Top end question

[Jferdi03]

Check the squish before ya start the next one. Just double check and make sure the piston don't hit the head.

Whats the best way to do that? Probably a dumb question lol

 

[Wrench]

Whats the best way to do that? Probably a dumb question lol

I'm a 4 stroke Whizzer M/B guy,
Since I'm not a pro with 2 strokes maybe @Street Ryderz or another 2 stroke master will chime in and explain SQUISH to you.

Basically ya take a piece of solder wire and put it on top of the piston, put the head on and see how much the piston squishes it down to measure the piston to head clearance. This measurement is taken to let ya know how much material can be shaven off the head or cyl deck to achieve the maximum compression.
Like I said it's better a 2 stroke pro explain it to ya. They can give ya the correct squish measurement specs.
You might want to know if your squish is too big or too small.

 

[Street Ryderz]

Wrench covered it well, the solder atop the piston as Gary has shown many times here is probably the best way for most, the gap at .7 - .8 of a mm works best with these.