No compression can be rings stuck in the piston grooves.In this case just running it for a while will loosen them and give you your compression back.I would suggest getting a manual and going through all the maintanance procedures and get it to run again. A stuck or burnt valve can cause little or no compression also.

 

ATC'S are good bikes!!!


1982 honda bigred
1986 honda 350x with 500 engine
1991 kx 125
07 Arctic cat 700 4x4 (beast in the mud)