need some help

Discussion in 'Frame Mounted Engines' started by samuari86, Jan 8, 2011.

  1. samuari86

    samuari86 Member

    building my motor bicycle and allready got a hf 2.5hr motor a jackshaft,clutch,chain. but i need a sprocket that will fit a #35 chain for the back wheel. i will post all the pics win im finsh. if they dont make one ill go back to the jackshaft sprocket and change that to fit the back sprocket.TY for all the help,chris
     

  2. samuari86

    samuari86 Member

    allso iv been to websites and most dont say what chain is being used on there sprockets so thats y im coming to you guys
     
  3. ibdennyak

    ibdennyak Guest

    Bicycle chain is probably the most common and easiest to find in various tooth counts. This includes #41, 410, 415 and anything else with a 4 in the front. They all have a 1/2 inch pitch length. 35 is also common with its 3/8 pitch length, but I've found the sprocket selection is more limited. Some scooters also use 8 mm and even #25 with a 1/4 inch pitch.

    Think you were confused before???? :grin5:
     
  4. samuari86

    samuari86 Member

    lol im still confused, but ill get it and ill still post all the pics win im don
     
  5. GearNut

    GearNut Active Member

    Many, many mini bikes and gas powered "razor" go karts use a #35 chain, and sprockets are plenty to be found.
     
  6. 5-7HEAVEN

    5-7HEAVEN Guest

    Are you using a single-speed or multi-speed cruiser bike?

    Your HF engine produces 2.5hp@3600rpm with governor.

    If using 8:1 gear ratio, top speed is about 35mph.

    Is that good for you?

    If yes, use 12-tooth sprocket on engine and 16-tooth on jackshaft. On other side of jackshaft, use 10-tooth sprocket. The drive sprocket on the wheel will be 60-tooth sprocket.

    That will calculate to exactly 8:1.
     
    Last edited by a moderator: Jan 8, 2011
  7. samuari86

    samuari86 Member

    cant post any pics :( ----- just go to my page and have a look, have a good day guys
     
    Last edited: Jan 12, 2011
  8. professor

    professor Active Member

    I used a rag joint and adapted a bike sprocket to it but you can use a kit sprocket if you use the wider chain. I am using a HF79 also with belt and chain drive.
     
  9. samuari86

    samuari86 Member

    heres some pics to start
     

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  10. samuari86

    samuari86 Member

    !!!!!
     

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  11. samuari86

    samuari86 Member

    !!!!!!!! some more
     

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  12. samuari86

    samuari86 Member

    so much more to come,ty
     

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  13. samuari86

    samuari86 Member

    alote of the parts on there are just for mook up,if thats how you spell mook :)
     
  14. samuari86

    samuari86 Member

    after posting all the pics from the last month i started working on the gas tank today so here some more pics
     

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  15. GearNut

    GearNut Active Member

    This thread is looking good!
     
  16. samuari86

    samuari86 Member

  17. samuari86

    samuari86 Member

    did some more work today
     

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  18. samuari86

    samuari86 Member

    and the chain still lines up with the airbag deflated.
     

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  19. samuari86

    samuari86 Member

    !!!!!!
     

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  20. samuari86

    samuari86 Member

    did some more today:bowdown:
     

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