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gas cap rebuild #331882
09/05/10 10:41 pm
09/05/10 10:41 pm
Joined: Aug 2001
Posts: 63
Central Ohio
Steve in Ohio Offline OP
BritBike Forum member
Steve in Ohio  Offline OP
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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Re: gas cap rebuild [Re: Steve in Ohio] #331894
09/06/10 12:35 am
09/06/10 12:35 am
Joined: Sep 2002
Posts: 7,813
Seattle
Alex Offline

BritBike Forum member
Alex  Offline

BritBike Forum member
Joined: Sep 2002
Posts: 7,813
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.


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Re: gas cap rebuild [Re: Steve in Ohio] #332007
09/06/10 4:00 pm
09/06/10 4:00 pm
Joined: Jan 2004
Posts: 3,823
ca, us
D
DMadigan Offline
BritBike Forum member
DMadigan  Offline
BritBike Forum member
D
Joined: Jan 2004
Posts: 3,823
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.

Re: gas cap rebuild [Re: Alex] #332027
09/06/10 5:16 pm
09/06/10 5:16 pm
Joined: Oct 2006
Posts: 3,017
, Lower -Lower michigan
Bob S Offline
BritBike Forum member
Bob S  Offline
BritBike Forum member
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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