Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: Gas Caps

  1. #11

    Re: Gas Caps

    You likely can just poke a nail into the vent hole on the inside of the cap and flip the little plate that is spring loaded onto it's side and leave it like that fixing it forever!

  2. #12

    Re: Gas Caps

    If your bike is running fine, it's not possible that your cap only vents one way even if you only can blow one way with your mouth. If it would be so, you would experience trouble to run again a short while after a ride, as the petrol and air inside the tank expands from the heat of the engine and is vented out, and when the tank cools down the air contracts. If that would happen, then the only way in for air would be through the closed float valve. Vacuum would form in the tank and no petrol would not reach the carburetor and the bike wouldn't run more than a short while on the gas in the bowl, or at least have running problems. If the cap valve only would work one way in the other direction, air compressed in the tank would make the gas overflow the carburetor.
    Last edited by Charlie1012000; 01-22-2020 at 06:16 PM.
    Charlie 101

  3. #13
    Join Date
    Sep 2012
    35 mi east of Pittsburgh

    Re: Gas Caps

    Yea, not to beat a dead horse but my caps looked just like the style pictured only with a neoprene/cork gasket. After some testing I determined they do indeed vent, just not with very minimal pressure as I would have liked for my old tanks. I drilled a 1/16 hole in the little disc/plate in center that Indianut referenced and no more pressure build up. I did not drill the whole way through.
    Jason Z - S.W. PA
    48 Chief

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Gas caps
    By DaveAus in forum Carburetor, Air Cleaner & Exhaust
    Replies: 0
    Last Post: 05-22-2019, 05:55 AM
  2. gas caps
    By nmaineron in forum Sheet Metal, Paint & Finish
    Replies: 4
    Last Post: 02-04-2017, 11:33 AM
  3. Gas Caps for '62 FL
    By BigLakeBob in forum Motorcycles & Parts Wanted
    Replies: 11
    Last Post: 10-04-2015, 07:38 AM
  4. gas caps
    By Fly Brod in forum Harley 1936-1964
    Replies: 5
    Last Post: 08-19-2012, 08:42 PM
  5. Gas Caps
    By axeric in forum Member Projects
    Replies: 22
    Last Post: 03-08-2011, 08:14 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts