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Tsukayu Trunk



As we take more trips, of longer distance, gone more days at a time, I felt that I wanted to maximize storage and carrying capacity of the Valkyrie as much as possible. Even though I have a trailer (http://www.valkyrieguy.com/mctrailer.htm), I wanted an intermediate method of storage, more then just saddlebags, but less then the trailer. Pretty much something for day trips.

The key to this install was I wanted to easily take the trunk on and off the motorcycle. When I am just riding around town, I don't want the trunk on, only for trips. The first idea was to convert the hardbag mounts to "quick release", which would entail changing the bolts that hold the hitch and hardbags on to threaded rod. Hang everything off of that and they can easily be taken off by removing nuts that hold everything on. I had great difficulty finding metric threaded rod, of the right thread pitch, with the proper strength, so that idea went out the window after a few months of searching.

Then I looked further into how trunks are mounted on the Honda Valkyrie Interstate and discovered that the fender rails for Interstates have tabs on them where the trunk brackets are mounted. They were available through Honda and not too expensive so I ordered a pair. Once they got here I started the install.

**Your probably wondering why I didn't go with a factory Interstate trunk instead of the aftermarket one. Well, one, the OEM trunks with all the mounting hardware you need are $1200-$1500. Two, I already have the Tsukayu hardbags so the trunk will go better with those.





To change out the fender rails, the shocks have to be removed (at least the top mounting points). To accomplish that and more readily work on the motorcycle. I first mounted a Spoonland adaptor to be able to lift the bike up safely and securely. I use a Condor chock and then use bottle jacks and blocks under the engine guards to make the Valk absolutely solid. I then jacked up the bike which takes the weight off the shocks allowing for easy removal. While I had them off I changed the bushings on them.





The first and second picture above is the fender rail for the Standard Valkyrie; the third and fourth pictures are the fender rail for the Interstate with the tabs. You notice that the Interstate rails do not have the bracket for the backrest of the Standard. Because I wanted to take the trunk on and off, that would mean that I want to mount the backrest back on when the trunk is off. I needed that bracket on the tabbed Interstate rails... 


I found a person who fabricates many parts for drag bikes who was willing to cut and weld on chromed parts. He cut an area from the bracket for the tab to fit and welded it all together. I think it came pretty good. Minimal damage was done to the chrome.


The modified fender rails were mounted and the trunk's mounting bracket was bolted to the tabs. I bought and used chrome washers and acorn nuts. The trunks mounting brackets don't fit out of the box on to the tabs, they are too thick to fit between the tab studs and the top of the fender rail. The same person who modded the fender rails ground down the bottom of the mounting brackets and they fit on perfect.


The brackets were slid until the mounting points for the trunk itself were as level as possible (without more, major machining to the mounting brackets). The brackets are about 1/4" to 1/2" lower at the end as compared to the front. That is well within my specs as far as I'm concerned.



I covered the bottom of the trunk with painters tape to protect the paint and be able to mark mounting points. The trunk was placed on the mounting brackets. I had my wife sit on the passenger seat to line the trunk up correctly as to how she sits. The bag was then checked for square to the motorcycle and proper front to back placement. Also had to make sure that the trunk did not interfere with the lids opening on the hardbags.

While my wife held the trunk, I crawled underneath and traced the outline of the mounting brackets. The instructions say to measure from the edge of the traced bracket to determine where the holes should be drilled. I used a cut piece of thick coat hanger and some nail polish (the wife's) and pushed the hanger wire up through the mounting holes to mark on the tape the hole locations. Then I flipped it over, crossed my fingers, and drilled 8 holes.


The holes lined up perfect (almost) and it bolted up great. I added wider washers then the ones included to have more area where the bolts meet the fiberglass. The last picture is the best I can do from inside my small garage on a 20 degree day. I think it came out great and the trunk is a quality item. I realized after it was on that the taillight was now buried and anyone to the rear close to the bike will not see the brake light... have to fix that...



Found a 115 LED light (http://www.customdynamics.com/hd_tour_pak_led_lighting.htm) from Custom Dynamics. It was fastened to the trunk with 3M tape (use activator) and was flexible as to bend with the slight contour of the trunk. It stuck great. I drilled a very small hole behind it before mounting and put the wires (they are very thin) through into the trunk. To make it a tail-brake combination, you have to add a "dual circuit element" also from Custom Dynamics. Soldered the wires together. Drilled through the front (bottom of the trunk). Used a "2-flat" connector from the LED strip to wires into the Hoppy convertor input wires which were tapped using Posi-taps. Posi-taps are the best things going in that they make tapping into wires effortless and are VERY strong connections. The LEDs really light-up the back and there should be no problem in seeing me now. 




I think it came out really nice and looks like it is OEM. Can't wait for the first trip.


In the second picture above you can see how the backrest lines up with the rear seat. This is one advantage of mounting the trunk brackets on the tabs instead of the fender rail bolts. The backrest cushions now ride on top of the seat instead of behind it. I have seen trunks that have to be mounted way too far back because the cushion is behind the pillion.


Even with a tighter fit forward, the hardbags clear the trunk nice and leave room to get into them with the trunk there.


I was concerned that something rolling around the in trunk would catch the wires and break them; they are very thin, approximately 24ga. I found this "textured" heater-type hose. I split it lengthwise and tucked he wires up into it. The then used 1/2" conduit holders and riveted them to the trunk. Painted the rivet heads under the trunk black so you don't see them.

Tsukayu Trunk Addition


After riding with the trunk for about 3 months, I have discovered a few things. First, I don't have any reason to take it off, so I haven't taken it off yet! All the hardware and time to make it readily detachable and I probably won't take it off that much at all!

What I did notice was that with big trunk on the back, there was a vast expanse of black and with the LED brake light it kind of "needed" something else to tie the trunk to the Valk. I decided to add the factory VALKYRIE lettering to this aftermarket trunk. I think it looks really good on there and balances out the look of the trunk.


I definitely was not attempting to copy the OEM trunk, or make it look like I have one. Just simply trying to balance the look and show'em what I'm riding.








 Total Cost Of Trunk


Fender Rails


Rail Mods


Shock Bushings 30.00
LED Light Strip 120.00
Misc Hardware 50.00
VALKYRIE Letters 30.00