Hey guys me again...
Sachs 504, airsal 70cc, SHA 15.15 car, gianelli circuit pipe.
The night I first got it running with the stock 68 main jet in the carb, I was hitting speeds in the 40s easy. It had a second power band that it would hit with an audible rpm increase. That was with no tuning at all. Fast forward to now. After jetting down I lost speed. So I went back to 68 after trying a few jet sizes lower and higher and I am not getting close to hitting the same RPM as when I first got it running.
I ran a spray test and found RPM drop by the decomp plug and intake. I tightened the decomp and put a new gasket on the intake. Spray test is still giving me an RPM drop when I spray the decomp. I'm assuming this leading to my power decrease. What is the proper ID in the decomp and any ideas on how to get it plugged properly?