gwhy

HA chain is heavy duty for that size (1/4" (.25) ) I tihnk the oset heavy duty chain is 219 kart chain ( but maybe 0.35), 219 , 35 and 8mm ( maybe someone reading this can check the actual size of the chain ) are all very similar in size but they are not interchangable between sprockets and chain. if the heavy duty oset rear is 68t then you would need a much smaller tooth count on the front to keep the same gearing i.e a 9t front , if they use bigger chain 219 ,8mm or 35 then a 9 up front is the very smallest that can be used with these chains but i personally would not use anything below a 11t , i would always go for 219 chain where possible as its about as strong and as good as you are going to get for the size ( also rear sprockets are very cheap and widely available but you need the sprocket adaptor for the rear wheel ).

A electric motorcycle can carry enough current battery tech to hit a AVERAGE of 120mph for around 30miles, 80mph for around 80miles or 40mph for 120miles. trials bikes are so much smaller so not as much battery capacity can be carried but on the positive side they are maybe 2x lighter than a normal motorcycle also the high speeds are not needed i.e 40mph + so the answer is not clear cut as it depends on how the bike is setup and what battery capacity/tech is fitted and what the average speeds of commutes between sections are.. as regards mud and water a well designed electric bike is less likely to have problems than petrol bikes.

that depends on how many miles and sections are in between petrol stops to how the bike is setup and what battery tech is used?.

You must be very lucky having a back yard ( yorkshire hills ) you can just ride your bike out your front gate and straight upto the hills.. we all don't have that privilege.. you need a car and trailer at least to transport a motorcycle .. some don't have that luxury, if kids want to get into the sport then they need to rely on there parents this is not always practical also not everyone has storage space for a trailer.. there are lots and lots of bmx tracks ( wastland ) all within walking ( pushing ) distance in built up areas that can be used if there was enough demand for it . Of course there is a simple answer you can give , you either promote the sport by any means ( with a passion ) or you don't . I think you may have breathed in to much 2 stroke since the sport became your passion electric can out perform gas .. this is fact, but at the moment there is still the compromise of performance and run time .. and as battery's become smaller, lighter and more capacity ( and this is happening at a much fast rate than petrol engines took to develop to what they are now ) the performance is already there just waiting to be unleashed. so you can ride all day without fear of a flat battery, but I guess you do take a jerry can so you can refill or have do you have a larger tank on your bike and just know when you have to turn around so you don't run out of petrol ? some older people just dont like things to change because they don't fully understand the technology or they just don't see the much bigger picture. the cost to charge 8x 8ah sla cost around £0.02p .. :-)

:-) you didn't answer .. so im guessing that don't like the sport as much as much as you like being a piston head, but thats ok there is a lot of people that share the same views, which is a shame as it will not allow the sport to become more available to more people in the long run with more places to ride ( local and inner city ).

it take one of my 16ah 44.4v batterys around 3hours total to charge and balance this is at 5.5A and only 50% dischargerd : so 8ah @5.5A =3hours to balance charge : edit the bulk of the charging is done quite quick but once the cells come upto around 4v the current starts to drop off this is why the top off charge can take so long edit2: if i crank my charger upto 10A it can still take upto 2 hours to put back the 8ah and balance the pack , so its not linear.. if that makes sense

if the actual charge per pack is going to be 5a then you would be looking at around 4 hours to charge tehn possible 1 or 2 hours to balance

can your charger do 5A per channel or is that total ?

if you what to go the whole hog with a near 100% complete solution then once i have cycled the packs a few times to make sure there are no weak cells i combine 2 packs ( in my case 2x6s into a single 12s pack , you can then use a lifepo4 48v charger to charge the whole battery as one. 99% of all lifepo4 chargers the output can be adjusted for voltage and this needs to be set to 50.4v for a 12s lipo setup or if you are working on a 36v system ( 10s ) then adjust a 36v lifepo4 charger for 42v . this do not balance the cells so I use a cheap bms inline with my battery ( its not permently connected to the batterys ) this then becomes nearly a plug and play charging setup.

never say never :-).. is it the sport you like or only the engine noise , the lovely smell of exhaust fumes and the expense/time of maintaining a gas bike?

I have been using the 16000mah 6s packs for the last 3 months on my commuter e-bike and so far they are holding up well ( peak current 80A , 40cycles so far and still performing like new ), I have 4 packs ( total 32ah @ 48v) and the space taken is slightly more than a 10ah pack from 25c lipos so its a massive saving in space and a massive increase in capacity. they are advertised as 10c (20c peak ) but in real life they are more like 2c ( 5c peak ) so to get best performance from them and the max life cycle use at these levels. because they are a lot lower c rating you also need to check cell levels more often when using them at the peak performance levels never use over 80% of there fully charger capacity and always check cell levels are at safe levels and within spec BEFORE you recharge. I would say for a 16 oset you would need at least 16ah worth of these batterys and for the 20 oset at least 20ah . for a 36v bike i would not use any more than 10s total as im not sure what value capacitors the 36v controller has in them, a fresh 12s is just over 50v and the 36v controllers may only have 50v caps in them. you can never have to much Ah :-) , the more ah you have the longer your batterys will last ( and i dont mean just run time )... but you also need to remember that the higher the ah the higher the power density which means you need to take even more care of your batterys.

