Gas tank pressure

[Teamblue4]

Gas tank build's pressure and make strange noises, anybody else notice this? It will blow the cap about 4" off the tank when you loosen it

 

[lovesledding]

I have the same problem, it just started doing that this year.

 

[Motorhead]

I got the fuel tank 90 degree fitting updated last year. Can’t remember but I think it went from red to black but anyways, mine did the same this year, but I do not see it as a problem whereas my sled just runs strong, start fine, idles fine and mpg seems much the same as usual. Max Spool 16 all the way!!!

 

[IH8CROWS]

Mine does it from day 1. Especially when heating up the garage quickly and it starts whistling.

 

[jonlafon1]

Whistling is very normal. This has been discussed on here. Just make sure vent line isn’t pinched. It’s all good on this venting issue. Don’t overthink this guys.

 

[Big_Phil]

The vent is designed to hold a certain amount of pressure for emissions. Less gas fumes into the atmosphere.

 

[Hammer70]

Mine does exactly same thing and also another 3 sleds. It’s normal due to emissions control so no HC get released into the atmosphere Normal.


Pan

 

[Sevey]

When I store the sled or leave it in a warm garage on trips I always loosen the cap. Lets any expansion/contraction inside out.

MS

 

[stevewithOCD]

The funny thing is. when i first owned this sled i kept hearing this high pitch dog whistle type of noise coming from the garage.
I thought the Government was tapping my garage with secret spy equipment trying to figure out how a 50 year old skinny white boy can ride so hard & still look 35 after 300 miles.
Turns out it was my gas cap.......