No.
Timing chain NO belt.
A 2003 sportster has a chain drive for the promary, firm the engine to the transmission, and a belt drive final drive. The final drive is from the transmission to the rear wheel.
timing chain timing chain
timing chain timing chain
It has a timing chain
timing CHAIN(s)
Chain
It has a chain ...
timing chain
The V6 has a timing CHAIN
chain
timing chain