[bassiclyloudog]

with that motor and 4 12ah batteriesyou will hit 20mph. you could do the same thing with the 24v motor and not need batts. lipos are expensive, but buying less will help. it's an upfront cost and steep learning curve that scares people away, but think of how many more recharges you'll get vs. lead. lead is expensive! I bought 3 8ah batts for $63 and 1 was bad and the other was weak. I got the $50 refunded for me, but had to eat the shipping. now i have no batteries because lipos are too expensive, and I can't afford to do what I really want to do....run 72v on my 2 motored minibike with my 48v controller.

you can run the 650watt on 5 8ah batteries for a 60v monster that will take you to 24mph...just shy of 25.

YouTube Video

YouTube Video

YouTube Video

this last vid is 48v12ah with thestock controller. i was able to get over 4
mi on the 1st few charges; I'm ridin hard through the snow to boot! but i feel the 36v controller was drainin the batteries way too low. because that range didn't last long. but the razor controller rocks! it's very snappy with pickup speed compard to other controllers. was worth the fun i got out of it.

YouTube Video

[mjs]

Hoping someone can help...hooked everything up and it works...except it is not any faster and the motor smokes/smells/gets real hot.
This is the setup:
4 X 12 12ah battery= 48v
controller is a 24v-60v (50 amp i think)
motor is 36v 750w
All voltage is correct at the motor and everywhere else. Not sure what else it could be.

[bassiclyloudog]

is it a big boxy controller? with its own throttle, the hookup are just battery and motor? I had this controller. bought it for the flexibility of running multiple volyages. it burnt out the motor in my mx500. it smoked my 1k 36v motor as well. I sold it for $50 to a guy with a 48v 1k motor, he said it got hot and smelled bad, but after a few runs there were no issues.
the problem is it dumps too many amps to the motor under load and heats things up. you could change your gearing, but then you loase top speed. not to mention it's hard as hell to find bigger gears for an MX bike.
I suggest a new controller. sucks to spend that much on a controller and not be able to use it, but i had no luck and the other guy did, so it's your call in the end.

[mjs]

Thanks for the tip. That may be the same controller. I got it from TNC and it sounds like the same one (although it is not real big). Bigger then the stock one, but not huge. Had a bunch of Chinese markings on it that I couldnt read. I called TNC today and they said I could send the motor back for testing, but he was blaming the controller too. Said it was probably sending too many volts into the 36v motor. Could be, but maybe he meant to say amps. At most it was sending 52V. I used the same controller with my stock 500w 36 motor and used up to 60v (5x12) with no smoke. So perhaps the motor is bad or mislabeled. Dont know.

[ThatOneKid]

I'm new to this but have read many of the posts and the original ones about what I basically need to modify my Razor MX500. I don't know hardly anything about motors/engines/wiring so I plan on just buying the parts I need and hiring someone who knows how to do the job. I know this kind of takes the fun out of it :/ but I don't want to mess it up. I have a MX350 that I can mess around with and learn more about without worrying about screwing things up and wasting money.
*I also have a question. Do basically any battery/motor work for modifying an MX500? Like would these http://www.monsterscooterparts.com/12vo18ahscba.html work for it? Or are there specific ones that work?

[Dewman]

A list of Bolt on motor options and where to buy them would be most helpful.

I need a new motor.
Should I try to rewrap/brush the stock 650w or buy a bigger bolt on.
I have a stock MX650 and i am around 185 lbs.
I want it to pull the front wheel up(lil wheelie), hit 20 mph and Reliability is also a factor.

[OddJob514]

I've had an MX650 for a few years now and I'm really just looking to do a complete upgrade but I don't know where to start. Here's a list of things I want to do:

– 1000 or 1200watt motor (the swing arm will have to be welded to allow for longer motor)

– Add (1) 12Volt 12Ah battery, resulting in 48Volts total (Also open to 60V ideas too)

This is where it could get complicated:

– 2 Stage key ignition: Off/1st Stage gives power to motor/2nd Stage gives power to lights (Headlight, Taillight, and Blinkers)… I think I'll need a 3-wire key ignition

– Power for front and rear blinkers will run to 3-position switch (left blinkers on/all off/right blinkers on) located on left handlebar

– Obviously a battery controller for all of these functions (preferably a variable 36-60Volt controller, or closest match, so I don't have to buy multiple controllers depending on which battery setup)

– I'd also like a functioning brake light for the taillight (the stock MX650 brakes have triggers but I don't know if the can be wired to function with a brake light)

I think that's just about everything… Obviously there will be a lot of wiring. Oh, and I would want a reset-able circuit breaker so I don't have to replace fuses. I'm just wondering if anyone here has done similar projects or could help me out with list of items to buy (I really just need to know where to get these things from, I've looked at TNC Scooters but they're limited in some areas) Anybody have any ideas? THE MAIN THING I'M LOOKING FOR IS A BATTERY CONTROLLER FOR ALL OF THE PREVIOUSLY LISTED FUNCTIONS.

