Electric Dirt Bike Test#3

New version with A123 lithium batteries. Bike is 50 lbs lighter and has 27% more energy than with sealed lead acid batteries. Gearing has been changed to allow 50 mph top speed. Plan for first tests in the dirt by mid-March 2009.

360 degree wheelie courtesy of co-developer Josh Bender.

The bike is a 1997 CR125 converted to electric power. This is a self-funded project.

Category:

Science & Technology

Tags:

• electric
• motorcycle
• dirt
• bike
• CR
• 125
• a123

[TheMarcelwuest]

Hey, nice Project.

Could you please give me some information about how you managed to run the Perm PMG 123 at 90V DC.

It would also be very interesting to me, which explicid motor controller you are using. Thx a lot, greez Marci

[smorrismlbco]

We used an Alltrax 450 A controller which is limited to 90 V. You can run the motor at this high voltage if you don't overheat it. It's all about cooling.

[EBIKE100]

Is this a hub motor or a chain drive assembly? Thanks and well done.

[smorrismlbco]

The motor is a Perm PMG132 mounted in the frame. There is an intermediate chain reduction and final chain drive.

[littlenfmx]

Would you sell, If so.. how much for?

[smorrismlbco]

This is a one-off prototype and isn't ready for sale. If you have an extra $20K maybe we could talk!

[ramouni100]

Mdr

[ThalassTKynn]

Very nice. Does it go better on the dirt now?

[moparbrent760]

Nice!! The wheelies are different Huh? The whole balance and all of the bike.. I saw how you located the batteries. Pretty close to where the motor was right?

[hitmanzkilz]

very cool bike, but completely defeated the purpose of an electric dirt bike when it is chain driven, belt drive=silence

[Maxor90]

i wanna go :P

[TheAalen]

Lol he fail!

[zeama77]

dude did you really fall? i hope your okay that scared me xD

[importfilta]

@smorrismlbco How do you cool it?

[sfproductions97]

How long does the battery last?