Originally Posted by Sneakyweasl

My p5 is toast after only 2 gallons compression is nil and the front bearing leaks very bad. When the piston and sleeve were pulled I found scratches on the back side of the piston and sleeve directly on the exhaust port. I have been very meticulous about air filter maintenance and have never even seen a speck of dust or dirt on the secondary filter. Any ideas on the cause it was not a glow plug element changed the first one after break in and im on my third one now. I'm hopping a polish and a pinch will get me back up and running with a new front bearing. Any help would be appreciated. Oh I run a Mugen MBX6. thanks