I think MR ATC said there were 80+ differences.... here's some more that hrc200x didn't already have. Some of those you listed I didn't know like kickstart gear ratio, and handle bars. I have a Dirt Wheels article on the 86 that lists some more... I'll edit my post if I can find the mag.
All hrc200x stated earlier AND some more differences......
Fork boots (86 has like 2x's the ribs... for your riding pleasure...hahaa)
stickers on tank, rear mudflap, warning stickers, etc...
helmet holder on 86
front hubs have different 'lock' for the different rim
front brake rotor (85 circles - 86 spiral) possible back one different too.
oil intake (86 improvement when on off cambers, wheelies)
steering stop 'guard' on 86 triple tree
top of 86 triple tree is black
tank flares on 86 are 'cut back' to reduce catching on front forks
toolbox end cap (flat like most on 86 cause of new bearing carrier...85 box has a 'nose' on it to hold the spanner wrench.)
toolbox mounting brackets
rubber mounting around rear shock canister
headlight/kill switch
86 frames frames have added strengthening... (later 86's have even more)
frame where exhaust mounts by grabbar.. one has a 't' to hold the exhaust and the other doesn't. (MR ATC told me I forget which model was which.)
Bruce
'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. 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