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Jaz Auxiliary Fuel Tank

Bo Griffin's auxiliary fuel tank:

Some notes on my Aux. fuel tank: It is a Jaz 4 gallon tank. The air vent hose is metal-wrapped (I don’t recommend it). I’m not sure what "type" of fuel line is running to my engine (the metal-wrapped didn’t work because it is not flexible enough. The one that we used was suggested by my mechanic because of it’s flexibility and dependability – time will tell.) The fuel tank is grounded to my luggage rack via an electrical wire. A thin piece of sheet metal is glued to the bottom of the tank to protect the tank from wear (mostly because it is larger than my luggage rack.). In addition, there’s a small piece of rubber that is glued to the bottom and front of the tank (also, for protection and to keep it from moving around). The tank is secured with two nylon straps. (And, because I’m not comfortable with that yet, I put a bungee web strap on top.)

  • Overflow, or vent tube
  • Bungee web, just to make sure it doesn’t come off, until I feel safe
  • Thin piece of sheet metal protect the bottom surface
  • Two ¼" wood slats lift the rear of the tank for better drainage

  • Electrical ground wire [running vertically down side of tank from filler]

  • Two nylon straps, securing tank around luggage rack and backrest
  • Fuel line running to engine
  • On/off valve for fuel flow [ red, in middle of hose]
  • Quick disconnect (from Aerostich) to remove fuel tank, or fill another tank with fuel if necessary [white plastic, at bottom of hose]
  • Thin rubber strip to protect from rubbing. Purchased at Home Depot

I took my first trip (600 miles) with it yesterday. It worked fine. I took Jack Tollett’s advice and ran on my main tank for the first hour before switching my aux on. It seemed to work fine this way. I could tell that the fuel from my aux was backing up into my main though. The gravity was relocating the fuel that my engine wasn’t needing at the time. A good reason to burn (at least) an hour’s fuel off before switching.

My two nylon tie downs don’t seem to be working well. My tank moves to the right for some reason. I tried to install a small elbow bracket to hold the tank in place and that doesn’t work. The bungee web helps make me feel better, but it’s certainly not the answer. I have two nylon straps that have ratchet tighteners, but they seem too heavy. I’m thinking about trying to find the bottom of a plastic box to bolt to my luggage rack, and then strap the fuel tank inside of that? We’ll see...

Editor's cover his ass note: Both safety and the Iron Butt Association demand that a fuel cell must be firmly fastened to the bike. The current mounting of Bo's cell wouldn't pass these tests. When mounting your fuel cell, be absolutely sure that it is properly bolted to your bike. This work is always done at your own risk.

Article By: Bo Griffin

Updated January 2005 

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