I want to get a smaller front sprocket for my daughters Jetmoto 125. It doesn't have enough power in the sand. 3rd gear is useless.
Is it the same as a Honda TRX 90? I cant seem to find anything online.
What size is the stock one?
Any ideas on getting more power out of this thing? I have the upgraded pipe, carb, K&N filter, and re-jetted and still needs more power.

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'03 KFX 400
'08 KFX 450
'05 Kazuma Mini Falcon 90
'07 Jetmoto 125

There has been a few threads on this topic. Im not sure if anyone ever found a replacement sprocket. We dont use 3rd gear in the sand on our 125. Like you say it is useless. I read somewhere here that the 2nd to 3rd gear spread has something to do with adding reverse to the engine.

Ive got one more hop up item to bolt on to the 125. Its a oversize cylinder and piston. I think it makes it a 140cc. Not sure if it will pull 3rd gear in the sand but it couldnt hurt. I will try and get that bolted on this week and see if it helps any.

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07 Jetmoto 250 Sport
07 90cc Mini Ute
06 Jetmoto 200 Enduro
06 Jetmoto 200
06 Jetmoto 150
06 Jetmoto 125
04 Yamoto 150
01 KTM 400 EXC
92 WR 250
91 CR 250
88 YZ 80
85 CR 500
83 XL 600
82 XR 200
79 XR 75
79 Odyssey
73 Bultaco 360
71 Rickman Montessa 250
70 Rupp Enduro
69 Honda 50

wouldnt raveway have sprokets, and try smaller tires...maby

I'd consider doing the piston and cylinder, do you know where to get the parts?

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'03 KFX 400
'08 KFX 450
'05 Kazuma Mini Falcon 90
'07 Jetmoto 125

I would either call Eugene or John at Jetmoto and see if they have it. I am hoping to try this tomorrow on mine.

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07 Jetmoto 250 Sport
07 90cc Mini Ute
06 Jetmoto 200 Enduro
06 Jetmoto 200
06 Jetmoto 150
06 Jetmoto 125
04 Yamoto 150
01 KTM 400 EXC
92 WR 250
91 CR 250
88 YZ 80
85 CR 500
83 XL 600
82 XR 200
79 XR 75
79 Odyssey
73 Bultaco 360
71 Rickman Montessa 250
70 Rupp Enduro
69 Honda 50

Do you have a phone number?

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'03 KFX 400
'08 KFX 450
'05 Kazuma Mini Falcon 90
'07 Jetmoto 125