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| The undertray The Katana subframe needed to be modified because I'm using a GSX1100ET rear light unit, and I wanted to fit the electrics below the seat to keep the bike un-cluttered. I also want lots of easily-accessible space for the electrics because the Katana will be a test-bed for all kinds of electrickery. |
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| This is how Yoshimura did it on the 1135R |  |
I will combine the undertray that supports the ET rear light, a tray for the electrics and a container for the battery all-in-one The tray will have an aluminum double-floor for my future experiments with electrickery so I won't have to drill into the tray itself everytime I change something |
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| A 30mm deep recess to give the tyre some extra clearance |  |
The tray is perfectly aligned with the subframe, the underside completely flat. The battery-box is sized to take a 9Ah gel battery (149x85mm) and 80mm deep. |
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Version 2. |
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| More room for the rear tyre and the edges extended along
the sides of the saddle. The rear borywork will be extended all the way up to the shock mount. |
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| The base plate has been cut out of 3mm aluminum. |  |
| The gap for the rear tyre cut out. |  |
| These are the three main parts of the tray. |  |
| Folding the standing edge. |  |
| Tinie tack-welding everything together. |  |
| The basic shape is here. |  |
| Threaded spacers to be welded into the tray |  |
| The replaceable electronics tray that also holds the battery in place. |  |
| Clamping the undertray in the milling machine... |  |
| ...for a recess for one of the bolts that hold the seat unit. |  |
| The seat unit lines up perfectly! |  |
| On the other side also. |  |
| The spacers for the electrics thay welded in. |  |
| The mounting plate for the seat lock has been modified to take an ET/EX lock. |  |
| The tray is fitted with two rivet-nuts at the front and threaded caps in the frame tubes at the rear. |  |
We've fabricated and welded "side-skirts" on both sides so the seat unit extends along the bottom of the seat. The strips were bent first and than bashed with a hammer to match the curve of the seat, |
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| Haven't decided on the colour yet but it now looks properly finished. |  |
| Another look at some details... |  |
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