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found this online: not sure for the year model, but i doubt they changed it much. 14:38 16:36 19:34 21:32 23:30 22:25

Oh and it's a 40mm axle. Sorry I missed that question. And although I've bought a sprocket already, there's always the liklihood of changing down the road, so ill look for the individual gear ratios.

Hey guys I put in the tire circumference, assumed about a 7500 rpm redline, and the 14-30 sprocket ratio into a calculator and it will theoretically run out of gear around 115-120 mph. Figured this was probably about the right ratio and went ahead and bought a 30 tooth for a 520 chain off of the...

Thats definitely another thing we've been thinging about. its a 2 stroke. id really like to run the expansion chamber all the way behind the seat parallel to the axle, but idk how this will effect the engines ability to perform.

Thanks for the link. So if I kept the 14 teeth engine sprocket, and purchased a 520 30 tooth axle sprocket according to the chart I would be at a 2.142 ratio. A few questions: Is this considered a long ratio? about where would mph range would i be looking at? Also, am I safer staying with the...

Very true. These are some of the pictures from before we started and after mounting the engine today.

Thanks, appreciate the help! I dont know much about gear ratios, but I figured the 250 would have way more torque than I could use, so i had just assumed i would want something near 1:1 to keep it from going through all 5 gears as soon as i hit the throttle. With a 17 tooth engine sprocket do...

Hey guys, me and a buddy just picked up a 2000 ktm 250exc 2s and are in the process of tearing it apart and mounting it to chonda kart he used to race. Anyway, today was a big day for us as we built and welded the entire motor mount. The next clear step is to find a decent gear ratio and get...