I went through this years ago. The diff that I had was that the sprocket hubs are different between the 85 and 86. The sprockets mount on different sides of the hub. To fix this, you just order the hub that is needed from Dura blue. Slip it on and go. No need to change carriers or brake setups. The DB hubs will fit the standard heavy duty axles as well as factory axles. Not sure on the others!
Signature:
1985 ATC350X
1986 TRX-250R(Soon to be an 87)
2001 Polaris Scrambler 90
2004 Arctic Cat DVX400
2003 Yamaha Blaster
2005 YFZ450
Rip: To many to list........