You guys are a wealth of knowledge. I have read threads on here until my eyes are bleeding, and still have questions, Hope you guys can help. A little information to set the stage: 2002 heritage softail, with a wide tire kit and the belt is rubbing on the lower frame. I am looking at going to smaller pulleys to get the belt to ride higher off of the frame, and keep around the stock ratio. it has the stock 32 trans pulley and the 70 rear wheel pulley, and a 135 tooth belt and stock 25/36 primary. it has a 240/40-18 rear tire. I have located online a final drive ratio calculator which I have provided the link here to it. http://www.scootersperformance.com/t..._rpm_calc.html
A question to you guys is how accurate do you believe this calculator is?
I am looking at going to a 30 trans and 66 rear wheel or a 31 and a 66 rear wheel, and they both will use a 132 tooth belt according to the calculator.
I have read in threads a few months ago and cant seem to find them again that a change in the trans pulley is equal to 4 percent per tooth, and the rear is equal to 2 percent per tooth, and also read trans at 4 percent and rear at 3 percent. both of these sets of numbers dont seem to me to be the same as the calculator. Also that a tooth change in the belt amounts to about an 1/8" per tooth on the position of the rear axle.
What is you guys honest opinion if a change to a 30 or 31 trans, and the 66 rear with a 132 belt will fit my application with what I have stock on it now? The calculator says it will.
Whew that was a mouth full.
Trying to do the math before I tear it apart and it all be wrong.