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#331882 - 09/05/10 10:41 pm gas cap rebuild  
Joined: Aug 2001
Posts: 63
Steve in Ohio Offline
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Steve in Ohio  Offline
BritBike Forum member

Joined: Aug 2001
Posts: 63
Central Ohio
The flip top gas cap on my spitfire tank (small fiberglass) is toast. The inner gaskets and washers (?) are rusted away. I tried to fix it by tapping a new hole in the cap and replacing the rubber gasket and reusing the large metal washer looking cap and then using a large fender washer to hold it all together. Well it is not working right. I thought I had seen reference to someone (Alex I think) who had done a rebuild on these. Sorry for the vagueness, but hard to explain. Any ideas would be helpful.
Steve in Ohio



'68 A65 Bitsa
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#331894 - 09/06/10 12:35 am Re: gas cap rebuild [Re: Steve in Ohio]  
Joined: Sep 2002
Posts: 7,812
Alex Offline
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Alex  Offline

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Joined: Sep 2002
Posts: 7,812
Seattle
Steve, is it the alloy GP-style cap? I can't seem to get that one to seal up either. Both my victor tank and my rickman have this cap and I've tried all kinds of new seals and no luck so far. Would like to know how to crack the code on these myself.

I've fixed the twist-lock flip cap on my '67 royal star by cutting a rubber gasket out of 3/32" neoprene rubber sheet. That one worked well right away.


A smattering:
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#332007 - 09/06/10 4:00 pm Re: gas cap rebuild [Re: Steve in Ohio]  
Joined: Jan 2004
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DMadigan Online content
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DMadigan  Online Content
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Joined: Jan 2004
Posts: 3,518
ca, us
Pictures would help. BAT in Sarasota FL has new caps is several sizes.
Is the tapped hole for holding the sealing washer? What you need there is a shoulder bolt or a bushing on a standard socket head screw, a back up plate to hold the gasket and a second plate to hold the gasket to the first plate. The spring has to be short enough to not coil bind when the cap is closed.

#332027 - 09/06/10 5:16 pm Re: gas cap rebuild [Re: Alex]  
Joined: Oct 2006
Posts: 3,017
Bob S Offline
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Bob S  Offline
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Joined: Oct 2006
Posts: 3,017
, Lower -Lower michigan
Originally Posted By: Alex
Steve, is it the alloy GP-style cap? I can't seem to get that one to seal up either. Both my victor tank and my rickman have this cap and I've tried all kinds of new seals and no luck so far. Would like to know how to crack the code on these myself.

I've fixed the twist-lock flip cap on my '67 royal star by cutting a rubber gasket out of 3/32" neoprene rubber sheet. That one worked well right away.



Keep a close eye on the neoprene.Gas will "wrinkle" up regular rubber, I jus happened across this subject, and remember like circumstances


Bob S
Street Rods, Kustom Kars,A BSA,Cushmans,H.Shadow ACE, Now a 2004 triumph america . "More than enough!!!!

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