YAMAHA XS 400 1977-1982 - service_manual Oct 27, 2014YAMAHA XS 400 1977-1982 - service_manual 1. Yamaha X3360-400 General specifications XSSMI xsmun xsamz xs4no xsooar/ zr XS400G/ SC, H Engine Type Displacement (co/ cu) Bore x Stroke (mm/ in. ) Compression ratio Starting system Ignition syatam Lubrication system Carburetion Transmission Clutch type No. speeds Primary reduction Secondary reduction Gear ratios 1981 Yamaha XS 400 wiring diagram - Fixya 1981 Yamaha XS 400 wiring diagram. Does anyone have a wiring diagram for a 1981 Yamaha XS 400 Special motorcycle? the wire on my cycle was cut all over the place and destroyed. Clicking this will make more experts see the question and we will remind you when it gets answered.