# Electric (small) dirt bike and torque

**URL:** <https://community.electricforum.com/t/electric-small-dirt-bike-and-torque/1023>\
**Category:** Scooters, Bikes, Sagways\
**Created:** [October 27, 2008, 3:03pm UTC](https://community.electricforum.com/t/electric-small-dirt-bike-and-torque/1023 "2008-10-27T15:03:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Orphee](https://avatars.discourse-cdn.com/v4/letter/o/ad7895/32.png) [@Orphee](https://community.electricforum.com/u/Orphee)\
**Post date:** [October 27, 2008, 3:03pm UTC](https://community.electricforum.com/t/electric-small-dirt-bike-and-torque/1023/1 "2008-10-27T15:03:42Z")

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Hello everybody !

I modified a “Razor MX650” : put a brushless 1000W motor (1800W max) and changed the acid 36V battery by a 48V LiFePo4 one.  
That’s was working great (30 miles/h=50km/h) except … razor is much more near a gadget than a real motorcycle !  
So I bought a Kawasaki Kx65 and put battery and motor on.  
That’s works too … except no torque and speed too high, even I put maximum gear ratio (48:12).  
So this is the reason I’m here: I’m searching better method to reduce ratio (I don’t need speed and reducing by 2 or 3 will be correct. I just need best torque)  
Actualy I’m searching for a “planet gear” reductor who be interesting because not adding gears & chain.  
Have you good idears for this ? others ?  
Thanks and sorry for my bad english.

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**Author:** ![Metallover](https://avatars.discourse-cdn.com/v4/letter/m/6de8d8/32.png) [@Metallover](https://community.electricforum.com/u/Metallover)\
**Post date:** [January 28, 2009, 7:44pm UTC](https://community.electricforum.com/t/electric-small-dirt-bike-and-torque/1023/2 "2009-01-28T19:44:57Z")

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Cant you just reduce the gear ratio? Smaller pinion/larger spur?