Hello, everyone,,I have an OS 21rg with a big problem: its a plugaholic, I have tried the os5 os 8 mccoy m8, and no matter what I do the plugs keep burning at the rate of one or two per tank. whether It is too lean or rich it does not maitain a long time as it should, also there is only one shim in the engine. i use it in a ofna buggy and I think i am getting way too much compression because the car will go over 50 MPH !! no matter what I do.

PLEASE HELP!!!!!!!!


thank you for your time and help