I didn't notice on mine when I filled up a couple of times over the weekend.
Sounds like the breather in the cap is blocked and not letting it equalise. As fuel is depleted it creates a vacuum in the tank which can lead to the engine starving of fuel.the fuel tank lid is difficult to open..... the inner pressure seals it to the tank and I have to strongly pull out using the lock's cover till air comes in (pppssssssss)
someone else has same issue?
Yep, I've not seen it personally on a bike but you'r right, I have seen it on a Peugeot with a plastic fuel tank and a Scania truck with aluminium. You would hardly believe the fuel pump would have the power to do it but it can.There were also stories of the tanks caving in on some of the early SSie models. It seems there was a vacuum created in the tank due a blocked breather. When the bike was garaged overnight the air in the tank cooled down increasing the vacuum such that the tank imploded Not a nice sight to open the garage to in the morning. You should definitely get that breather checked.
All for the sake of 1mm hole. Looks like the standard cap too.Like this -
The breather path is integrated into the cap and will consist of one way valve usually with a ball bearing and spring in-case of going up-side down shutting off the flow.ok, where the breather is?
Just a thought, after your dirty weekend it could be the breather exit tube below is choked with mud ?ok.... will tell them on first service I'm going to do soon
Did it work ?. The reason I ask is because it lets air into the tank as the fuel level drops. The air needs to blow from the outside inward as there is a one way valve in the line. It could actually make it 'worser' by jamming the valve the wrong way.today at 1st service, they blown compressed air into the small hole in the middle of the two nuts on the left. here is picture, you can see it on left (gold spot)
this is the tank breather.