Join Date: Apr 2007
Location: Oxnard, CA, USA
I drilled mine when I first got the bike. I can squeeze in just barely under 7 gallons now. Like WL said, don't top off and let the bike sit, but for filling and getting right back on the road it works great.
If you're really worried you can also remove the charcoal canister, but most folks don't bother with that.
It's pretty easy to pull the filler neck out, but the fuel gauge strip stays attached so it's a bit fiddly. Just make sure to keep the holes below the top sealing surface.
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032
All lower 48 states plus Alaska on the K13GT in two weeks . . .
Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...