Jack shaft questions

Discussion in 'General Questions' started by boyntonstu, Jan 4, 2015.

  1. boyntonstu

    boyntonstu Member

    1> How do you start the engine with a free wheeling jack shaft? Or can it be jump started?

    2> Would a 3 speed internal hub be more reliable than using a derailleur?

    From Sheldon Brown:


  2. wheelbender6

    wheelbender6 Well-Known Member

    Motorbikes with a jackshaft/shifter kit can be pull started or bump started.
    Most opt for bump starting (like push starting a car).
    -KCvale builds a lot of jackshaft/shifter motorbikes using the 3 speed internal hubs.
  3. boyntonstu

    boyntonstu Member

    How does the freewheeling crank allow bump starting?