redline2097 Posted February 1, 2016 Author Report Share Posted February 1, 2016 Actually I don't find any sprocket bigger than 11 tooth with d-bore fitting. Do you have any sources or other ways to fit bigger sprocket. Quote Link to comment Share on other sites More sharing options...
redline2097 Posted February 1, 2016 Author Report Share Posted February 1, 2016 (edited) Or is there any possibility to modify this to fit to pre 2015 model: http://2machsmotorcycles.com/?product=jitsie-alloy-rear-sprocket-various-sizes-oset-12-5-16-0-20-lite-20-eco Stock one looks like this: http://www.osetbikes.co.za/shops/index.php/spare-parts/sprockets/90t-screw-on-rear-sprocket-for-12-5-pre-2015.html Is there anything I can do to that rear shock. When adjusted shoft to my kid it is very dangerous in jumps. The rear shock bounces the rear wheel up in the air and front of the bike hits long before rear to ground.So the boy to fly easily over the handlebars in 2-3 meter jumps. The bike doesn't have any shock absorber just the rear spring? Is It better to adjust it very hard to eliminate this? I don't think that bike is front heavy. I can try to put the lipos under the rear fender if that helps... Edited February 1, 2016 by redline2097 Quote Link to comment Share on other sites More sharing options...
gilles Posted March 7, 2016 Report Share Posted March 7, 2016 Hello redline, It seems you are also looking for a more MX use. The suspension of the OSET is indeed way to insufficient. It will always be a bicycle with an electro motor. Have you see the Kuberg special edition? Its on the Kuberg FB page. They will present it end of the year, but they say its 65cc material (14KW) so to powerfull for my 5year old kid :-) All we need is a good decent rolling frame and fit in battery, motor, controller and throttle. Can't be that hard can it? I know a someone who owns a karting, who rents mini supermotards. He has a lot of old chassis of these Polini pantera. :-) https://www.google.be/search?q=polini+pantera&biw=1440&bih=770&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjQ5tnDwK7LAhVC-g4KHVgsAusQ_AUIBigB#imgrc=notB9Cg46k0cCM%3A Greetings Or is there any possibility to modify this to fit to pre 2015 model: http://2machsmotorcycles.com/?product=jitsie-alloy-rear-sprocket-various-sizes-oset-12-5-16-0-20-lite-20-eco Stock one looks like this: http://www.osetbikes.co.za/shops/index.php/spare-parts/sprockets/90t-screw-on-rear-sprocket-for-12-5-pre-2015.html Is there anything I can do to that rear shock. When adjusted shoft to my kid it is very dangerous in jumps. The rear shock bounces the rear wheel up in the air and front of the bike hits long before rear to ground.So the boy to fly easily over the handlebars in 2-3 meter jumps. The bike doesn't have any shock absorber just the rear spring? Is It better to adjust it very hard to eliminate this? I don't think that bike is front heavy. I can try to put the lipos under the rear fender if that helps... Quote Link to comment Share on other sites More sharing options...
redline2097 Posted March 17, 2016 Author Report Share Posted March 17, 2016 (edited) Are you doin cross with the 12,5? any news on the MX10? I maybe switched to early to 16", so stil la bit to big for my son. I'm goin to buy the saddle now to get hem higher up. http://youtu.be/puCuu77UuHY Greetz Sorry I didn't notice your comment at firtst. Yeah we are doing cross with 12.5, also a little bit FMX, enduro, snowcross and supermoto too. In these videos my son is between 2.5 to little under 3 years old. https://www.youtube.com/watch?v=fXcchslTVU8 https://www.youtube.com/watch?v=R9Kq3wrVWXk I think we are now going to upgrade the motor to RV-120 regular so we can output max 10kw. Something to beat his friend on karting track. His friend are driving with petrol powered 49cc 2kw minimotos. I looked at the kuberg but its seat height is 63cm compared to oset 12.5 39cm. I thing we drive 2 more years with this "overpowered" system. Edited March 17, 2016 by redline2097 Quote Link to comment Share on other sites More sharing options...
gwhy Posted March 17, 2016 Report Share Posted March 17, 2016 http://www.raffebikes.com/ 1 Quote Link to comment Share on other sites More sharing options...
redline2097 Posted March 18, 2016 Author Report Share Posted March 18, 2016 Not much info available on their Web site. I contacted them. The point is that my son is now only three years old and wanting to drive all kind of driving with his bike: mx, trial, Enduro, supermoto. On gravel, snow, grass, rocks.. Anything. I just want provide him what he wants. When he is older he can Focus on certain type of driving. Example here the youngest kids start motocross races at 7 years. Yeah that is the minimum age here you can race. How do you think that rv120 regular or pro could fit with oset? I plan to power it with 60v (15ah). On controller side we can output 10 second bursts of 150 amps. I think this is everything we need. Later when we purchase Oset MX 10 we can add this motor and batteries to it and ultimate compete easily with 50cc-65cc motocross Bike if my boy wants focus there. Is there Any small steering damper to fit Oset 12 order to run without huge vibrations 60kmh on Karting tracks? Or do you think we can go without. I think 55-60 is absolute maximum we ever want of this small bike. With rv120 even I can run it too Quote Link to comment Share on other sites More sharing options...
