Originally posted by nmtr13
I My question is how do i know if i need to replace my piston? My engine runs fine but it has no compression... Also, where can I get (online) a piston? BTW i have an RB concept .12
If your engine, "...runs fine...", why would you want to replace the piston or rebuild it? Why go through that expense if it is not needed? Don't take you engine apart unnecessarily. A good indication for a rebuild is difficulty with tuning and idling.