Gravity I would imagine Paul, Just been looking it up myself now you have mentioned it. Seems a great addition whilst my tank is off the 996 and the pump is out. Push it in and mould it in it says.
·ELIMINATES FUEL STARVATION UNDER HARD ACELLERATION, CORNERING AND OFF ROAD SITUATIONS.
·ELIMINATES FUEL FROTHING.
·REDUCES RISK OF EXPLOSION IF TANK CATCHES FIRE.
·REDUCES THE DISCHARGE RATE OF FUEL SPILL IF THE TANK IS RUPTURED.
·ELIMINATES FUEL SLOSH AND UNWANTED WEIGHT TRANSFER GREATLY IMPROVING RIDER STABILITY WHEN ITS NEEDED MOST.

Its already in the 848 tank ;)

the red one.......

seriously tho, do you squash it all in so it totally fills the tank and you can see it with the cap off?

I usually pack it in using the biggest Chunks I can squeeze through the hole, although the size does depend on where in the tank they sit as sometimes the front of the tank can be quite shallow

Is there a UK supplier of this or similar?

Merlin Motorsport based at Castle Combe use to sell it, not sure if they still do.
Otherwise you can usually find it sold on Ebay

ebay is the link Craig copied from - £5 per 2l block

sorry,missed the link.You got it?

no just searched ebay fuel cell foam

http://www.ebay.co.uk/sch/Motorcycle...p3286.c0.m1538

Craig