Gas Cap Leaks

copmagnet80cc

New Member

Jan 7, 2014

84

2

0

Ohio

Jun 20, 2014

• #1

On my 2 stroke engine kit, the tank vibrates real bad somtime when I get in the higher RPM's and my gas cap starts vibrating REAL bad..like it starts shaking and everything and gas starts coming out of the top..not sure if its the spring thats not strong enough or what..just wondering what I can do..

 

2door

Moderator

Staff member

Sep 15, 2008

16,302

175

63

Littleton, Colorado

Jun 20, 2014

• #2

I've used a rubber 'O' ring under the rubber gasket in the cap. Always worked for me.
Most hardware stores should be able to help you. If possible look for an 'O' ring that is gasoline compatible. It'll last a lot longer.

Tom

 

crassius

Well-Known Member

Sep 30, 2012

4,032

158

63

USA

Jun 20, 2014

• #3

had a few that wouldn't stop leaking - soldered shut the vent hole inside & drilled one thru top - that usually works, but can still sweat out a little when tank is full

 

copmagnet80cc

New Member

Jan 7, 2014

84

2

0

Ohio

Jun 20, 2014

• #4

2door said:

I've used a rubber 'O' ring under the rubber gasket in the cap. Always worked for me.
Most hardware stores should be able to help you. If possible look for an 'O' ring that is gasoline compatible. It'll last a lot longer.

Tom

Click to expand...

Thats a good idea..do you happen to know the diameter? If not I can find it out..thanks anyways though!

 

copmagnet80cc

New Member

Jan 7, 2014

84

2

0

Ohio

Jun 24, 2014

• #5

Just found a rubber gasket and tried it out..no more leaks...thanks all!

 

crassius

Well-Known Member

Sep 30, 2012

4,032

158

63

USA

Jun 25, 2014

• #6

just noticed that some caps have a gasket with rectangular cross section, while the ones we use have a triangular cross section (I rarely look inside cap on repair bikes)

seems to make a difference