I had 410 miles when I noticed smell of gas.Looked under passengers and gas was leaking after fueling.The plastic ring that on top of tank was one turn loose.Something you might want to check.

[2015 Z Force 800 53/Trail EPS]

Thanks for the heads-up. Will check it.

Exact Same issue here....barely ten miles on it...snugged that black ring cap....stopped the leak.

I just noticed mine was leaking I got at least a half a turn out of it by hand but it doesn't seem like it wants to stay tight

[2015 Z Force 800 53/Trail EPS]

I just noticed mine was leaking I got at least a half a turn out of it by hand but it doesn't seem like it wants to stay tight

You can go a little more by using something to tap on the fins. I used a large screwdriver and hammer but remember, plastic threads.....

I tried that but still loosens up easily

If the threads are loose, try Teflon tape. Just a little bit will do it.

[2015 Z Force 800 53/Trail EPS]

I guess one could always spin it off and slap some thread lock /loc-tite on it.