Another 1st timer with a Roller

Discussion in 'Motorized Cruiser Bicycles' started by sketchman, Apr 20, 2011.

  1. Mike B

    Mike B New Member

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    Yeah, 200 will do it.

    That's still mondo fast for a bicycle though, so upgrade everything.
     
  2. sketchman

    sketchman New Member

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    This is hilarious. Probably 12 miles on this now and it wasn't running well at all. So I tear into it. Piston is scored, cylinder is scored, gaskets are leaking. It's toast already. What a waste.:-||

    For what it will cost to fix, I'm not bothering. Anyone need a bottom end cheap? PM me.
     
  3. sketchman

    sketchman New Member

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    My new engine and trans.
    [​IMG]
    [​IMG]

    51.7cc, 3:1 ratio before the rear sprocket, real bolts :), a light crank, 12mm wrist pin, reed valve, and an aftermarket through the roof. Should be fun.

    I was worried when I saw "Big Bore" kits on ebay advertising a 44mm bore. Googling showed me these are usually 40mm stock, but I just happened to get a bigger one that was already 44mm bore so it should be fine. Compression needs some work. It's 8.8:1 right now, but that can be fixed later.

    Got 2 drive sprockets to fit the output on the trans ordered(so I can keep my 41 chain size). An 8t and a 10t. What'll be really cool is I can change total ratio without ever messing with the rear sprocket. Set it and forget it.
     
  4. Mike B

    Mike B New Member

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    Bummer dude, blown up at 12 eh?
     
  5. sketchman

    sketchman New Member

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    Yep. Hoping this one will last longer. Everything about it just looks better made and fitted.
     
  6. CDizzle

    CDizzle New Member

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    apparently someone didn't read the manual where it says for a break in period of 50+miles you should not exceed 15-20mph or run the engine for more than 30min at a time.

    Running full bore within the first 4 miles i'm amazed it lasted a full 12.

    Good luck with your 4-stroke setup! You'll find them a lot more resilient when it comes to dealing with abuse.

    Also, i hope your angels are drinking redbull bro. 55 on a bike is a serious risk. I wish you the best of luck with that, and hope you have good medical coverage.
     
  7. rustycase

    rustycase Gutter Rider

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    SM, it doesn't seem to me like the goals are suitable to this sort of machinery.
    ..and if you are jousting with 'coal trucks' all the while, I would certainly give much thought to other options...

    MO...
    Good luck!
    I think u might need plenty of it!!!
    rc
     
  8. superharry

    superharry Member

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    lol, lifes too short to be walking!
     
  9. fugit

    fugit New Member

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    dang im afraid to do 55 in my Lincoln Town Car... you cant be serious about that... but can I insure you with a life insurance please??? Please PM details so I can get policy in force :)
     
  10. flmotorbikes

    flmotorbikes New Member

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    Ya the 3:1 ratio works well
     

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