KX125 Primary & Trans Ratio's

[Dan Davis]

Hey guys,
I am helping out a fellow shifter kart racer who has KX125 power. He is looking to purchase countergears for road racing and I am trying to tell him the best choice for our type of racing. Can anyone out there tell me what the teeth count for the Primary reduction ratio is on a mid 90's KX125? I am also looking for the count on the mainshaft 1st gear, and mainshaft 3rd & 4th gear. I key this info into an excel spreadsheet to aid us in gearing for different tracks.

Thx for any assistance,
Dan

P.S.- If anyone would like to have this spreadsheet, I would gladly e-mail it to those interested. I think it could easily be used for bikes too.....key in drive tire circumference or diameter, final drive gear ratio (teeth), trans ratios (teeth), and RPM min & max values. It tells top speeds at the RPM limits and gives chart of effects on speed with various gear changes.
Please send me a personal message with you e-mail address if interested.

[FPMXer]

Here is the tooth count on the 99 KX125 or rather the link. http://houseofmotorcycles.bikebandit...125L1%29US.asp