65/47 * 1.9 = 2,62
But which motor did you stuff in there? My 13.5T would go up in smoke in two laps with a ratio like that. I'm using the 19T pulleys to get the belts more relaxed, so with a 69T spur and 34T pinion my FDR is 69/34 * 2 = 4,06.
Last edited by bakoo; 05-17-2013 at 04:53 PM.
Reason: I kant spel