I recently put together a dio motor with a 51.5 crank and 52mm piston. My piston is about .5mm below the deck. And I am getting a compression reading of 95 Psi. I tried to sandpaper the head a bit and got up to 105 (untill I was a ball of sweat!!)My concern is that I need to run a 39 pilot jet (for a OKO 28 carb)with the stock needle at it's leanest position (highest e clip position.) I hear a 55 pilot jet is ideal. If I run that the moped is very sluggish and "garggly..." I was told this is due to low compression. It runs fine as it is, but I wonder if I should keep on cutting the head to attain the 130-150 psi compression? Or should I just be happy how it is?? I would say the motor runs strong, but I am not too sure, because I am new to this world of mopeds.... Any advise would be greatly appreciated!!! Aloha. Bob.
Save gas and have fun doing it!!!
Posted on Jul 22, 2004, 9:30 PM from IP address 69.75.15.63