redline2097 Posted March 18, 2016 Author Report Share Posted March 18, 2016 (edited) Ghwy, I looked one older thread and guy there was saying you helped him to built 12.5 and 16 oset hybrid. How to achieve that, will 16 inch oset tires fit 12.5 frame? I think my boy is growing out of the bike in late this year but 16 is just too big. Am I on right track with this part list: -Oset 16 front fork, front disc, front brake level, front wheel and tire, back wheel and tire? Is there any possibility to add 16 racing front work to Oset 12.5 pre 2015 model or am I only dreaming? Edited March 18, 2016 by redline2097 Quote Link to comment Share on other sites More sharing options...
gwhy Posted March 18, 2016 Report Share Posted March 18, 2016 I think the rv120 may not be very suitable for long term reliability on any off-road bike due to it being a outrunner so it will have to be very carefully protected from the elements to stand any chance of survival , the motor itself would be powerful enough for what you want but the motor would need hall sensors fitted ( I dont think they have them by default ) you will also need to find a good enough controller to drive it. I cant remember to much about the guys oset trials to mx conversion but I do know he extended the swingarm and I believe he changed the front forks for something that had a mx pedigree also fitted 10" mx wheels , and used the stock 16" motor and controller. Quote Link to comment Share on other sites More sharing options...
redline2097 Posted March 19, 2016 Author Report Share Posted March 19, 2016 (edited) Revolt site says: With hall sensors: 335USD. So yeah hall sensors are there. Also they can waterproof the case for me but what kind a protection we are talking about? IF there is weather seeling and I add strong metalplate underneath it, I think it would be good fit? I don't think its going to get any hits over it. Or do you talk about vibrations? This controller is all we need (110A/200A) http://kellycontroller.com/kbs72181e110a24-72v-mini-brushless-dc-controller-p-1315.html Other powerfull lightweight motor recommendations? Do you think we can fit that Oset 16 forks to Oset 12.5 easily? The rear swing is a little bit easier, we just extend it 2-3 inches and it's fine. What if fitted these to swingarm like in PW50, would the rear suspension be much better: http://www.ebay.com/itm/Yamaha-Y-Zinger-PW50-PW-50-Rear-Shock-Springs-Suspension-A-Set-/251809442932 Actually I measured that If we just add custom mounting point to rear suspension I think we can fit the Oset 16 racing shock which comes with Rebound. I think it is all we need. Edited March 19, 2016 by redline2097 Quote Link to comment Share on other sites More sharing options...
redline2097 Posted March 22, 2016 Author Report Share Posted March 22, 2016 (edited) I measured the parts of Oset 16 and they will fit the bike. Instead of 10cm rise on seat height, this mod just adds 5cm. So my boy can start one year earlier to use 16 inch wheels, awesome. I tried with 5cm wood piece underneath swingarm and 10cm wood piece underneath the front wheel and it's just about right height to my son. He can firmly stand with one foot in the ground and can support the weight of the bike. I tried to get my son to 16.0 and it was WAY too high for him, neither of legs can't reach ground. I think the main things to modify oset order to drive mx with this are: front fork with rebound, rear spring with rebound and bigger wheels. Those 12 inch wheels are just too tiny and they will pick every groove on track. So whats planned first (motor comes later): -16.0 racing front forks, wheel, brakes -16,0 racing back wheel, back spring with rebound -7-10cm lengthen to swingarm I think this will be awesome bike to use on enduro, trial and mx. I give the boy get used to the bike before I add more power. But power increase is coming too with more lipos added. Keep in mind this bike has allready twice to power of Oset 16. https://www.youtube.com/watch?v=JARhush4W48 Edited March 22, 2016 by redline2097 Quote Link to comment Share on other sites More sharing options...
redline2097 Posted March 22, 2016 Author Report Share Posted March 22, 2016 Is revolt 120-pro good for using with bike like this, how about the cooling? Would any of reasonable powered 4-10kw hubmotors fit Oset 16 backwheel? Quote Link to comment Share on other sites More sharing options...
redline2097 Posted May 4, 2016 Author Report Share Posted May 4, 2016 Frame mod is now complete, looking good. Now planning for motor upgrade, something between 5-8kw 15-20nm would be good. Any other recommendations than Revolt 100 / Revolt 120-short? Quote Link to comment Share on other sites More sharing options...
gilles Posted May 13, 2016 Report Share Posted May 13, 2016 Owkay special :-) Buying an Oset 16 was to easy? What did you modify to have more power? I think this will be awesome bike to use on enduro, trial and mx. I give the boy get used to the bike before I add more power. But power increase is coming too with more lipos added. Keep in mind this bike has allready twice to power of Oset 16. Did you change something to get rid of the on/off. Mine has it really hard and is irritating when I make him do low speed exercises... Greetings Quote Link to comment Share on other sites More sharing options...
redline2097 Posted May 14, 2016 Author Report Share Posted May 14, 2016 Oset 16 was just too tall and saved about 500 euros for converting Oset 12.5 Eco to 16 racing. I have Kelly Controller added to motor and it pulls 50A with 40volts lipo pack. So 2000 watts of power. The on off throttle is gone and I will tame it with throttle tamer so these two scenarios work at the same time: A) When slightly turning the throttle acceleration is very smooth When turning throttle fast it Accelerate like a beast. My kid can do 20 meters wheelspin on sand with it. Quote Link to comment Share on other sites More sharing options...
gilles Posted May 19, 2016 Report Share Posted May 19, 2016 Ahh that sounds good :-) In corners he's ok but on the straights the speed difference with the KTM's is to big. haha Whats your running time? 10Ah? You got info which Kelly controller I need? Tried the Revolt already? Is there a good package with +/-2kw: motor+controller. I'm lost in all those China offers :-( I would try and install it in a pitbike chassis.... greetings Quote Link to comment Share on other sites More sharing options...
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