I've been inspired by the "Two stroke tuner's handbook" and want to make my own expansion chamber so, I need to know the rpm range of my engine. I hooked my 12 volt automotive analyzer (dwell tach) to a 12 volt battery and connected the spark plug cable lead to the spark plug wire on the ped. My dwell tach only goes to 6,000 and the clutch on my ped doesn't even fully engage until 4,200. Does anybody know what kind of rpm's a Laura m56 spins? I've shaved the head, pulled the bronze restrictor out of the carb, drilled the main jet, and took off the exhaust baffle. Stock speeed was 25 ish, I now hit 32. My guestimation is about 12,000.