FUEL TANK

[jim tylee]

Need to do a small weld quite near fuel tank on sj413 samuri is there a vent pipe on this tank and if so where does it run to ??????
thanks jim

[Jordi]

Vent pipe runs off the top of the tank onto a pipe on the fuel filler neck on the inside of where the fuel cap is.

[jim tylee]

Okay thanks for the info....loud bangs make me jittery
jim

[jim tylee]

Every time i undo the fuel cap there is a loud hissing as though it is pressurized until cap is released
i guess this is normal on my sj413 anus
jim

[Ladaman]

It doesn't sound normal to me. I'd suggest the vent/breather pipe is blocked. The hissing will be air rushing into the tank.

Does it run okay on long journeys, as I'd expect issues if the vent was blocked?

[jim tylee]

Yes its done it for many years ...journey of 80 miles no problems.....
Jim

[Ladaman]

Don't worry then.

[Tramp]

It is normal, mine used to do it all the time, behind the fuel filler cover in the back there is the one way 'breather' valve (it's orange and black) you can take it out and blow through it to make sure it is ok, I took mine out because of this 'sucking' and replaced it with an inline filter but it made no difference to running, so I put it back in! speaking to people on here made me realise it's normal.

[jim tylee]

Thanks its such a loud hiss we thought it might be a snake trapped in there ......
cheers Jim

[Ladaman]

It could be a fuel ADDER tive