4 stroke stator genorator?

Discussion in 'General Questions' started by bikejock, Apr 16, 2015.

  1. bikejock

    bikejock Member

    I would love to be able to hook up a stator genorator to the 4 stroke engine I plan on using for my first 4 stroke build. I'm getting a grubby 4G kit in about 2 or 3 weeks and I'm also doing what I can to make the bikes street legal while I wait.

    I'm looking to do a similar wiring set up that Vespa style scooters & motorcycles have using a 12 volt battery all needed lights, flasher relay and horn. Ideally I would like to have the battery hooked up to the engine that way the only way the battery dies if I leave the engine off with lights on.

    Since motorized bicycles don't use key ignitions I might just bypass the key start system with a simple on off switch for the electrical and have the stator genorator charge the battery while the motor is running. Has anyone ever done this with a Grubee 4G 49cc 4 stroke motorized bicycle before? If so I would like to see some examples.
     

  2. KCvale

    KCvale Motorized Bicycle Vendor

    This is the HS 142F ignition.

    The magnets on the rotor in this picture are at about 3 and 9 O'clock.
    The CDI is the black box on top.

    [​IMG]

    With a small ~15-20V coil pickup mounted in there somewhere you could have raw AC out, convert that to DC and regulate it and you're set to charge your battery and run your 'stuff' when the engine is running.
     
    Last edited: Apr 17, 2015
    bikejock likes this.
  3. bikejock

    bikejock Member

     
  4. josh

    josh New Member

    yea man im looking to do something similar. i want a glow kit like the ones you can get on a Harley. i would just need a 12v power source and some generator to keep the charge. i thought there might have been some way to use the existing wires to get some type of power to an added device but im not to electric savy so i wouldnt know how to wire it in
     
  5. bikejock

    bikejock Member

    I also was thinking about adding glow lights to my bike eventually. Found a set for $60 I'm thinking of getting later on Amazon. I'll have to see how heavy my bike would be after adding all the street legal hardware because my bike is pretty heavy even without the motor kit and lights.

    I might need to mod my kit so I can get better speeds so my engine isn't struggling with the weight of my bike. I'm thinking of using a different sprocket size to increase speed to 5 or 10 miles per our more than the standard speed so it can handle a little extra weight.

    The thing with electrical systems (like the kind I'm putting together) adds a fair amount of weight. The battery alone can add another 5 to 7 lbs to the bike. The lights and brackets to hold everything can add another 5 or more lbs.

    If you just want simple glow lights and don't want signal lights, head light, tail light etc. you can just wire up the glow lights to a 12 volt battery and to an on off switch and it should be good to go. You'd just need a charger to re charge it through an AC outlet when it gets low. A simple 12 volt lithium ion battery should be enough power and those lights also they can be pretty small making them easy to mount with the right hardware.
     
    Last edited: Apr 17, 2015
  6. josh

    josh New Member

    right, i found a 40 dollar harley glow kit that is instructed to hook to the battery on the bike but we dont really have that option so yea i might just end up mounting a small power pack to light it up. i currently have the 4 stroke kit with a 36 tooth sprocket and once you get it going it gets pretty fast. i dont have a speedometer so i dont know the exact speed but it goes. on the down side the torque sucks. im about 215lbs so i know im not light but the engine hardly puts in any effort from a complete stop but as i mention once you get her goin she will speed up. i havent even gotten to its full potential because im still in the process of breaking in the engine and i dont wanna get those rpms to high just yet. but from what ive read there really isnt much to do to increase the torque other than get a higher tooth sprocket but then you loose top end speed and in your case if you want to be on the road and keep up with traffic your going to need both torque and speed because cars dont really have the patience for you to start peddling to get your speed up lol. i did see little things you can do to help with horsepower but im not to sure if it really has much of affect, but if you did find a way to raise the horsepower it would help alot because it would engage the centrifugal clutch faster and then get the bike moving quicker and if you find a way to do that be sure and let me know lol
     
  7. KCvale

    KCvale Motorized Bicycle Vendor

    Indeed I do.
    With a little pulley or gear on the KCK 10G Long Shaft a little generator could be added to the shaft by the seat post.

    [​IMG]

    12V Sealed Lead Acid batteries are cheap and only weigh about a pound.
     
  8. bikejock

    bikejock Member

    That's A cool design. Nice Fito by the way. I was thinking of getting a Fito as a back up cruiser in case anything happens to my Deuce.

    How much for that transmission you got there? and where do I get one of those?
     
  9. KCvale

    KCvale Motorized Bicycle Vendor

    Thanks for the kudos.
    This is my transfer case and base design and the first working model.

    [​IMG]

    I will have that and more 4-stroke based parts and unique kits for sale this summer.
    Price is unknown as of yet, much of it will depend on the final cost get my pallet of parts currently in a shipping container literally on a slow boat from Chine to my place.

    I am looking for a little pulley system for the shaft to attach a generator but right now it is still torture testing the base and shaft system.
     
  10. bikejock

    bikejock Member

    That Fito makes me want to consider a geared jack shaft bike for my second 4 stroke build but that's a little further into the future after I get my M1 license which I'm working on getting. My friend is letting me borrow his motorcycle until I pass my road test. In California It's pretty much required to drive a motorized bike that has gears and goes faster than 30 mph. I will be having lots of fun once I have my Deuce 4 stroke built.
     
  11. dohnutt

    dohnutt Guest

    a little pulley and either chain or belt would leach most of the power from this tiny engine- KC says on many other threads.
     
  12. KCvale

    KCvale Motorized Bicycle Vendor

    This is over a year old thread but you are right, generating power from these little engines will suck motion power.
    No power is free.

    I think a low enough draw rate to charge a battery might work well depending on how much electric power you need to use, and how often you need it.

    You'll feel the loss of power to your wheel, but the trick is how much?

    I have not tried this yet... but once I get caught up on demand for my 4-stroke shifter orders I do plan to re-visit this.
    I use the slightly larger 53cc HS 144F-1G 4-stroke engines, and with gears they play with 40mph, I'll bet I can come up with something for electric power and still kick any 'gasbike' 49cc direct drive bike kits butt in every way ;-}
     
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