This is an OLD mod from the Chromeheads forum (which I did on my old R1200c) to increase the fuel tank capacity. The fuel neck in our bikes reaches FAR down into the tank, and, as a consequence, leaves a MASSIVE air pocket where gas can't occupy when you fill up.
The mod is to drill a small hole near the top of the fuel neck, like a 1/8" hole, to allow air to vent out while you're filling gas. However, this mod can sometimes result in overflowing the charcoal canister, thusly leading to a second mod of deleting the charcoal canister as well.
Also, while I typed this up, I headed over to Chromeheads to see if I could find the old post...and I couldn't. Maybe they took it down or it got lost when they transitioned to the new site???
Anyways, here's another person who did the mod so you can see what I'm talking about: https://motorcycleinfo.co.uk/r1200gs-fuel-tank-filler-neck-modification-fuel-filler-mod-indexfcd2/
If you do this, for the love of everything good in this world, PLEASE remove the filler neck from the gas tank BEFORE drilling the holes!!!!! We don't want to hear any KABLOOEY stories.
And yes, I 100% intend to do this mod to Alcina! I have been more than irritated that I'm unable to get the full listed tank capacity in her every time I'm at the gas station
Mike
The mod is to drill a small hole near the top of the fuel neck, like a 1/8" hole, to allow air to vent out while you're filling gas. However, this mod can sometimes result in overflowing the charcoal canister, thusly leading to a second mod of deleting the charcoal canister as well.
Also, while I typed this up, I headed over to Chromeheads to see if I could find the old post...and I couldn't. Maybe they took it down or it got lost when they transitioned to the new site???
Anyways, here's another person who did the mod so you can see what I'm talking about: https://motorcycleinfo.co.uk/r1200gs-fuel-tank-filler-neck-modification-fuel-filler-mod-indexfcd2/
If you do this, for the love of everything good in this world, PLEASE remove the filler neck from the gas tank BEFORE drilling the holes!!!!! We don't want to hear any KABLOOEY stories.
And yes, I 100% intend to do this mod to Alcina! I have been more than irritated that I'm unable to get the full listed tank capacity in her every time I'm at the gas station
Mike