I'm posting this info in response to a question regarding the gear ratios' of this 5 speed transmission that I have been unable to find any official or unofficial documentation for. I decided that the only and best way to answer the question was to physically measure things. I made up a large diameter protractor dial and affixed it to the clutch driven plate, hot glued a couple of bamboo skerwer pointers in position and gave it a whirl. I used the paper clip to allow a repositionable starting point for the dial. A couple of times through each gear gave me the numbers and simple math gave me the ratios' for each gear.

R = 3.69/1
1 = 3.84/1
2 = 2.21/1
3 = 1.39/1
4 = 1/1
5 = .81/1 over drive