Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMY

Dirty30 Dillon /
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> Double Trouble Dan Wrote:

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

> This is number one in a series of tips that have taken years of serious

> moped meddling to figure out. I will slowly disperse them in this thread

> .

>

> If you have a vespa that will not run ,but seems to have compression ,

> spark , and fuel , remove the cylinder and check the piston ring end

> gap. If it is larger than .012 on the lower end near the transfer ports

> the cylinder is worn out.

>

> We have found several vespa cylinders will wear out on the lower half

> and because of the way the fuel charge is delivered through the tiny

> crank case on those motors , the pressure is not enough to draw fuel

> through the transfer ports to the compression side of the cylinder.

Checking your ring end gap is not vespa specific, but always a good idea anytime you are servicing a top end.

The theory about Vespa's specifically not being able to meter and pump appropriately is just not true. They have great case pressure and with the small transfers have no problem filling the combustion chamber. Even if this were the case, why this would result in a worn lower portion of the bore and not seizure/top end failure, is beyond reason. If it doesn't have enough charge to lubricate the cold, un-stressed lower portion of the bore, it DEFINITELY doesn't have enough to lubricate the high-stress, high-temp portion under compression and detonation.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYTopic by: Double Trouble Dan Double Trouble Dan 12/03/20 08:08PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/03/20 08:31PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Justabunchoftrash 646260 Justabunchoftrash 646260 12/04/20 12:33AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: ♣Slew Foot♣ ♣Slew Foot♣ 12/04/20 08:11AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Graham Motzing Graham Motzing 12/04/20 10:17AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Stephen Keller Stephen Keller 12/05/20 11:04AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: scrot rash scrot rash 12/04/20 10:53AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 12/04/20 02:38PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: scrot rash scrot rash 12/05/20 10:52AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: live ɘvil live ɘvil 12/05/20 11:00AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Captain Janeway Captain Janeway 12/05/20 03:38PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Tri-ped Dave O.D.B. Tri-ped Dave O.D.B. 12/06/20 07:48AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: live ɘvil live ɘvil 12/06/20 04:42PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Jack Rutherford Jack Rutherford 12/08/20 04:52PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: live ɘvil live ɘvil 12/08/20 06:55PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Graham Motzing Graham Motzing 12/09/20 10:17AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 12/09/20 03:55PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Billy Clifford Billy Clifford 12/09/20 05:35PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/09/20 05:40PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: ♣Slew Foot♣ ♣Slew Foot♣ 12/05/20 03:33PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Graham Motzing Graham Motzing 12/05/20 07:31PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: scrot rash scrot rash 12/05/20 10:55AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Norris Hall Norris Hall 12/19/20 02:22PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: kenny s kenny s 12/06/20 12:45AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Graham Motzing Graham Motzing 12/06/20 10:10AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Born to be WillD Born to be WillD 12/16/20 11:53AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: live ɘvil live ɘvil 12/16/20 12:16PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/16/20 12:31PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: live ɘvil live ɘvil 12/16/20 02:38PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/16/20 05:10PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Tom Boyd Tom Boyd 12/18/20 03:27PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/18/20 04:28PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Blake Totally a real doctor Blake Totally a real doctor 12/18/20 04:28PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Johnny Braaapp Johnny Braaapp 01/16/21 09:52PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Brandon Love Brandon Love 12/06/20 10:19AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 12/08/20 06:46AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/08/20 09:49AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Dirty30 Dillon Dirty30 Dillon 12/08/20 10:14AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 12/08/20 07:10PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/08/20 07:57PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 12/09/20 07:01AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/09/20 10:29AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: baird co baird co 12/08/20 01:23PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: James P James P 12/08/20 10:33AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Jay Rivett Jay Rivett 12/16/20 11:40AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Matty Boh Matty Boh 12/08/20 08:22PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Probably Fred Probably Fred 12/09/20 07:35PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: live ɘvil live ɘvil 12/10/20 01:51AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Probably Fred Probably Fred 12/10/20 03:21AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: James P James P 12/10/20 03:51AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 12/15/20 01:57PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: baird co baird co 12/15/20 03:06PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: ♣Slew Foot♣ ♣Slew Foot♣ 12/15/20 06:39PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Probably Fred Probably Fred 12/15/20 10:59PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: 🇮🇹💦 Of the Loin 🇮🇹💦 Of the Loin 12/15/20 11:05PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/16/20 10:43AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: P D P D 12/16/20 10:45AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: 🇮🇹💦 Of the Loin 🇮🇹💦 Of the Loin 12/16/20 11:29AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Rebel Moby Rebel Moby 12/18/20 12:53PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 01/16/21 07:35PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Johnny Braaapp Johnny Braaapp 01/16/21 08:55PM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: Double Trouble Dan Double Trouble Dan 02/15/21 11:43AM
  Re: SECRET REPAIR TIPS YOU DON'T TELL TO THE PEOPLE FROM MOPED ARMYRe: ♣Slew Foot♣ ♣Slew Foot♣ 02/15/21 02:12PM

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