420 12T 17mm Motorcycle Front Engine Sprocket Compatible with 125 140 150 160cc Honda TaoTao Loncin Roketa Coolster Sunl Lifan Chinese ATV Quad Dirt Bike

Went from a 13T front sprocket to this 17T on my daughters 110cc Coolster…. It went from high rpms at 15 mph to 22 mph and still has plenty of take off power

I used this for my 2019 Honda Grom, fits good. I got the 14 tooth, if your looking for stock gearing it's a 15 tooth. Going down to 14 gives you more torque but less speed. Stock, my Grom could go about 68, with the 14 tooth I was topping out at about 59. I also tried a 16 tooth, topped out at about 72.

Gave the bike a nice little power jump well worth money

Worked on my Chinese pit bike

I received the wrong size, but luckily it still worked much better than expected. So I think it actually works in my favor, less loss of top speed.

I did receive the wrong one at first but it was immediately replaced and all measurements were accurate. Fit on a little 90cc Chinese atv

The pictures show a .7 inch inside hole in the sprocket. THIS IS NOT TRUE. It is closer to .5 inches. See pic. NOW I HAVE TO GRIND THEM DOWN!!!!! Not happy. UPDATE: the screw holes that say they're 5mm wide take a M6 screw! THESE GUYS ARE CLOWNS.

I used this on a 125cc Coleman mini quad to help it on hill climbs. The smaller front sprocket helped a bit, which is all I was looking for. Install was simple.