MiscRes: Video

|—————— IronHead Starter / Kickstart Related Videos ——————|

Kickstart

Videos by The Doctor71 of the XLFORUM Click Here to go to the thread.
How many crankshaft revolutions can be expected with 1 kick? I define “revolutions” as flywheel revolutions, NOT circuit breaker cam revolutions. To get flywheel revolutions, I multiplied circuit breaker cam revolutions x 2 (crankshaft turns 2 revs per 1 rev of the circuit cam). Using my non-scientific method of video taping the circuit breaker cam on my 1971 XLCH 900 motor and using the 225 lbs in this old body….. I can report I saw:

  1. Pushing very slowly on the kick pedal by hand (spark plugs removed), there was almost, but not quite 1 complete flywheel revolution.
  2. Using foot on the kick pedal (spark plugs removed), app. 2-3/4 flywheel revolutions.
  3. Using foot on the kick pedal (spark plugs installed), almost exactly 2 flywheel revolutions.
    More or less, this equates to one compression stroke, per cylinder, per kick, (at least on my bike).
    Note: The original videos were recorded at normal speed using 60fps. If needed, you can reduce the playback speed to aid in your viewing of the number of revolutions.
1. Slow Kick Thru Via Hand 1) 2. Leg Kick (without plugs) 2) 3. Leg Kick (with plugs) 3)


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1)
Link to file in Sportsterpedia: http://www.sportsterpedia.com/lib/exe/fetch.php/video:slow_kick_thru_via_hand_-_just_under_1_complete_revolution.mp4
2)
Link to file in Sportsterpedia: http://www.sportsterpedia.com/lib/exe/fetch.php/video:100-starter_kick_thru_without_spark_plugs_-_1_kick_-_almost_3_revolutions_by_the_doctor71.mp4
3)
Link to file in Sportsterpedia: http://www.sportsterpedia.com/lib/exe/fetch.php/video:100-starter_kick_thru_w_spark_plugs_installed_-_2_revolutions_by_the_doctor71.mp4
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Trace: • MiscRes: Video