COMPLETE KIT REAR DISC BRAKE FOR YAMAHA FZ16
It is little bit complex task which requires skill and experience. Major tear-down of the wheel will be needed and you will need to disassemble tire, valve stem, wheel weights, ring gear, and drum brake assembly. We advise you to take your bike to your local service center / workshop or some experienced mechanic as they will do this task for you more precisely.
Make sure you install it correctly and straight, to make everything working properly and durable. A little mistake will make everything gone wrong.