I'd like to upgear my Yager. I even know the gears that are in it but I don't know
where to get different ones. You'd think there would be a gear site with info. The
chinese ones allow regearing but there are 4 different types now so even those
are difficult. Some folks on the Eccomodder site have resorted to making their own.
Others have gotten lucky and found a bigger scoot from the same manufacturer and
"borrowed" their gears for an upgrade.
I'm not even sure how they can remain meshed with different sizes. I think you have to
go up on one and down on the other the same amount to keep them properly engaged.
Here's a gear ratio database;
http://49ccscoot.proboards.com/index.cgi?board=transtech&action=display&thread=1265There's a lot of info on that site for 50cc scoots.