The modiefied Sprocket Carrier,and Rear Brake Caliper Bracket is done on an EXCHANGE basis. You have two choices
1) Pay a Deposit of £30 which is refunded on their return.
2) If you wish you can select to keep your FJ parts and a £50 is charged to purchase these parts.
A very good mod is to fit a modern 17" wheel to replace the FJ 80's 16" item *. The most common choice is the Yamaha FZR1000 ExUp from 89. Being a Yamaha wheel it has common items that share with the FJ, this being the rear disc fits straight one and so does the Sprocket carrier, plus they both use a 20mm wheel spindle.
This kit contains the following;
Modified Rear Sprocket Carrier. inc s/s bolts
New Rear Sprocket (please select size)
New rear wheel bearing in carrier.
Two spacers for the sprocket side and the brake torque arm side.