" Hi everyone.
Been reading and book-marking all i could find about ev conversions on motorbikes since i had a test drive in my buddies BMW i3 electric car.
Instantly wanted one, but my wallet just isn`t up to it.
So a Zero or the like would be nice as well but frankly ... still kind of expensive over here in germany.
A conversion on the other hand might be just within reach. Especially if it stays within the envelope of what i want it for.
Having build my own design electric rc planes for at least 30 Years i found that there is hardly a difference between an e drive for motorcycles and planes apart the difference in power and Voltage, as well as the MOT ( i belive that is what it`s called - it is the "TÜV" over here we have to deal with) to make it street leagal.
Having a quite capable OD-DIY cnc shoud help somewhat as well. If only to remaind me that i managed that as well .
So-
The Goal:
Having had my fair share of big/heavy and powerful motorbikes i always enjoy riding my trusty 81`SR500 that i own since 28 Years.. lately i had more and more been leaning towards smaller and light(footed) bikes to ride the small country roads surrounding my village. Might be an age thing but i just do not need a big travel bike anymore.. Sold all my big ones, leaving me with my trusty SR
So i want a motorbike to be used like your regular scooter, bakery, shops, lake, quick trip to city, commute to work (35 km 21 mil one way - i can charge there) or a run around the fields for an hour.
So highway speeds not strictly neccesary but it should top out above 100 km as not to be a nuisance to other drivers and certainly i do not want to get overtaken by trucks all the time (90 kph).
In order to get all over town i need aprox 80-90 km max distance ( slow riding) with onboard charging if i go over half of my amperage...
What i really want is a bike that has a bit of "grunt" - no need to out-do a 750 but being used to my old SR, acceleration should be within say 7-8 ish sec to 100 kph.
So reasonable preformance no outstanding needet.
The bike:
As stated before i want a nimble, smallish bike and i do prefer your typical sportbike. So instead of sourcing a say 600 or even 1000 cc donor bike to end up lighter when done, i figured to use a small type that may gain a few kg in the process but still stays lighter in the end and than the other way.
Most conversions of bigger bikes end up somewhere in the neighborhood of 190 kg whereas a tiny bike could end up say at 150kg. (assuming lifepo4 batts).
As there is no need to reinvent the wheel i figured i use following items:
-Me1115Motor
I was hoping to use 25S72Ah Lifepo (these:
https://www.ev-power.eu/index.php?cu...disc&anid=4490 ) which would have been perfect just to find out today that these had been discontinued. Perfect sice match and capacity easy to mount ... bummer.
-svencon controller
-throttle tbdt.
-kp 1200W charger for weight reason... maybe the 1500w one - depends
-most likely to run a seperate 12 V system as it is required anyway to make the bike street legal.
The plan:
Already got the donor bike and de iced it last two mornings.
Wanted to make templates during the course of this summer ... need some time to save up some money.
Try to do the build during the early winter and build the bat. in winter. too..
comes spring i would like to be ready to test it and make it street legal by summer.
Most likely this won`t work out as already now i need to completely change my battery setup which would have fitted perfectly.. grrrr.
Anyway that `s it for the moment, if anyone has a source for this bats, preferrably in EU...let me know
Some pics as well:
The bike with all needet and all ice removed but with tank is 79 kg as seen in pic its 72kg "
Originally Posted by bigpie
"