v belt drive gearing

Discussion in 'Motorized Bicycle General Discussion' started by ragdolldude, Jun 1, 2016.

  1. ragdolldude

    ragdolldude Member

    Joined:
    May 6, 2016
    Messages:
    38
    Likes Received:
    0
    Just introduced myself the other day. I noted I was getting a v-plex clutch that is NOS. Idle, and the clutch doesn't operate. Increase rpm and two tapered sides of pulley pull together increasing diameter of pulley. Goes from around 1 1/8" up to about 2 1/4" diameter pulley. I don't want to use a jackshaft, and was wondering what size sheave to use on rear 26" tire. I plan on using a Honda Gx50 engine, likely on a cruiser frame, mid frame mount. I initially thought the 15 inch whizzer sheave would work, but others have suggested a 24 inch narrow bike rim as a sheave, bolted with brackets to rear wheel. I assume someone has already done this and was hoping to benefit from your experience, instead of tying different sheaves. Thanks
     
  2. MEASURE TWICE

    MEASURE TWICE Active Member

    Joined:
    Jul 13, 2010
    Messages:
    2,125
    Likes Received:
    23
    http://motorbicycling.com/showthread.php?t=28803&page=65

    This thread of Harry76 has been around from the past. A lot of pages here too. There are many pictures that used some way of posting that don't show up anymore, but this page has a close up of what he made with a ? 24inch rim as a sheave.
     
  3. Tony01

    Tony01 Active Member

    Joined:
    Nov 28, 2012
    Messages:
    974
    Likes Received:
    29
    Use a 26" skinny rim for your sheave, but you'll have to widen the frame in the back... By cutting and welding. This will give a 13:1 ratio in top gear.
     
  4. curtisfox

    curtisfox Well-Known Member

    Joined:
    Dec 29, 2008
    Messages:
    4,127
    Likes Received:
    52
    Yes that might be better yet, and easier to mount straight tabs. And with the high rev Honda would give you a good top speed.................Curt
     

Share This Page