Sidevalve shopper

Discussion in 'Photos & Bicycle Builds' started by snailspacejase, Feb 9, 2008.

  1. snailspacejase

    snailspacejase New Member

    Hello folks.
    Thought you might be interested in some mods I've made to my side valve shopper. There are some other pics in the 'introduce yourself-lawnmower subversion in Devon' thread.
    I've just added the vertical stays, a front brake and sorted the gear change for the motor. It now sports 3 speeds and works a dream. Pulls up a 20% hill and lops along on the flat at a good lick with a relaxed rpm

    There's a vid of it on utube. Search for 'homemade motored bike demo' if you're interested.

    Attached Files:

    Last edited by a moderator: Dec 15, 2015

  2. That is amazing. I don't get though how you get three gears out of that.
  3. Alaskavan

    Alaskavan Guest

    Yes. Details on the gearing. Please?

    RATRODER Guest

    Looks like he has a three speed hub on the front. louis
  5. Hollywood

    Hollywood Guest

    I wonder how long that three speed hub will last with a engine load on it?It was made for pedal power shifting.Looks like some great fab work on making it and a great idea if it holds up.GOOD LUCK !!! GREAT IDEA SNAIL !!!
  6. mechanicojoe

    mechanicojoe Member

    What do you get when you cross a lawnmower with a shopping bike?
    il tell you. a realy awedome bike
  7. bluegoatwoods

    bluegoatwoods Well-Known Member

    And here I was all proud of myself for installing a couple of happy time motors :)

    But when this man says "I built it", he really means it.

    Good job!
  8. JemmaUK

    JemmaUK Guest

    Ye gods that motor brings back memories.... my dad used to have a lawnmower with that very engine on it - it was the living death to start it - even for him but I used to love that old thing - the electric ones just arent the same :(

    Incidentally have you heard of the hudspith steam bike... slow but fun...

    My current ride is a 1.6hp 32cc GEBE - soon to be fitted with the relevant tuned pipe which should give it between 25-30% more power from what I have read :D

    Incidentally are you using something like a sturmey archer hub to provide transmission?

    Have fun with it

    Jemma xx
  9. snailspacejase

    snailspacejase New Member

    face plant

    Well the 3 speed hub is working fine after a good 30 miles I rekon.
    It got the ultimate test the other day when I let a nutter mate have a go.
    I just assumed he'd take it easy on a bodge up machine, but no. He must have been doing 35mph (in flip flops and shorts) when he went past me. Afterwards I mentioned the posibility of the secondary chain de-railing, locking the front wheel and engaging his face with the tarmac!

    I think I'll stick to my Ducati for the speed kicks.
    Have fun with your bikes friends.
  10. highrider

    highrider Guest

    now thats different, a front engine, front wheel drive.:eek:
  11. snailspacejase

    snailspacejase New Member

    Lawnmower subversion in Devon 2

    Hi again.
    Thought you might like to see my latest project.
    The design brief was; really light and simple power assist. Friction drive.
    So I took one of my 5(!) strimmers apart and welded it to the back of a mountain bike.

    Easy. Erm well life's a learning curve and so was this.
    Got my calcs wrong and made too large a drive drum. Even at a relatively small diameter of 13cm the motor labours at 2000rpm at 10mph. I was after more like 5000 rpm at 10mph. A smaller drum just won't bite the tyre so the next move is to add some reduction gearing.
    Wish me luck.
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