Both are great machines worthy of ownership!!
They being said there were some improvements to the 87.
Better designed rear brake and differential to make them more water tight. Improved carb design for better cold starts. Design change to starter reduction gears to improve durability. Updated stator for better durability and higher wattage also(??).
I think I covered the main items..but someone will remind me if not.
Yes the seats were grey..86 model also.
Current toys..
1986 Honda 350X..trail bomb!
1985 Honda 250SX..my main mudder
1985 Honda 250ES..Back in Black Trike
Current non-trike toys:
1990 Honda TRX300FW
1995 Seadoo GTX
1998 Polaris Indy Lite 340(Nearly new looking)
1998 Polaris Touring 500
1998 Club Car (electric)