How do you set timing on 2003 660 Yamaha raptor 660?

To set the timing on a 2003 Yamaha Raptor 660, first, remove the timing cover and ensure the engine is at top dead center (TDC) on the compression stroke. Align the timing marks on the crankshaft and camshaft; the mark on the camshaft should align with the mark on the cylinder head. Once aligned, check the tension on the timing chain and adjust if necessary. Finally, reassemble the timing cover, ensuring all components are secured properly.