The Yamaha FZ series motorcycles, including the FZS V3, do not use a timing belt. Instead, they utilize a timing chain for the engine's camshaft and crankshaft synchronization. The timing chain is a durable component designed to last for a long time and does not require regular replacement like a timing belt.
If you are experiencing issues with the timing chain or need to inspect it for maintenance purposes, it is recommended to consult the service manual or seek assistance from a qualified mechanic who has experience with Yamaha motorcycles. They will have the necessary tools and expertise to properly inspect and, if required, replace the timing chain on your Yamaha FZ bike.