OSET Electric Trials Bikes

Hi, I am using the motor from a Oset 20R for a project bike (started as a kart but after getting the motor it is too perfect for the bike project). I need to reverse the rotation of the shaft, which is easy enough but throws off the timing. Does anyone have info about timing these motors? Thanks

Hi I recently bought an Oset 16.0 36v (second hand) for my 7 yr old son. I've tried it out myself in the back garden but it goes quite slow (with power up full) up a fairly gentle slope (not much more than walking pace) with me on it (I'm about 80kg I guess). I've charged the batteries and they take charge ok. they are all reading 12.7 volts. Is that too low, i.e. are the batteries done? I guess they should all be reading about 13 v if they're in very good condition? Other than the batteries being low is there any reason the bike would go slow (chain seems to be ok). THere is some resistance when I push the bike; I can feel the poles of the motor; is that norm…

Anyone tried these on a oset? http://www.boost-bikes.co.uk/products/16-20-lite-36v-oset-battery-pack-and-smart-charger?variant=3135462019 Really tempted for my sons bike to improve ride times

Hello Just got an Oset 20 for the kids. It has standard wheels and tyres. What pressures do you run at? Looks like no chance of running them at normal trials bike pressures. Thanks Dave

I have just picked up a used Oset and notice the motor says 900w which appears is the same as the 20 lite. Are these out of the factory like this or could it be a upgrade? Oset spec suggests 800w is normal. Cheers

The charging block for my Oset occasionally makes odd noises when plugged in, almost like there is something mechanical inside it grinding away. I'm pretty sure it's always done this, but not positive. Normal?

My 8 year-old son enjoys trials events on his 36v 20" Oset but also has the desire to "go fast". So, is like to get more speed out of his bike. I know that larger rear sprockets are available but have not found smaller sprockets. Also looking for 20" street tires. Any advice or leads are appreciated.

I had Paul Master replicate his build on my 20.0 and it rides like a dream now. I had bought a first generation 20.0 that was unrideable. I even got a new controller from OSET and it helped, but still was not any fun. Paul is known in our trials club as the EcoTrials guy because he made an electric trials bike from a Montesa a long, long time ago. Then he did it with a 20.0 about 2-3 years ago. He uses an Alltrax controller that can manage huge amounts of current (designed for a golf cart) and is programable, in tandem with a Magura throttle. The mapping is so tame and predictable off the bottom that I can perfectly control and balance on turns now, and it ramps up to…

Hi has anyone got a wiring diagram for a 2009/10 12.5 oset please Thanks

Hello, Anyone here has positive experience in recovering a LiPO batt with 1 defective cell? I read you have to charge it in NcCd function without the ballance connector. But I really have no tension at all in the dead cell. The dead cell is not swollen.... Shall I try or just recycle it.... Greets

Looking for advice on what petrol generator will power the charger for my Freeride E. I know it's not a trials bike but there is so much knowledge on here regarding E bikes. So I want to take the bike to my local MX/Enduro bike park, they don't have electricity so I can't recharge between rides. I can easily get 60 mins+ continuous ride time when I am not gassing it MX style so my plan is ride for a hour, have lunch and recharge the bike, then ride for another hour, and repeat. The charger needs 13 A steady output to fast charge, and 10A steady for normal charging. I found this article that talks about charging the battery with a petrol generator on the KTM bl…

Hi folks, Sounds like the motor bearings have failed on the wee boy's Oset. Anyone out there replaced them as advice would be welcome. Thanks in advance.

My daughters 20r seems to have developed an annoying intermittent fault, she has complained that it has seemed to very occasionally lose power for an instant and we put this down to a dodgy on/off switch (now renewed). After a very wet and muddy practise last weekend I washed the bike off and dried it but found that the bike's throttle was sticking (it snapped back but the motor kept going?) After checking all the connections and cleaning them and putting dielectric grease on them the bike had no power, it ran as if the battery was flat before coming back to life. This has happened a few times now - Any ideas?

After reading a few other posts on this topic I understand there are a few niggles with the oset throttle control. My problem though sounds a bit different to others who have posted. Having adjusted the 'throttle response' adjuster throughout it's range; when the throttle is chopped the bike continues to pull or drive forward for anything between 1 and 4 to 5 seconds depending on 'throttle response' adjuster setting. Having had the oset 12.5 with an ordinary petrol engine type throttle response my 5 year old has found his new bike uncontrollable and to be honest unrideable. Can anyone confirm it has a fault or are there adjustments elsewhere not listed in the manual.

Hoping someone has come across this and found the cause. 2015 oset 20R one day working perfect, the next on turning the throttle there is a momentary lurch , wheel turns slowly about a half turn, then nothing. Lights show full charge, batteries are charged and balanced and showing 48v at the switch. I've tried unplugging each of the controllers, speed power and throttle response as suggested elsewhere. No difference. All connections appear ok beyond that, stumped!!

Has anyone done it yet? I have a 20" and it is absolutely amazing. It has way more power than an 80cc bike, great suspension and light weight. For my previous electric bike builds I have a bunch of 6s1p and 3s1p packs. Oset US turned me on to a drop in solution that uses Lifepo4s packaged as a direct replacement for Osets. They even sell them in a kit with batteries and charger. They are very cool as they have a battery management system built in so they are as easy to charge as the standard Oset SLAs. They list a kit for 24v and 36v and will probably have the 48v soon. http://earthxmotorsports.com/products-page/etx-batteries/oset-36v-kit/ They are more expensive that H…

My sons Oset recently lost all power, the problem was traced to the relay mounted under the rear fender, there was voltage across the two small spade terminal wires entering but nothing on the main switch wires and no audible "click" when switching on. Although this appeared well protected being shrink wrapped in plastic and housed in a velcro pouch, on removal it was found to be open to the elements where the wires entered the wrapping and I was surprised to see that the contacts for the switch were visible through a large opening in the relay body, I.e open to the elements themselves. Wd40 sprayed into the relay and it worked again. I have ordered a replacement incase …

Boys Osets ready for Xmas day . 2014 16r and a brand new 2016 20r. Can't wait

Hi guys , just brought my 2 sons for xmas oset bikes, 16 r and a 20 r, and was wondering what is the law about riding them in the forest, I've looked on the forestry commission site and can't find anything , basically I will ride my mountain bike and I will try and keep up with them lol

Hello guys, I bought a new "upgrade" chain kit for my 2011 oset 16". So bigger chain. The shop confirms me its OK but I doubt that there is to much play between chain and chainring. The owner isn't in till next week so I cant double check with him. Could any of you please check if it is the same on a new model Oset 16"? See pic and movie https://youtu.be/nnnaTCFe8kc Big thanks!