72 teeth of beauty !!! :)

Discussion in 'Motorized Bicycle General Discussion' started by azbill, Jan 24, 2010.

  1. azbill

    azbill Active Member

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    this is my new sprocket from Jim at Creative Engineering
    what a nicely machined piece of work ;)
    (thanks Jim, this is a very cool addition to my bike :))
    it is a 72 toother !!!
    I will be using it on my new stretch build
    I need the huge torque for pulling the trailer up big hills where I live
    (the girls are NOT getting smaller ;))

    1st pic is the 72T beside a stock 44T that comes in most kits
    next 2 pics are opposing sides of the sprocket showing that the lightening holes are counter-sunk on both sides :)
    last pic shows mounted on my new HD Husky coaster (12ga spokes)
    ...to make the chrome coaster match my front drum wheel (black rim), I sanded the rim with 220 wet/dry and taped all 36 spokes, painted with dupli-color satin black engine enamel
     

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  2. ReaperZ

    ReaperZ New Member

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    Beautifull....what size adapter did you order for the husky coaster brake...jim
     
  3. mekano

    mekano New Member

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    Boy thats almost a 20" wheel! Double up the chain!
     
  4. azbill

    azbill Active Member

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    Reaperz,
    cb-110 (1.524")
    tell Jim/Karen you are using the big spokes
    (the mount pattern is bigger to clear the spokes)
    Jim said he uses the OCC mount pattern ;)
     
  5. ReaperZ

    ReaperZ New Member

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    Thanks bill...will do..jim
     
  6. macattie88

    macattie88 New Member

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    nice piece...jim does great work...i just recieved my sproket and hub adapter and man do they look great...got them quickly too
     
  7. Gareth

    Gareth New Member

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    With the price of aluminum, Jim sure goes to a lot of work to keep a little extra dust....

    :p


    Looks great..

    I get in enough trouble poppin the front end up with just the 50 toother.

    I would be a certified menace with that thing....king like a trials bike....hmmm

    [​IMG]
     
  8. azbill

    azbill Active Member

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    the speed limit here in AZ is only 20mph :(
    even with a 56T, I was only using about half of the throttle to keep the speed down
    this will enable me to use the full range of the Q-Matic's (EZM 4cycle) capabilities and not get in trouble :)
     
  9. GearNut

    GearNut Active Member

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    Wow! That resembles the blade on my tablesaw, just a different tooth profile.
    With the torque you are gonna get, I bet that you could climb a telephone pole with it!
     
  10. bairdco

    bairdco a guy who makes cool bikes

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    that thing is nuts.
     
  11. Spunout

    Spunout MB Builder Extraordinaire

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    that sprocket is SIKK!

    when i lived in Tucson, i always thought the 20mph limit was fair and good enough. but out here, the limit is 30mph. wow what a difference that extra 10mph makes, especially when you gotta be someplace. xct2

    do you have pics of your new stretch someplace? or are you doing a step-by-step install w/pics?
     
  12. azbill

    azbill Active Member

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    not a lot done yet, but I will try to get some pics and start a build thread :)
     
  13. Dan

    Dan Staff
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    Lookin' awesome Bill. What kind of tire is that?
     
  14. azbill

    azbill Active Member

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    speciallized crossroads armadillo... kevlar belted and hard wearing rubber
    (3500+ miles on 'em and they still look new)
    it was on the jag :)
    the front drum wheel will be going to the stretch as well, that's why I painted the new coaster rim ;)
     
  15. Fossil

    Fossil New Member

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    With that size sprocket you will be able to climb the side of a building provided you have the traction. Wow....
    That thing looks great. Jim does nice work.

    Jim
     
  16. Dan

    Dan Staff
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    Amazing. Looking at the pics, did think it was brand new.

    Sprocket is gonna look sweet turning.
     
  17. azbill

    azbill Active Member

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    I did clean the tires with soft-scrub in anticipation of it going on the stretch
    cleaned up the oil from the chain on the side-walls nicely :)
     
  18. Dan

    Dan Staff
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    Dang Bill, I have so much brake dust you can not tell my wheels are white walls, lol
     

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