EV pocket bike - nameless..

[Glen]

howdy

both of the sprockets have exactly the same size so motor RPM translates to wheel RPM.

where only at 24v at the moment so if the motor has a kv of 72rpm per volt that means 1728 rpm on the wheel.

i *think* equates to about 58mph or so. and about 87 at 36v but ill be changing the ratio to bring it down to about 60mph when i up the voltage

[Glen]

well heres some vidoes to prove it works extremely bodgy though, havent worked out a way to hold the camera properly and take some good video (had to ride slow so it didnt fall off and get run over XD)

will try find the elusive digital camera and bolt it on!

but yeah, according to the calibrator it only got to 1000rpm on the motor which translates to about 55kmh. acceleration is average, but unlike a gas powered one it seems to pull consistently all the way to its top speed (which i may add is F**KING large) instead of having a power band. which is really nice to ride.

only running at a timing setting of 90 in the video as well to stop the shudders. but afterwards i worked out the setting to cure it, and now it runs at 180 so the accelerations better than the video now.

YouTube - Etek powered pocket bike
YouTube - etek powered pocket bike

the clicking noise at the end of the videos is the bolts in the wheel sprocket coming loose and rubbing. i loctited it and no joy, so ill have to spend some time on that issue.

next job, find a camera and get some better video , then find the 36v batteries and larger gearing to make it into a monster, then world domination! perhaps... lol

oh and before anyone gives me the dont ride on the streets lecture

a) this is on a footpath
b) electric bikes are legal on the foot path

and it must be said, that the ability to flick a switch and just ride off is totally the best!

[Robbie]

How much has to cost to build that thing?

[Glen]

the motor and controller where $600, the rest of the stuff i had already

[Glen]

well been occupied with my other bikes ive trashed this one for a while. but the long weekend has provided plenty of precious build time.

first thing was to finish the new shaft. its my first serious job on the lathe and ive threaded the ends and everything. its come out quite well which very pleased with. no more bent shafts with this setup i hope!

only have to finish the front sprocket as well as my fix for that was quite dodgy... also the back wheel has stripped some threads i think.. might have to do that threaded stud mount if theres enough to hold the stud in. mmm

and tommorow i shall also be using the GP3s / cags fairings as a mock up for mounting them. so ill just buy some cag fairings and just have to bolt them on.

will definitely be bringing it to indy anyway at 24v. be warned the ride is harsh sans fairings haha. you might need to see a proctologists the day after