Replaced the stocker R6 tank cap with a Vortex and had to use the seal-all around the base so it wouldn't leak...now after I run it for a while, it creates a suction in the tank. I'm sure if I ran it from full to empty like this, it would suck in the tank...is there a way around this as a breather?

 

there is a little set screw on the under side of the cap that you have to take out so it can vent to the over flow tube .

p.s gas usually makes pressure when shaken and heated not suction

 

Thanks for the info...didn't know since I bought it used

 

if you take that screw out for it the breathe gas wont come out when youre in a wheelie and you have a full tank? just wondering cause i have a gineric one and gas comes out. wondering if the same thing happends with the vortex

 

My vortex cap never leaks. I had one of the cheap copies off ebay and it leaked really bad.

 

don't know about the knock off but with the vortex it vents to the well around the filler hole and thats where the vent hole is

 

I pulled out that set screw and a check ball fell out...is this normal?

 

yep just make sure the gasket around the base of the cap is good and you should be set , some times the pressure in the tank will blow that gasket out ...

there should be no pressure now that you took the set screw out

 

i need to try it every time i open my gas cap it is like a volcano

 

yep , i think that check ball is supposed to let the cap vent but it never does , it's probably in there so no gas splls out if the bike is upside down

 

i got my vortex gas cap and base yesterday and went to take out the screw but noticed theres 2 screws with hex heads..

one under the base and the other right beside it but on the opposite side of the base.

which one do i take out? or do i take both out?

 

two ???? never seen one with two but i haven't looked at any new ones ..

there will be a check ball under one of them and thats the one you want to take out , if there is a check ball under both then just make sure the one you take out is venting from the bottom of the threads on the base to the well around the filler hole

 

two?

Mine only had one

 

did it work

 

I ran vortex and never leaks. its a must!

 

i cant find the set screw hole on my cap at all

 

oh And Its A F4i

 

I dunno, my damn breather tube has a pinhole leak inside the tank...drips gas out of the breather tube because of it

 

it's not in the cap it's in the base

 

I suppose I can just run the stock breather line and cap off the overflow nipple under the tank?