Honda Spree and Elite 50 Forums

I'm thinking about a winter project to replace my stock UK gearing with some stock US gearing. The transmission case has AF05 but there are some variations between the European & US versions so I'm not 100% sure that US gears would fit. From looking at the Wiki, the NB50 '85-87 ratios are 11.097:1 When I checked my final drive ratio I got well over 12 turns of the clutch bell to 1 turn of the wheel so I'm thinking that part of the UK restriction is in the trans gearing.

Here's the link to the Wiki:
http://hondaspree.net/wiki/index.php5?t ... ion_Ratios

If anyone has a stock 85-87 in pieces, would it be possible to get some measurements?
Thanks