Main Motorcycle: 1996 900 Trophy BRG
Join Date: Mar 2008
Location: Apple Valley, California
Other Motorcycle: 1998 Sprint Sport
Hi Claus, The problem with converting a Trophy is there is a lot of stuff buried under the front fairing. The big items under there are the ECU, fuse box, and two big harnesses. So if you take off the front fairing, where will you put this stuff and keep it out of the weather. The Sprint, Daytona, and earlier one headlight Trophy put the ECU and fuse box under the seat. The main wiring harness from these three models are mostly the same and would be needed for the conversion. However there will still be many smaller wiring harnesses to hide and put away. This is why a big headlight shell is needed. It was a tight fit but all the smaller harnesses went in there.
Back to your original question about gauges that will fit onto the existing wiring. Sadly the answer is no. The twin headlight Trophy has a unique wiring harness that only went on that twin headlight model. The gauges for the Trident, 900 Thunderbirds, Legend, and one headlight Trophys are weather protected, but they won't plug into your existing harness. These weather protected gauges will plug into the Sprint, Daytona, and early Trophy.
My guess on your current problem of too much heat is because of those missing shields. Used cam cover shields can be found on Ebay, but the foam shield degrades over time so a used one is not likely.