the bottle necks for electric bikes are the battery's and the controllers , as you have said motors are nearly about as good as they can get atm and there are good motors and not so good motors and there are only slight differences :-) but basically they are the same in power output per weight.

the laws are there for electric bicycles not electric bikes .. yes you can ride ( legal ) electric bicycles anywhere you can ride a non-electric bicycle.. legal bicycles can only have a max continuous motor output power of 250W and must have working pedals and a top speed un-assisted of no more than 15mph ( these are uk laws, Europe has different laws so do the states and Canada ) but oset bikes are not electric bicycles ... How ever I have been riding my NON-legal electric bicycle for over 4 years ( 35mph @ 3kw ) on and off road without any encounter with the police or any complaints from the public. I also dont know of anyone who have had a problem riding anywhere off road on a electric motorcycle ( the osets are electric motorcycles ) myself included .. just be sensible where and how you ride and you will be fine.

dingle is correct, it will be classed as a motor vehicle and its not really to do with the amount of power or lack of pedals.. But it really depends who sees you, what damage you are doing, how much noise you are making , scaring ramblers or dog walkers .... to whether you will have any problems or not.

could be something simple,, check throttle, ideally swap out if you dont know how to test same with speed pot (dial), check all connections ( throttle and speed dial ),

The smaller versions on the revolt motors 100 and 120 I know to be very good and have heard good things about them so I imagine that this bigger version should be ok.. the smaller versions are all outrunners and by the looks of it the 160 is also a outrunner so for use on a bike that is going to get very wet and muddy you would need to think well about protecting the motor.

sorry I don't have any recommendations for the 12.5 front forks , I have a feeling that they are unique to oset as the size is very small , you may have to modify a set of MB forks yourself to get the correct head angle. They do a better quality fork for the 12.5 that will be lighter but it is quite pricey.

just get a small cheap mulimeter ( around £5 ) thiw swill be good enough for testing battery voltages, you dont what to keep something connected to the batterys if they are nor being charged or discharged.. the small voltmeters are good to have pemently fitted on the bike as it will be a good indication .. i.e like a fuel gauge

the gng will be a much better option due to the mass will be able to get ride of heat better , but as regards power this will depend on getting the correct controller.

if they are the same make and capacity batteries then there is no reason not to buy them. yes you can charge the batteries off the bike . not sure what socket they use i will try to find out .. you will only need 2 voltmeters if you want to monitor the 2 sets of batteries .. ebay sell a small standalone 15-120v dc waterproof panel voltmeters for around £4 each.. you could wire them into the bikes permently ( use a small fuse ) , http://www.ebay.co.uk/itm/Waterproof-digital-voltmeter-DC15-120V-12v-24v-36v-48v-72v-99v-Volt-Panel-Meter-/321547865324?hash=item4addbf0cec:g:hfsAAOSwajVUN5A6 edit: this is the socket that you need http://www.maplin.co.uk/p/maplin-3-way-audio-locking-connector-chassis-plug-fm51f the picture show a higher in count you only need a 3 pin type, you could prob get them much cheaper from ebay.

your not wrong :-) speed would be quite close.. so you may get away with it. edit: but i dont think it will be more power than the original motor even though its geared down more.. the ampflow motor is only 3" diameter so at best it may be on par with the oset motor.

The gng is a brushless motor and would work if it fits, it has a kv of 67 ( not totally sure what the kv is on the standard oset 12.5l motors ) and i think the ampflow will spin way to fast to be a drop in replacement. Do you know what the kv is of the standard oset 12.5 motor is?

I dont think you will get anything that size ( drop in replacement ) for that sort of power in a brushed motor and you would be hard pushed to get a 2kw brushless also. The oset small brushed motors are about the best you are going to get for quality and power.

Personally I think its expensive for what it is and have always though this.. A six speed GB is a total waist of time on a electric bike ( just adds more weight ) you need no more than 3 gears but 2 gears should be all you ever need on a electric. A mechanical clutch is also a waste of valuable weight saving options ( my own personal opinion, based on tests and experience ). by the time you cost in a 2010+ GG bike you had just as well get a EM , having said that if the battery on the GG conversion is what the spec claims then it has more battery capacity than the EM and I also expect that a converted GG will be lighter than the EM ( but not by anything much if at all). bottom line... do your own conversion for a much cheaper option if you already have a gas bike that you want to be electric.

:-) not really anything to do with the bike, more to do with electrics and mains power supply ( and maybe static ) , can get the same sort of problems with anything that is plugged into a the mains but it is rare.