FS: FM lightweight flywheel, 10.3lbs
 

This, in 10.3lb format: Flyin' Miata : Engine/Drivetrain : Transmission : 1990-05 FM lightweight flywheel

Disclosure: Was in the car ~30k (kms), zero issues with it. Had oil leaks (and noob install tactics) that destroyed the FM clutch post-1.8 swap, and due to time had to swap in an OEM flywheel during the clutch job.

More info and pics here: Where you help me post-mortem an FM clutch (pics!) - MX-5 Miata Forum

This will need machining, but otherwise is in great shape. I've left the pilot bearing in place to preserve mating surfaces.

Located near Toronto, ON. Priced at $200CAD + shipping.