125-200cc Gas Cap Leak/Splash - Anyone Else?

Yesterday, my son pulled off the practice track as the top of the gas tank on his 2012 CR125 was wet with gas that was somehow making its way past the gas cap. Not sure if the threads are a bit worn or cross threaded or if the bladder is worn. Visually, really hard to identify the culprit. The odd thing is that it did not do it when the the tank was 3/4 full but did start doing it had less than a 1/4 tank.

Anyone else experience this?

I've read of this happening before. Check that the seal on the inside of the cap is in its proper place.

I replaced my cap with an Acerbis cap. Haven't had any leaks since.

kuzin stinkies got the same deal where d you get an Acerbis cap??

I think I bought mine on Amazon. They are available on ebay for $14.95 shipped. Get the large size!

Hi Caferacerman,

Check the cap, it has a circular black seal that goes up inside cap and when removing cap it can become dislodged and if not careful drop and loose forever.

Just something to be aware of I guess.........................

my gasket had a small crack and just replaced it with OEM

Do you mean there is a gasket in addition to the bladder?

the bladder has the gasket built in

un-thread the rubber from the cap and re-thread it following the threads. then install gas cap with added emphasis. seems to have stopped my leak issue on my WR300.

I had the same problem on mine to start with. The gasket wasn't fully seated properly in the cap. Fixed that little problem now its leaking again. Tried tightening the cap a bit extra. Still having the problem so I am going to switch over the to the billet accessory cap to see if it fixes the problem.