Engine Size Cc????

[BABU Racers]

Is there any #'s on the cylinder or cases of an Apex DRR engine to identify what cc the engine is??

I dont believe there is. If its a 90 its a 77mm jug inside bore is 52 which is just a hair over 2 inches. Can you explain what you have a little better maybe I can help.

[BABU Racers]

I bought an engine for another machine I was going to billed. I was told it was out of a 90cc apex. I do have it on the bench so I can get into the exhust port and measure top of piston. its got 140psi of compression. so I didnt want to tear into yet

thats not bad compression. good choice for now lol. run it this summer then hone and replce piston and ring and then go again.