Can cam gears be noisy?

[Mart]

Has anyone experienced noisy cam gears? Steel crank gear/Aluminium cam gear, 59A style, thrusting towards the block.

Fresh build.

I have a noise like a whirring noise. It isn't the generator or water pumps as it is the same with the belt off. Has anyone experienced noisy cam gears?

I can't think of anything that would make a whirring noise. Probing around the motor with a listening stick has so far failed to pinpoint the source.

Any ideas?

Mart.