Matt's stupid motorized bicycle thread

Discussion in 'Battle Scooters' started by RLK, Feb 27, 2007.

  1. RLK

    RLK 4,949

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    I need an urban mobility upgrade. I've been riding the city bus around with my bicycle on the bus's bike rack but they only run once every hour and 10 minutes and I have to transfer once and sometimes twice to get to where I need to be. The bike racks only hold two bikes and with spring nearly here lots more people are on bikes so the likelyhood of the bike rack being full before I get on increases.

    A couple of possible solutions:

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    $350
    http://www.wildernessenergy.com/unibikekit.html
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    http://www.kingsmotorbikes.com/Motorized_Bikes.htm

    $189 on sale, normal price $460 :scratch

    Please share your thoughts. Is there a BBS out there that covers such contraptions?
    #1
  2. Roadwarrior

    Roadwarrior Taking The Long Way

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    How about a dual sport kit for your XR250? I friend of mine put a Baja Designs kit on his XR250R and has been riding it on the road for years. With a bigger countershaft sprocket it handles the freeway easily. Makes a great city bike. He always puts a large padlock through the rear sprocket to keep anybody from riding away.
    #2
  3. RLK

    RLK 4,949

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    Happy birthday a week late.

    Know where I can find a good used KLR? :D
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  4. Photog

    Photog Charismatic Megafauna Administrator

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    Considered a Moped?

    http://www.mopedarmy.com/

    One of 'em was pacing me at about 40mph on the way in to work the other day so it must've been kitted--but it wasn't noisy. Looked like it had MX bars on it. Guy looked pretty comfy on it with his messenger bag so I figured he was one of the local scootcommuters exploring his dork side.

    I've thought about it, just to see how sleazy-cheap I could get. A used Tomos is for sale locally with exhaust and jetting done for $250 for it and a parts bike...I've seen others for $200 or so in running condition.

    PS:
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  5. RLK

    RLK 4,949

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    Yes. But there is this matter limiting my options. Gotta run in stealth mode for at least one year.

    I leaning toward the electric hub motor setup. I sold my car so I could buy a second bicycle and get both. You only live once.
    #5
  6. Photog

    Photog Charismatic Megafauna Administrator

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    Ah, okay--I just looked it up. Here in NC the moped doesn't need a license, insurance, etc...same for some 50cc scoots. Seems like CO sorta screwed people on that. :bluduh Crap.

    Have you tried this forum? http://www.motoredbikes.com/index.php

    They've got a section on e-bikes.

    I'll keep digging around. BTW, there's a bunch of hard core bicyclists on ADV...if you run into any parts issues or need help, holler. Most of us have a bunch of oddball parts in boxes if you need to mess around with wheelsets, brakes, etc.
    #6
  7. Ken OBSC

    Ken OBSC -6.12, -7.64

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    Matt:

    Your best bet is http://www.scooterbbs.com/ there is a Moped forum. I've never been on that forum but all the others usually have lots of good information.

    :gerg
    #7
  8. Photog

    Photog Charismatic Megafauna Administrator

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    What's the distance you need to commute, and what's the terrain like? :ear
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  9. RLK

    RLK 4,949

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    Its about 8 miles one way. Very slight grade, 1 or 2% except the .5 mile closest to home which is 7 or 8%. A more direct way is a lot more hilly. I've been going an extra mile to go around the hills. It's a hilly town and i'd like to go more places than just work.
    #9
  10. RLK

    RLK 4,949

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    Strike that... I am required by law to go more places than just work. The man in the black leather chair said, "7 days in the county jail (done, june 30- july 5, 2006+feb 25, 2007) 48 hours of useful public service, and 68 hours of education and therapy @ 2 hours per week."

    So, I must go all over town, over hill and dale, for a long fucking time.

    I bought a second bicycle today. $50 from the local craigslist. Its about 15 years old but probably only has 10 miles on it. Shimano XT 21 speed thumb shift driveline, 26" wheels, 21" rigid frame, ridgid forks, center pull brakes... Perfect for a SpookyTooth of Tuscon AZ 36 volt electric hub motor kit test platform. I was willing to pay up to $300 for the right ridgid fork bike that would take a hub motor. All the bike shops were full of $300-$2000 aluminum front suspension bikes that don't have enough fork clearance to fit the e-motor. Fuck 'em. :tush

    Poor little old puddin headed me was forced to look at craigslist for 3 minutes only pay $50 for exactly what I wanted. Don't cry for me scooterista. This is going to work!
    #10
  11. Photog

    Photog Charismatic Megafauna Administrator

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    OOoooo! PERFECT bike for this!

    Plenty of high-pressure tires available for that wheelsize to get the most efficiency out of that motor. That would be my next move since knobbies are gonna suck that battery down pronto. Any bike store will have "commuter" or some version of cross tires for 26" MTB wheels. I know it adds some money but it'll help out a great deal. If you don't find what you need in your budget range I'll see me and the guys can scrape up. I'm sure someone's got something since most of us have done the conversion a time or two.

