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Auxillary Fuel Tank installed...NEW PICS !!!

Simon,
Yeah....for $175, it shoulda just fallen into place! But with as slow as KTM/Berg operates, I guess they felt that this early aux tank design (for 98 thru what, 00?) was "close enough". And because no one is willing (or able) to make a larger main tank, this is the only way to go for now and still have some comfort in fuel range. What I don't yet understand is why the hardware supplied was missing all the "adel" clamps (for mounting the tank sides), all the 6mm bolts and the proper vent lines (ALL shown as "provided" in the parts list with the kit). The only "bolts" provided were totally worthless SHEET METAL screws...WTF, over!

One benefit of this gallon of extra fuel in this aux tank is that it has a lower CG than an extra gallon placed in the main tank. Food for thought.....
 
rustie I`am glad you got it straightened out.I have a question does the under seat tank have a inline petcock so you can turn it on and off.I will proably stay with gas cans for now but I would be interested in how it works.Thanks and take care.
 
Wildbill,
Yes, there is a petcock that will allow you to shut off the extra tank if you want. This tank was difficult to install, but I did finally get it in. Now I have to relocate the CDI. I will probably stick it to the left frame side up by the steering head with double sided foam tape. It clears the fork tubes nicely if you remove the rubber sleeve....and the foam tape will act as a vibration absorber as well. Actually, this mounting will look just like a KTM 525 EXC ignition install, but without bolts....and the latest 3M double sided foam tape is VERY STRONG (VHB = Very High Bond). Hope this helps......
 
Well damm.....FINALLY.....
I finished the aux tank install! Obviously it took extra effort with a heat gun to get all to fit properly. One of the harder items to install were those two adel clamps on the left and right side of the tank. After some real "force fitting", the clamps finally took a good "set" and now look like they actually belong there.

As to the ignition, I came up with a location and mount that I don't think has ever been tried before. What I did was to remove that worthless top vent petcock on the aux tank, tap the center hole for a 1/8" pipe plug (the allen socket type), and screwed the plug down until it's flush with the top surface of the tank (sealed with teflon tape too). This then allowed me to use those two petcock mounting screws to hold a simple bracket I made to hold the ignition module right on top of the aux tank. The nose of the ignition is now real close to the aux tank cap with the wiring harness end just barely touching the foam air filter (perfect amount of room). This location doesn't require any lengthening of the ignition harness because it is so very close to the stock location....and actually looks factory. I also left the aux tank cap undrilled and then drilled my own 1/8" pipe threaded vent into the top rear corner of the tank. This location will also remove the most air from the tank. I used a small brass, right angle 1/8" pipe thread by 3/16" barbed fitting to allow for connection of the vent hose....which I then ran along the left side of the frame to finally "Y" in with the original tank cap vent (I ran this vent line right along side the filter).

I'm too lazy to post pics (would take almost as long as it took to make the bracket), so I'll try to describe it here:

The ignition module bracket I made was from a simple strap of 1-1/2" wide by 4-1/2" long by 3/32 thick (.094" - 2.4mm), mild steel sheet metal. I left half of the 4-1/2" length (2-1/4") the full 1-1/2" wide, but reduced the remaining section (of the other 2-1/4") to only 1" wide. This 1" width is NOT centered, but rather all on one side. In other words, I cut away a 1/2" strip by 2-1/4" from one side only. I then copied the factory "arrowhead" shape of the original ignition mount to this narrowed section and cut it to match. I next drilled the holes required to match those available at the old petcock location, but these two holes are both centered along the edge of the wider section (along it's length, not the end). I then bent the "arrow head" shaped section back upon the wider 1-1/2" length, making it a narrow "U" bend with about a 1/4" radius at the bend. Because the screw holes are at the wider section, you can easily install the screws without interference with the "arrow head" end.

Once screwed down, I now had a very ridgid mount location only a few inches from the stock location. Since the ignition is now right between the two seat mount frame extensions (those short pipe pieces welded to inside of the frame), the seat has plenty of room at that location with NO seat mods needed. I just slipped the stock ignition mounting rubber over the new "arrow head" and viola (no....I don't play one), it looked FACTORY STOCK! I even painted it blue to match!!!

This install was MUCH easier than mounting the module up at the headlight....and looks far better too.



:D :D :D
 
As they say "a picture paints a thousand words". I just ordered an Aux Tank. I hope this thread makes sense when I have (or supposed to have) all of the parts in front of me. I was told to relocate the ignition to underneath the main fuel tank with a cable tie - is this a viable option as I'm not a good fabricator. Rustie, there is nothing like adversity that makes you an experienced person in a particular field. I will be following this thread closely when installing my tank.

Cheers
Mark
 
Well, I went and spent the 2+ hours required to shoot these pics and then photoshop them, but the host site "tinypics", did exactly that....resized them tiny! If you need larger pics, I have some around 400k....and the originals are just over 3 megs each (HUGE!) So, if you need any further clarification, just PM me.

http://tinypic.com/2mg037

http://tinypic.com/2mg048

http://tinypic.com/2mg07n

http://tinypic.com/2mg088

http://tinypic.com/2mg092

http://tinypic.com/2mg09i

http://tinypic.com/2mg0ad
 
BTW guys,
The relocation of the vent to the upper rear of the aux tank increased my capacity to almost 1 full gallon. It was worth getting rid of that front petcock and replacing it with the ignition mounting bracket....kinda killed 2 birds with one stone.... :D :D :D
 
Do you fill the Aux tank first using its own cap with it's taps off or can you leaves the taps open and let it back fill from the main tank.

If I leave the Aux tank cap std and use your system of a higher vent hose T'd back up into the main tank vent, I'm assuming that the std aux tank cap doesn't leak any fuel. Is that right.

Cheers also for the photos Rustie.
 
Ya.....since the vent line at the rear of the aux tank is "Y'd" into the main tank cap vent, you NEVER need to remove anything....it fills automatically, and just about as fast as you can fill the main tank (you might have to wait 15 to 30 seconds max when filling to re-top off the main).

Also, I did use a true "Y" connection (5/16" ~ 8mm) at the tank cap and NOT a "T". It provides a much cleaner dual vent connection that can be nicely tucked between the frame and tank with only one line going up to the cap.

No, nothing leaks one drop...and I've left the main tank full for the last 2 months with everything remaining totally dry. :D :D :D
 
Finally I got my Aux tank (has been on back order for 2 months). I took a day off work to install as I need the tank urgently for this coming weekend. WHAT A F...ING PAIN IN THE ***. Even with Rustie's comprehensive method of installation, I still managed to use every swear word known to me. (Lucky the kids were at school). It took all day to source the parts (that supposed to be in the kit, but weren't), make the changes and instal the tank.
To all those people who have attempted to install this tank without advice from others - you deserve a medal. Personally Iwould have dropkicked the tank across the backyard.

Rustie, the only difference to your method was to notch the bracket to put a blanking bolt instead of a grub screw (couldn't find a grub screw with allen head) & instead of "Y" ing with main fuel tank breather, I used a one way valve breather and ran up & over triple clamps.

Thx Rustie for putting the pictures & details on the UHE site.


Cheers Mark
 

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