1985 Mazda RX7 clutch

The clutch is operated by clutch master cyclinder on the firewall next to the brake master cyclinder. Check the fluid level. The is a clutch slave cyclinder on the transmission bellhouser on the driver's side. You need to have someone press the clutch pedal down while you are watching the slave cyclinder to see if the arm moves back and forth when you press the clutch down and release it. They should move back and forth. If it dosen't you need to replace the clutch master cyclinder and/or slave cyclinder on the transmission bell housing. If both the master and slave cyclinders are working properly it may be time to replace clutch disc, pressure plate, and throwout bearing.

Great answer! :-)