Lightened & Re-surfaced 1.8L OEM flywheel
 

Professionally re-surfaced and lightened (ring on crank side of flywheel has been ground almost flat) NA8 flywheel. I believe most NA8 flywheels weigh 18-19 pounds. On my digital luggage scale, this flywheel is 14.9lbs. $65 plus shipping or local pickup.
https://cimg1.ibsrv.net/gimg/www.mia...9bf962d978.png
Re-surfaced clutch side
https://cimg2.ibsrv.net/gimg/www.mia...41364b4d1f.png
Angle view perspective of crankshaft side showing ground down "ring"
https://cimg3.ibsrv.net/gimg/www.mia...fe6c01f109.png
Top view of crankside showing Mazda part numbers