I have just checked the compression on my sons LT 80 and got a reading of 135psi is this good or bad? I have some MODS done but i have not skimmed my head yet . does anyone know how much to take off and is my compression high or low?

 

it sounds a little on the low side if its getting hard to start its time for rings we usually have 150.00 were stock dont now about the shaving part.

 

For stock 135 isn't bad.
Shave .020 off your head.

 

thanks for your info lt80