P.S. I have read most of the posts in this thread so I am aware of previously stated info but it's just all over the place so i am just hoping for some clear responses

P.P.S. I'd be willing to spend quite a bit on this project. (obviously I could buy a bike with all this but I'm partial to my MX650)

P.P.P.S. Here are my current upgrades:
http://www.youtube.com/watch?v=M2xZ1nYjskQ
http://www.youtube.com/watch?v=IKW2x2CiIAY

[gyrixx]

@dewman: both of my machines are wheelie machines, however I sunk serious cash into each and doubtfully would do it again.
If you get a 9tooth front sprocket (custom cut by my local machine shop) and a 90tooth rear sprocketv(also custom modified), add 1 1000w 48v motor (have to cut and weld the frame to make it fit) and run the yk42-4 controller you will be able to wheelie no problem.

I run dual 1000w motors w/ 9t front and 90t rear gears w/ dual yk42-4 controllers. Oh, and I have 5 22ah 12 batteries. The whole bike weighs a ton!

I'm at the end of my "electric is cool" phase as the cost of each bike, in hindsight, was fairly ludicrous compared to just buying a nice gas bike.

[gyrixx]

That being said, I have 4 kids who will soon be riding more and electric is a good way to start them off w/o ****ing off the neighbors.

[gyrixx]

Oddjob514: look up "motorcycle ignition switch" and "motorcycle turn signal switch" on eBay OR Craigslist and I think you'll find what you are looking for. The only complication is that the ignition switch typically will not handle the type of amperage the motor needs to run. (I have melted a few switches myself). You will need to search for a "48v contactor" (or "60v contactor") etc that is basically "triggered" by the ignition switch to then "turn on" the motor. (basically a high current relay)
Golf carts I believe use these with their "ignition key" systems.

[OddJob514]

Thanks gyrixx… Do you know of any controllers with inputs for the motorcycle handlebar lights/signals/horn switches and corresponding connections for the headlight, tail/brake light, signals, and horn? There are a couple with connections for ignition key, brake light, and pilot light on electricscooterparts.com but I'm just confused as to how I would go about wiring the handlebar lights/signals/horn switch to the power supply and to the lights themselves.

[gyrixx]

Sadly, I have no real world experience doing it with anything as complex as you're attempting.

I would suggest getting the electrical harness for actual motorcycle and working backwards from there. That would probably get you everything you need in 1 package, less the controller unit you need to get off tncscooters etc.

[OddJob514]

@gyrixx you wouldn't happen to have a dual motor monster MX2000? If you do could you post some pics of the chain setup with the dual motors? Just curious.

@bassiclyloudog what are the best sources for lipos for MX application?

Anyone: Could an alternator be used to run power back into the batteries while riding and increase ride time or would that damage the batteries' ability to hold charge? I'd imagine charging the batteries with an alternator would damage their ability to charge since no one ever mentions an alternator add-on. I just figured I'd ask before I go and ruin $150 worth of batteries through trial and error. Also, has anyone tried powering accessories via an alternator hooked up to an extra battery not in series with the main batteries powering the motor?

[gyrixx]

You're talking about running electricity to a motor to turn the wheels, and then asking the wheels to turn a nother motor to generate electricity back...

As an engineer, I will try to explain it as follows: Energy in always equal energy out. That means, that in this situation, you are asking the batteries To put their energy into the first motor.

That motors job is to convert electrical energy into Physical energy, However, some of it is lost as heat in the motor itself.

That physical energy is you driving a motorcycle around.

By adding an alternator, you're sucking away that physical energy to put back electricity into the battery.

And the alternator generates heat too, which is wasted energy.

You would basically be asking the battery to charge itself, Which is physically impossible.:-)

[OddJob514]

Gracias gyrixx, figured as much before I asked, I guess I just wanted to hear someone else say it in order to convince myself… Still tempted to, at a much later date, try running accessory lighting and speakers off of an alternator and extra battery though… Maybe after I upgrade to 60V I can add a separate 12V above the swing arm and power stuff, just for kicks

And anybody know where to find good, less-expensive lipos for MX650s?

[gyrixx]

You can still run accessories using a BEC (battery elimator circuit). Search for that type of device in Google and hobby parts stores. Find one that takes 48-52 Volts and outputs 12v.

[OddJob514]

I need a quick upgrade till I get another mx650 from a friend and find someone to weld the swing arm and I want to get this motor: http://tncscooters.com/index.php?rou...&product_id=58
I just need to know for a fact if this is a drop in, direct bolt on motor that I can put in with no mods to the mounts. Does anybody know?

[gyrixx]

Yes that would physically fit where the old motor goes, but it would be a downgrade from the 650 watt 1 you took out.

A lot of people here talk about speed as their goal, I build all of my machines for raw wattage &baking peak torque.

[gastonrodney]

how do you make a new thread people are saying go to the new section and do it there but u do not \have a new section button

[gastonrodney]

my nephew got a pocket bike starts fine runs good but dies after 2 min of running and i cant get it started again for an hour or two any ideas please and thank you.....i tried to make a new thread and couldnt ok with engines not computers