How do you improve HT engine low-end torque?

Discussion in '2-Stroke Engines' started by AussieSteve, Nov 12, 2009.

  1. AussieSteve

    AussieSteve Active Member

    These little engines could do with more power at low revs.
    That way they can be geared higher for a faster top speed, yet still idle along at a nice slow pace without surging and bucking and be easy to start without pedalling too fast.

    The quickest and easiest way is to increase the compression ratio. The slant heads are a cheap way to do this, with a compression ratio of about 8:1. The head can also be milled if clearance is checked.

    I found a 16:1 billet aluminimum head at Rock Solid Engines and will order one.
    (A bit expensive at $AU95, but ...)

    A heavier flywheel would increase bottom-end, but that's near impossible on these engines.

    What are other ways of doing it?

    ... Steve

  2. etacovda

    etacovda Member

    expansion exhaust pipe should improve low end if tuned correctly.