[Dr. Feelgood]

I know I've been blowing up the mechanics corner with questions but just one more.....what is this tube on the gas tank for?? It was just like that when I got the bike....not attached to anything. The bike runs fine, but I'm kind nervous about leaving it open like that. Anyone know what its for...what its supposed to hook up to?

 

[GPZBob]

Just a guess but I think it's probably fuel vapor and originally went to a charcoal canister or the bike equivalent. After '85 or so the EPA made bikes control that as well.

 

[FixXxer]

Just a Vent...should be connected to a tube that goes anywhere really...Usually pointing downward

:twisted:
Have a good one.

 

[Dr. Feelgood]

if it is for fuel vapor can it be capped?

 

[GPZBob]

Don't cap it as it causes the fuel system to try to find a release for the vapor pressure and can push the needles off their seats causing flooding.

 

[Dr. Feelgood]

ok cool, can I leave it as is or should I run a tube so it vents somewhere else. Does it need a filter of any sort?

 

[GPZBob]

You can pretty much leave it as is. The only time gas can come out is either the bike is upside down (bad) or on fire (very bad).

 

[Dr. Feelgood]

hehe......will do....thanks again for all the help!

 

[1Adam12]

I know I've been blowing up the mechanics corner with questions but just one more.....what is this tube on the gas tank for?? It was just like that when I got the bike....not attached to anything. The bike runs fine, but I'm kind nervous about leaving it open like that. Anyone know what its for...what its supposed to hook up to?

Usually went to a charcoal filter down the way from the tank and exited at the bottom of the bike. Make sure it doesn't get clogged as this will cause your engine to run rough. I had an 86 zx600 (ninja 600) but it was a CA model and had 2 tubes instead of one.

 

[Dr. Feelgood]

Yeah I had a feeling it was going to something like that. I know on my car the charcoal lines can be capped since the tank had alternate vents but wasn't so sure about this one. Thanks everyone for clearing this stuff up.