k13gt fuel Neck - K-Bikes.com - Excellence in Motion
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post #1 of 6 (permalink) Old Mar 21st, 2009, 5:43 pm Thread Starter
Join Date: Jun 2007
Location: NYC, NY, USA
Posts: 19
k13gt fuel Neck

Hi all-

Yup, I'm curious if I should drill the K13gt fuel filler neck like I did on the k12?

Why not an instant yes? Well the neck is different. The 13 had an orange plastic neck that looks a bit different. The 12's was metal.

Thanks in advance,

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post #2 of 6 (permalink) Old Mar 22nd, 2009, 3:54 am
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Location: Evansville, WI,
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Drill the filler neck?
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post #3 of 6 (permalink) Old Mar 22nd, 2009, 6:06 am
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Location: Brussels, , BELGIUM
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one possible reason

maybe about spilling gas:

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post #4 of 6 (permalink) Old Mar 23rd, 2009, 7:49 am Thread Starter
Join Date: Jun 2007
Location: NYC, NY, USA
Posts: 19
Originally Posted by GillyWI
Drill the filler neck?
Yes, sorry, thought it was common practice. Most of the new BMWs intensionally have a significant gap of air in the top of the tank. A totally filled tank can overflow a little, filling the charcoal canister, as the fuel changes from below ground temp (<50) to small vessel in the sun temp (80++). BUT its a bunch of additional gas. So if you don't fill to the brim then leave the bike (if you fill then ride) you'll be fine.

On most BMWs you can fill them pretty high if you wait, add, wait, add, wait, add. But if you put a hole or two in the filler neck towards the top, the fuel can more easily displace the air.

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post #5 of 6 (permalink) Old Mar 24th, 2009, 10:08 am
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Join Date: Nov 2007
Location: Suwanee, GA, USA
Posts: 19
Taking the neck out to drill

Is the easy to remove to drill the holes into it? Do I just remove the ring arount the top and lift the neck out or is there a trick to it?


07 GT Blue
09 HD Ultra Red & Gold
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post #6 of 6 (permalink) Old Mar 26th, 2009, 12:21 pm
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Join Date: Apr 2007
Location: Oxnard, CA, USA
Posts: 3,143
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.

Pacific NorthWet
'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...
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