build progress and completion pics of my motobecane

Discussion in 'Photos & Bicycle Builds' started by dchevygod, May 13, 2012.

  1. dchevygod

    dchevygod Member


  2. dchevygod

    dchevygod Member

    Ask away guys I like the feedback
     
  3. professor

    professor Active Member

    No questions, but to comment that it looks good!
     
  4. dchevygod

    dchevygod Member

    Thank you kindly Professor. Can you name the main pieces? I've been waiting for someone to ask what the clutch/motor mount is from...
     
  5. Lunardog

    Lunardog Member

    I have to get a set of those handlebars or make some.Just the right height. I hate leaning so far forward on mine. Nice build.
     
  6. dchevygod

    dchevygod Member

    So this one is a gone but not forgotten build. I did build my moto 2.0. Its a very similar motobecane 400ht in gloss black. It gives me the fizz "if u liked Topgear you understand". Its a 460 frame mounted on a shift kit. I modified a cag pb pipe for it but otherwise its a stock engine... 54.9mph in 5th on the flat! Ive got 8 speeds so I need to reduce more so the pedal assist is in the correct ratio first second and third will be granny gears and the 6-7-8 gears will be more usable.
     
  7. zippinaround

    zippinaround Active Member

    How do you mean you have 8 gears? Looks to me like it's set up on the left side not through the gears.
    Just spotted you said it's a different bike , but did you make the mount bracket yourself?
     
  8. dchevygod

    dchevygod Member

    No I cant take credit for that beautiful piece of billet. That is a Flowsystem billet "bigfoot goped" mount repurposed for a bike build. Belt drive custom. Only the wheel/sheave and belt were from GEBE.
     
  9. zippinaround

    zippinaround Active Member

    What was the size of the drive sprocket? Or where you find it?
     
  10. dchevygod

    dchevygod Member

    12:272 is the ratio of the 26cc goped motered belt drive unit I built on moto 1.0. Any htd pitch cog will work on the newer gebe sheave, toothed belts are the quiet alternate to chains. Heavy duty wheels are a must for high HP belt drive engines though.
     
  11. dchevygod

    dchevygod Member

    [​IMG]

    This is Motobecane 2.0 or the "double indian" I've dubbed it. its a stock GopPed motor with a modded cag pipe on a custom shift kit. Mounted on a beefed up modified 4t mount plate, thru the stock 8spd cassette.
     
    FurryOnTheInside likes this.
  12. zippinaround

    zippinaround Active Member

    Can you recall what size the belt drive sprocket was? 5mm? Or the diameter of the driven hoop
     
  13. dchevygod

    dchevygod Member

    The motor drive cog was 5mm pitch HTD, 9mm wide 12 teeth and the sheave is 272 virtual tooth size. I have another sheave and I believe the diameter is 16.5" I'll have to dig it up and measure.
     
  14. dchevygod

    dchevygod Member

    16.25" nominal diameter on the GEBE
    sheave I still have.
     
    zippinaround likes this.
  15. dchevygod

    dchevygod Member

    Well i knew this motor made good power. I was cruising at about 35 and my pedal chain jumped and wrapped around the bottom bracket ripping the derailluer off snapping the sram chain and destroyed the SBP 24t drive sprocket... This is not how i wanted my leisure ride to end but now i know the drive sprocket was too little for the rpm that i can turn.

    So now I will need to replace the hanger/derailleur, chain and up size the drive sprocket from 24t proportionally so that a 72t can be used instead of the 54t Im currently running. This will allow for more off the line speed ability as well as reduce parasitic drag on the drive system. And my pedal ratio will be better suited to assist at any speed. Right now the pedals don't really have the push I would like with the current setup.

    4.2 HP @11000 rpm on a 5:1, to an 11t, then 54t secondary, directly attached to the 24t then to the 8spd cassette.
     
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