Quote: not a typo it was a true 10-1 down in the hole .010,.020 with 79.5cc chambers NOT ABOVE THE DECK.From the factory chambers were 88cc, closer to 8.2-1 even though advertised at 10.5-1. This was a 70 date coded HP 383 Motor.
Something does not add up , to get 10.0 with 79.5 cc chamber the piston HAS to be poking above the deck .020ish, below the deck that much the chamber needs to be near 73cc .
