big tank vs stock tank
On my 08 WR450 yamaha I've run three different brands of tanks
Two of them skirted the engine enough to cause the fuel to boil (insulating the under side made it worse, block the little air gap there was), was very dangerous, if you removed the fuel cap, fuel would blow out of the tank like coolant in a hot radiator.
Some big tanks block radiator air flow enough (slow going trails) to cause the engine to over heat
Imagine fighting threw a tough trail, boiling fuel and overheating engine not a good combination!!
The NEW Accerbis tank with wings about 3.6gals is the only tank that work for me on the WR, No boiling of fuel or over heating. Just more top heavy fuel weigh sloshing around on a bike that's already top heavy akward.
I,m not a fan of big tanks but some times they are a necessity. I use a Clark on my YZ250 works good, for a big tank! Being a two stroke it's not as top heavy as the four strokes.
My point, be very careful if you buy after market tanks
My 2010 570 works unbelieveable well, its GREAT, if I hang a BIG tank on it I will loss some of the great feel and handling this bike has when riding hard, I,m not welling to ruin any of that great balance designed into these HUSABERGS.
I do need more fuel capacity for 100 mile rides, so I will go with the SUB- FRAME tank, sounds like it will be a great option!
Will not cause engine overheating, fuel boiling or affect handling givin its location
have a great ride
haskell in Idaho