Jay64 wrote:Hey man, I need some technical help for building a racier ebike. All the ebikes I have built have been hub motors. I want to use one of my regular motors for this build. One question I have been having is how to get a drive sprocket on the rear wheel while maintaining the original pedal gears on the rear wheel. I want to try to get it on the opposite side of the pedal gears. Do I need to get a special rim? I've seen a few different builds, but I'm not sure if I am following exactly what they are talking about. Maybe I am just misunderstanding them. It seemed like they were talking about a crank sprocket or freewheel. But wouldn't that be the the ones by the pedals?
If we get our bikes together and you want to head out there, I can take your bike and give you a ride out there. You might have to fly back home though because I plan being a couple of weeks before I come back. But I would be able to bring your bike back with me when I do come back.
You wont need a special hub although i would advise a double walled higher quality downhil mtb type rim
There are two different ways to accomplish the freewheeling lefthand drive... You will be using a 'freewheeling no regen setup i presume'? If thgis is the case (and it is with every chain drive i have seen) you will require it to have a freewheel, now this can be on the rear hub (not what i would advise) or secondly have a freewheel on the motor end of things (adviseable) The later has less 'free play' when you accelerate from a corner for example after coasting, the rear freewheel option tends to have to spin up more before you get drive, very noticeable difference (i have a bike with both so can compare LoL
) To accomplish this you will need some form of disk brake sprocket adapter, this as the name suggests allows you to bolt on the adapter to the hubs disk brake mounts, to the adapter youbolt your rear sprocket, simple
sells them, there is another supplier also i forget the details, you need a facebook account to contact him so I never bothered suffice to say, his kits are flash and were made and primarily directed at the ICE crew looking for something better than the 'rag connection' that comes with the China Girl 49-66cc kits, but work for electric just as well... You will then have a freewheel on the motor end of things. If you wish to go the freewheel on the hub arrangement, left hand thread freewheels are available they are cheap and nasty looking things with HUGE amounts of sideways slop in them, google or ebay "southpaw freewheels" should turn up a few hits, thats how i got onto mine (after Miles
IIRC told me about the "Southpaw" label) Rest is pretty straight forward for someone of your knowledge and skill, make sure chain is aligned with appropriate tension and your ready to rip...
All the best...
p.s @SoSauty...looks like you got double the lean angle our Luke gets on his slicked up crotch rocket GSXR1000 hahaa