch for pressure drop.
- spray soapy water on all seals, plugs, spark plugs, gaskets, seams, just everywhere.
My description is very vague and out of order. It's Friday and I'm at a shitty party getting drunk.
But if you have half a clue, you can get the idea.