    These will work...not much money. Only takes a few minutes a tire if you want to swap back to the knobbies.

    What else do you need? :ear
    #11
  12. 4SEVEN3

    4SEVEN3 Been here awhile

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    I got some of those exact tires for the wife's bike and had less than $40 in them including proper size tubes. Rolls supa fast now!

    Why not just pedal the thing, reap the health benefits and not look like your riding a liquorsikkle.:1drink
    #12
  13. oldmoped

    oldmoped size dont matters...

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  14. RLK

    RLK 4,949

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  15. RLK

    RLK 4,949

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    I decided to get my feet wet with a Wilderness Energy BD-36 electric kit which should arrive by Thursday. Eventually I want a gas motor for my other bike, infinite range.

    Thanks Photog Ken OSBC and Oldmoped for the helpful links. :raabia
    #15
  16. Photog

    Photog Charismatic Megafauna Administrator

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    GREAT! I can't wait to hear about it.
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  17. oldmoped

    oldmoped size dont matters...

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    In this picture i see:
    first is B-902 (start of '60-s) from Lvov factory, Ukraina, second Riga-11 (end of '70-s) from Rigas factory, Latvia and one homegrown model - sheap mountainbike with Russian latest D8E engine ('90-s) with oldtimer d4 gastank (from end of '50-s)
    :)
    #17
  18. RLK

    RLK 4,949

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    Its here.

    [​IMG]

    This as far as I have gotten so far. The batteries are charging now. In the meantime I want to see what the weak looking components are. What's going to break first and what I can I do to prevent a catastrophoic failure while i'm late to work.

    Lets see... The brain. Pulse width modulator, in theory, sends big or medium or little pulses of juice to the motor depending on throttle position. Much more efficient than a rhiostadt. :D I'm going to encounter rain and snow in the period I will need to use this rig, maybe i'll go wild and want to try a deep water crossing. :lol3 Maybe not. But the PWM controler has to survive road grit, Mag. chloride they spray on the streets to melt ice, sand, mud; whatever might spray up from the tires. Lets open her up!

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    I absolutely will seal around the edges, the wires port, and screw holes with clear silicone RTV to keep the muck out. The manual recomends that the controller be mounted under the seat. Makes since to me 'cause Like I said above, stealth is important. It has cooling fins on the base, or sort of a heat sink looking design to it. The maker took some steps to prevent failure from overheating. In this heat sink baseplate is a tiny weep hole, probably to allow a bit of ventilation. I won't seal this hole. I might do something to deflect foreign particles from entering and screwing up the tender synapses of my new/old "LiquorcycleGS" :rofl

    Build up begins tomorrow. I'm going to re-read everything I learned from those motored-bikes forums about how to prevent failures.


    Thumb throttle, WTF? That's gotta go. Its all plastic and seems like its pressed together.
    #18
  19. mercurial

    mercurial Fully Automatic

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    Looks like an interesting project. Keep us posted on your progress :clap
    #19
  20. RLK

    RLK 4,949

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    I've been riding it to work and back and for errands for a week now. Its fun!

    The install took longer than expected. The steel rack had to be bent at the mounting points to fit my bike. The quick-release hardware of the rear wheel and seat aren't designed to hold more than they do. It was a struggle to get the rack on. But the rack is very strong, that's a plus. After a week of riding I re-tightened everything because the mounts sort of settle in as expected. I don't want to loc-tite the fasteners because someday I will have a flat tire, and a blowtorch bungeed to the bike might raise suspision. :evil

    Well, here it is. My daily driver, before and after.

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    [​IMG]

    [​IMG]

    Hi to my friends at MotoredBikes.com FREE STICKERS! :lol3

    [​IMG]
    The green GT with RockShocks will probably get a 2 stroke gasoline rear drive kit, someday... I could build a trailer and haul a bunch of cargo, someday. :D

    From that site I learned that the spokes will wear holes in the tube, duh! It doesen't come with the big rubber band to protect an innertube.

    [​IMG]

    So I lined the wheel with foam/tape to cushion the innertube.
    [​IMG]
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    The rest of the installation went as planned but I did have to spread the forks a little. The hub motor is WIDE and there isn't much room between the outside of the motor and the forks. I looked a several bikes before I found one that would work. Forget about putting one of these motors on a bike with front shocks! I had to adjust the chain derailers (sp) because the rear rack messed up the alinement a little and the bike wouldn't go into 21st gear. I use 21st gear a lot now because this thing hauls ass on flatish grades and downhills. Probably over 30 mph but I can't find a good speedometer with an illuminated screen that will work reliably. The Bell backlit wireless unit I bought is INOP out of the box and the BackTrails one I bought re-sets its self if you don't stand on one foot and hold your toung just right, and there is no illumination. I long for the old cable driven speedo I bought at Sears in 1985. It had glow in the dark numbers and was bombproof. I digress.

    [​IMG]

    I like this motor and bike. I hope there is not much rain this summer.

    Thanks for reading!
    #20