Update: After a long week in Wales riding TET and fueling up more often than usual, it appears that this mod really works! It didn’t turn fueling-up into super fast one, however it no longer takes 5 minutes to fuel up from empty tank to full! So I am happy with it!

If you own ajp pr7, you will know how painfully boring fuel up on ajp pr7 is!

After a closer look at the breather pipe and fuel tank I realised that the acerbis tank actually has two holes to let the air out and in!

However, both fittings have very small holes in them- only 3 mm or so. And to make things more interesting – two pipes that come out of the tank, join into one before reaching 1 fitting located on the fuel filler.

While looking at all that, I asked myself:

“why not two?”

And that’s what I did, sort of..

First of all I took the fittings out of the fuel tank, and noticed that the fittings themselves had very thick sidewalls. Using a slightly wider drill bit I widened it up by another mm.

Next was to reroute new pipes, I used braided pipe as I ordered the wrong one, and since braided is thicker too, I had to reuse some of the older piping. Joined both new pipes at the point where filler meets the fuel tank, and from there up- old thinner tubes.

Fittings

To hold the new tube to the air filter box, I used tube fitting like originally was used. Funny enough, AJP used the same fitting to hold the rear brake line attached to the swingarm! Replaced that with a normal hose clamp (P-Clip) to keep the brake line secured. Attached the fitting to the airbox with a couple of rivets – same way like the original one.

And for the final bit, to attach a breather tube to the fuel strainer I used barbed bulkhead tube fitting as I couldn’t find anything better at that time, I just cut the unnecessary end of it as well as shortening the barbed end to about 1cm.