Looks like she is coming along, and will be a nice ride when finished. The headlights are monitored by the voltage regulator, located near the rear of the frame, the regulator is square, and has air fins for cooling. These are common to go bad, and when they do, the headlights will blow. The part should be fairly cheap, I replaced one on my tri z with one from a banshee, looked the same, and cost about 10 dollars off ebay. As for the decompression cable, I cant help you on that one, I havent messed with the one on my 350x yet, Ive had it for a few months, and rode it several times, but my motor will be coming out shortly for a rebuild (it smokes). Good luck, and hope to see more pics along the way!
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes