Re: Motobecane SHA 15.15 Dellorto..? or others

Graham Motzing /
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I wouldn't mess with the head gasket on an o-ring head. Head gasket is a higher pressure seal and will be more likely to leak if you do some janky shit.

base gasket is a lower pressure seal so you can get away with more jank.

going to a thicker gasket (the cardboard from the back of a high-quality legal pad is really good stuff, like 2.5mm thick- 2mm compressed) will raise your exhaust and transfer ports, which has a similar effect to porting them.

some people call this a 'rev plate'... its not ideal, much better to do acutal porting, but it is 100% reverseable and lets you see how raising the ports 1mm or so will affect your powerband.

using thick cardboard is more likely to compress unevenly if you don't use a torque wrench, which can bind your piston and smoke ya. You can also cut a plate out of aluminum and sandwich it between thin gaskets, or anneal it and use motoseal, or any number of things to raise the cylinder a little bit.

it will also drop the compression on top.

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Subject Written By Posted
  Motobecane SHA 15.15 Dellorto..? or othersTopic by: julian schroder julian schroder 05/27/14 08:16PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Michael Sheeler Michael Sheeler 05/27/14 08:55PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: julian schroder julian schroder 05/28/14 12:38AM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Brent Bublitz Brent Bublitz 05/28/14 09:09AM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: M-Tenn Aaron M-Tenn Aaron 05/28/14 09:26AM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Mel Dyer Mel Dyer 05/28/14 09:58AM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: julian schroder julian schroder 05/28/14 07:34PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: moby mcfly moby mcfly 05/29/14 02:13PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Brent Bublitz Brent Bublitz 05/29/14 04:56PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Mel Dyer Mel Dyer 05/29/14 05:15PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: moby mcfly moby mcfly 05/29/14 05:34PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Graham Motzing Graham Motzing 05/29/14 05:55PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: brian schulz brian schulz 05/30/14 10:10AM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Graham Motzing Graham Motzing 05/30/14 10:50AM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: brian schulz brian schulz 05/30/14 12:34PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: moby mcfly moby mcfly 05/30/14 12:24PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Graham Motzing Graham Motzing 05/30/14 12:56PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: brian schulz brian schulz 05/30/14 01:04PM
  Re: Motobecane SHA 15.15 Dellorto..? or othersRe: Brent Bublitz Brent Bublitz 05/30/14 03:47PM

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