On Sep 21, 12:56*pm, Dave__67 wrote:
OK, this is somewhat on-topic.

O own a motorcycle, it has a large gap between the 1st two gears, a
popular mod is to replace ONE of the two gears that make up the 2nd-
gear pair, the new gear has fewer teeth.

How on earth can you change the number of teeth on just one gear of a
pair when they are set at a fixed distance?

Dave

This is for a Honda XR650L, very similar engine to an NX650.

All the parts in the trans are the same between the two except for one
gear, and I assure you this does work and there are bikes out there
that have had this mod for thousands of miles.

Dave