it has a cam chain
According to a Mazda dealer in Chingford it is at 54000 miles or after six years.
they have a ribbed timing belt
The 1.8 L has a belt that must be replaced every 60,000 miles.
No, since there are no valves, there was no need for a cam shaft or belt. Or, all the parts that go with it. No header mechanism required.
Cambelt.
cambelt
cambelt
Allow 2 hours which includes removal and refitting cambelt. Best to renew cambelt at the same time so budget for belts and followers.
cambelt
cambelt
Toothed rubber Cambelt