May 25, 2010
Considering that the engine definitely picks up power at 30+, even with 19.5 grains I am going to go lighter My next trial with the gearing is to bore the stock weights with a 3/8" drill. Right now the center hole is 8.8 mm and a 3/8" is 9.5mm. The OD of the brass is 11 mm. Since I am only using 3 weights I will have two sets with one being lighter than the other.
I also measured my belt. I presume that it was the original belt on the scooter. Has 2000 stock miles. My belt was 15.3 mm wide. Stock width is what 16.5. Time for a new one. Am I right in presuming that the increased width will increase the tension opposing the contra spring. More rpm?
I don't presume to have that much knowledge about 2 strokes, I think the 50cc scooter is the last stand for two strokes in the USA. What I do understand is math. I use it every day in my business.
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