Well the 86 trx motors and the 85 atc motors are the same thing. Year of the engine. Honda is no help. The serial number for the engine. I have the serial.
'85 ATC350X - 'Showgirl' '86 OEM plastics/Fork boots, Rear Axle/Rotor/Hubs, Hondaline Fender stabalizer/extender, Speedo/Tach, Tank cover. '86 ATC350X - 'Go-Go Girl' '82 ATC250R - 'California Girl' - Progressive springs F and R, Hondaline HL Guard, Fairing and Speedometer. '82 ATC250R -'Snow Bunny' Ice Racer, Very Clean, Hondaline Fairing, custom FT tire, will put in the 300R motor '70 US90 'Ol'Girl' - Aquarius Blue. All original seat and tires. Yakuza black panther psp download english patched. Resto project in the future '85 ATC250ES-'Workin' Girl' CMP Footguard, Hondaline Mudflaps, Speedo, HL Lens, Block Heater, Work Light, Foot Peg Covers and Cooler Rack '85 ATC70 - All Original '84 Yamaha 225DX - Durablue +3' axle, DR motor, New Plastics, Foot, Hand and HL Guards. '85 Yamahauler - Gun Rack & 'Nerf Bars' '85 Yamahauler - Nearly together and restored '83 Suzuki ALT125 - Pieces '89 Suzuki LT-4WD - Token Golf Cart.