Sucker

[LAURENCEAUX]

If expansion happens because any venting is being prevented, then you'll have to show it's a fault happening since delivery and therefore the original supplier should resolve that under warranty as they unboxed and setup the bike and made it not fit for purpose at that time (because of the slightly kinked hose?), but, if you suspect the problem was created by anyone other than the original supplier, you will have to prove that and pursue that party yourself.

 

The RE warranty on new bikes will not be honoured if RE suspect user interference or misuse caused the problem, howsoever caused; then you would have to hope any goodwill gesture doesn't cost too much.

 

Petrol is sold at 15c on a UK forecourt and will expand a lot as it enters a hot fuel tank, which will pressurise and expand the tank if not allowed to vent the expanding fuel. This is why you should never brim any  tank, but always leave at least an inch of air above the fuel which can be compressed safely to offset fuel expansion.

 

I would unkink the vent pipe(s), never brim the tank and leave the tank as it is, if it is not split and leaking. A bit of paint will prevent rusting.

 

I would not anticipate any warranty work as the warranty it there to help sell the bike, not to actually address issues after that sale. (I am very cynical as you can tell).

 

The bike has it's first war wound now.