Wednesday, November 12, 2008

Racks and Side mount tank

Many have wanted to add a larger fuel tank to the 96 and up ATK.

Lets start with the subframe Mods. In the Pic above you can see all the added brackets. The subframe had a triangle brace welded in on each side to add some strength as I was adding Pannier Racks as well. First thing is to mount the Tank using the Mount hole in the subframe just fwd and below the Seat mount hole, don't tighten the bolt just leave it snug so that you can pivot the tank on the bolt. Adjust the tank so that you have a slightly downward tilt to the outlet. Then you can make a cardboard template of the Fwd mount, You can see the "U" shaped mount in the lower left side of the pic this is the mount I am referring to. After this you can make the rear mount. Mine is made out of Aluminium Angle and is really two parts. Part one is a loop that goes from the subframe to the rear rack mounts in the rear fender. This will allow you to carry more on the Rack as well (stock this bolts to the Plastic fender in the rear and about 5 lbs is all it will hold!) and use the rack as a brace. After you do this you can add the piece of angle to the rear tank mount. This is the part with the two holes in it towards the back in the pic. after this you can mount the transfer pump (if you are using) to the bottom of the Airbox or the "U" mount or anyplace you want as long as it is at or below the outlet of the tank. The neat trick if you are using a Pump with a Regulator between your main tank and Carb you can just run a line from the outlet of the Aux tank to the Vent hole in the cap of your main tank. As you draw fuel out of the Main it will draw fuel out of the Aux tank as the only vent in the system is now in the Filler cap on the Aux tank. Works great but ONLY if you have a pump as gravity will not create enough draw. In the picture below you can see the added fitting (Pingle makes these) I am not using it yet but its there for when I need it. In the First pic you can also see how I trimmed the side panel to fit to the tank.

I rigged mine to work without the Pannier Racks but once I put them on I never got around to taking them off (but I could!) so I have not used it without.

Now for the Racks...

I wanted to use lightweight Panniers (ZEGA) as they are watertight and not to big. I chose to use 35 liter units but they also make a 29 and a 41 liter unit. These are not the cheapest but you could use 29's to get a couple more inches narrower if needed. I order direct from Touratech though Alaska Leather (see my links) and I ordered the Zega cans undrilled so that I can adjust them how I like them. I also ordered some mount hoops to use as a example. The hoops from Touratech are 18mm od and carbon steel so are heavy! I did not want to add all the extra poundage so I bent my own hoops out of 5/8 .065 wall stainless. This made the whole rack assembly weigh the same amount as the two Carbon steel hoops that I got as a example.

First thing to do is figure out where you want the Panniers to sit. To do this I used a 2x4 and hung both cans from it using straps to figure the angle and tilt as well as the overall positioning. I angled them in alittle at the front as well as gave them some tilt in at the top. I do not carry a passenger so I moved them forward as much as I could while still allowing for leg movement during riding off-road. Remember those cans are solid and in a fall you can break a leg with them (This happened to a friend) so give yourself some room to move. Also allow for at least 1/2 in. of room at the back of the hoop for the mounts on the Cans. Plan for everything. I made the loop that bolts to 2 holes in my subframe, this bolted to the subframe at 6 points (2 each side and two on the subframe extension where the top rack bolts through the fender.

Then I bent the loop that goes over the Tank on the Left and the Exhaust and side panel on the left. Next came the braces to the lower subframe to Main frame mounts on these the one on the left was sandwiched between the subframe and main and the one on the right is outside the subframe tab. only tack weld at first so that you can bend everything around. I adjusted the tilt then added the lower rear loop that controlls flex at the rear. after this you will need to drill and mount your cans BEFORE you make the second upper mount. These are not in the above pic. as I had not done this yet. In the top rack pic you can see these as well as how the two upper hoop mounts bolt through the existing holes in the frame and into nuts welded to the other section of the Pannier frame. Some were from the outside in and one on the right was from the underside out. the right side also goes through the muffler tab and the front left is a bolt for the side tank as well.

You can see the rear right upper mount in the above pic but I have not made the fwd upper for the left yet. You can also see the cans with the mounts installed in the background. After you have everything tacked and placed where you want it you can remove the whole assembly and finish weld.

Below you can see the Mounts that blot to the hoops for the Zegaflex bags. One of the nice things about these is that they lock on as well.

Oh and by the way for those that are interested:

Bike with both the main tank and side tank Full and the hard cans mounted but empty it weighs in at 330 lbs on a certified scale at the airport. I also have about 2000mi on the racks so far with no troubles. More in the next post. Peg mounts.

And yes it has studded tires in the snow pics.

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