Re: Vespa 43mm Olympia kit jetting

Dirty30 Dillon /
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> P D Wrote:

> -------------------------------------------------------

> > Dirty30 Dillon Wrote:

>

> > -------------------------------------------------------

>

> > you have to look at the ring gaps

>

> Ring end gap placement should be one of the first things considered .

>

> My Simplex replacement piston came with no ring locating pins .

>

> I ran it that way for a short while . Every time I took the top end off

> , I found the ring ends traversing intake ports , even though I had them

> set at 120° ( straddling ports ) when previously installed . I installed

> roll pins and reshaped the ring ends to eliminate the problem .

>

> https://i.postimg.cc/FFqrk09M/HPIM1987_zpsrisotftu.jpg

To be fair, the Simplex is the exception rather than the rule. I have pulled/changed probably 60 moped top ends and cylinders and never seen one that didn't have ring locating pins. And I can also say that off those, 0% had a gap that terminated in a port both stock and otherwise. Were they all optimally located? No, but they were not incorrectly placed for failure.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Vespa 43mm Olympia kit jettingTopic by: Alek . Alek . 12/08/19 10:13AM
  Re: Vespa 43mm Olympia kit jettingRe: pat splat pat splat 12/08/19 12:44PM
  Re: Vespa 43mm Olympia kit jettingRe: - Joe - - Joe - 12/08/19 02:32PM
  Re: Vespa 43mm Olympia kit jettingRe: Gle Cas Gle Cas 12/09/19 06:33AM
  Re: Vespa 43mm Olympia kit jettingRe: Richard Eberline Richard Eberline 12/09/19 06:43AM
  Re: Vespa 43mm Olympia kit jettingRe: Gle Cas Gle Cas 12/09/19 11:55AM
  Re: Vespa 43mm Olympia kit jettingRe: Gle Cas Gle Cas 12/09/19 10:03PM
  Re: Vespa 43mm Olympia kit jettingRe: P D P D 12/10/19 09:51AM
  Re: Vespa 43mm Olympia kit jettingRe: Gle Cas Gle Cas 12/10/19 10:10AM
  Re: Vespa 43mm Olympia kit jettingRe: P D P D 12/10/19 10:19AM
  Re: Vespa 43mm Olympia kit jettingRe: Gle Cas Gle Cas 12/10/19 10:36AM
  Re: Vespa 43mm Olympia kit jettingRe: Graham Motzing Graham Motzing 12/09/19 12:43PM
  Re: Vespa 43mm Olympia kit jettingRe: Toledo Riot Toledo Riot 12/09/19 04:55PM
  Re: Vespa 43mm Olympia kit jettingRe: Graham Motzing Graham Motzing 12/09/19 05:34PM
  Re: Vespa 43mm Olympia kit jettingRe: Gle Cas Gle Cas 12/09/19 06:09PM
  Re: Vespa 43mm Olympia kit jettingRe: Toledo Riot Toledo Riot 12/10/19 09:41AM
  Re: Vespa 43mm Olympia kit jettingRe: Dirty30 Dillon Dirty30 Dillon 12/10/19 10:30AM
  Re: Vespa 43mm Olympia kit jettingRe: Alek . Alek . 12/10/19 12:48PM
  Re: Vespa 43mm Olympia kit jettingRe: Les B. Les B. 02/18/20 10:09AM
  Re: Vespa 43mm Olympia kit jettingRe: Dirty30 Dillon Dirty30 Dillon 02/18/20 10:15AM
  Re: Vespa 43mm Olympia kit jettingRe: Les B. Les B. 02/18/20 10:23AM
  Re: Vespa 43mm Olympia kit jettingRe: P D P D 02/18/20 10:55AM
  Re: Vespa 43mm Olympia kit jettingRe: pat splat pat splat 02/18/20 11:16AM
  Re: Vespa 43mm Olympia kit jettingRe: Richard Eberline Richard Eberline 02/18/20 03:34PM
  Re: Vespa 43mm Olympia kit jettingRe: Dirty30 Dillon Dirty30 Dillon 02/18/20 03:52PM
  Re: Vespa 43mm Olympia kit jettingRe: Les B. Les B. 02/18/20 06:26PM
  Re: Vespa 43mm Olympia kit jettingRe: Richard Eberline Richard Eberline 02/19/20 07:22AM
  Re: Vespa 43mm Olympia kit jettingRe: Dirty30 Dillon Dirty30 Dillon 02/19/20 09:37AM
  Re: Vespa 43mm Olympia kit jettingRe: P D P D 02/19/20 10:26AM
  Re: Vespa 43mm Olympia kit jettingRe: Dirty30 Dillon Dirty30 Dillon 02/19/20 10:36AM
  Re: Vespa 43mm Olympia kit jettingRe: P D P D 02/19/20 11:03AM
  Re: Vespa 43mm Olympia kit jettingRe: pat splat pat splat 02/19/20 12:15PM
  Re: Vespa 43mm Olympia kit jettingRe: Dirty30 Dillon Dirty30 Dillon 02/19/20 01:24PM

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