How does a sbp shifter kit work?

Discussion in 'General Questions' started by DiscipleN9ne, Feb 22, 2015.

  1. DiscipleN9ne

    DiscipleN9ne New Member

    I'm currently in the process of building my first motorized bike. I have a northwoods 29er and I'm going to put the Flying horse 48cc engine on it but wanted more information about shift kits. How they work, any addition equipment, how to install, things like that. Thank you

  2. wheelbender6

    wheelbender6 Well-Known Member

    Basically, there is one chain from your engine to the jack shaft and another chain from the jackshaft to your pedal crankset. That's it. Pedal and engine power are transmitted thru your bicycle chain. You use your derailleur to shift. I would run your engine kit in stock form through break in. Then you will have enough experience with chain tension and alignment for your shift kit install to go smoothly.
  3. Arty

    Arty Active Member

    Jackshaft left side chain tensioner

    I have a "Sick Bike Parts" shift kit on my bike, and really like it, but it does take some care in setting up. One thing for sure I would do if you order one, is include the left side chain tensioner.
    The reason for this, is not so much for it's ability to take the slack out of the chain (although that's nice), but that the kit includes a third bearing for the jackshaft itself, along with the extra bracketry to install it.
    This really stiffens up the whole drive set-up, and I'm betting will eliminate quite a few alignment, and durability problems down the road. Below is a picture of the left side of the engine, with the left side tensioner gear's third bearing set in place.
    As well, the bracket makes a nice chain guard.
    - - Just my thoughts.

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