PRO BAT 10 Pack Two-way Motorcycle Fuel Tank Air Vent Gas Cap Oil Vent Breather Hose Tube Gas Tank Cap Vent for Dirt Bike Pit Bike ATV All Factory CRF XR CR All Quads All Off-road Motorcycle, Blue

From 10 pieces, all 10 reacts very different in a test, but what is most disappointing is that is suppose to be a one way air pass but in the ones that works better (maybe 2 from 10 that comes) is a free pass in one way and a minor pass in the other way, not a completely close.Maybe works for other, but for my needs don't works as expected

Should have figured it was junk at this price. I was skeptical and did a cutaway. You’re better off just having a hose without a vent since this is no different. Does not contain any type of check valve (one way valve) to allow fuel tank gasses to exit, but not allow debris or water in. This has no such thing. All it is, is a fuel tank ornament with a pinhole.

Would not use these for a dirt bike anything that gas could leak on your nuts. These are pretty tube cap ends but 8 out of 10 are both way breathers so fluid can come out and the other 2 either I needed to drill through to work in any direction or throw away. You guess which. Anyway, gave a 3 star because they were good enough to let air into gas cans, my GoPed and generator

The description says that the vent has a valve to stop fuel from coming out, it doesn't. Seller remedy? Only put a little gas in the tank, don't fill it. Useless product.

I will be honest, I know nothing about these items. I just bought them for my brother, who works on motorcycles. He asked me to purchase these so he would have them. He told me they were of good quality and works as they should.

These work great on our KLX110. I thought it would be handy to have a bunch of spares, but it hasn't come off in several hours of riding (and a few spills) since I installed it, so the spares may never get used.

So I like to change things up . Well it took me 20 years to figure out that every chainsaw has event for its tank and for some dumb reason then make it so I can clog well I think I've lost three or four styles over the years from maintenance from the guys not changing those out so guess who's working on a modification to be able to put these on to a chainsaw

These are simply a vent, which is what I expected them to be. But they fit tight and there is no leakage. They look good and you get 10 of them for a good price. I really like them.