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Matt Monson Matt Monson is online now
gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,653
Quote:
Originally Posted by 1966912 View Post
Chart showing 902/1 with 6:29 R/P swap in red line...
Two problems with that.
1. The 902/55 has the vowel gears AND the 6:29 r/p. It's the same hill climb set up they used in the famous Berg Spyder

2. Your shorter r/p doesn't close up the rpm drops between the gears. The gap between an E and an I is much smaller than the gap between an F and an M, and so on through the stack. So while changing the final drive will increase your mechanical advantage, and therefore your acceleration, the closer ratio option is generally the better approach. That's why the factory did it that way.
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Old 03-20-2015, 09:41 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #18 (permalink)