How much does it cost to replace the clutch on a 1992 mazda Rx7

a good shade tree mechanic can have it in four hours with machine shop service on the flywheel and inspection of the hydraulics~ rate? depends on a lot of factors~

For the clutch install - Approx. $450 labor and $140 parts. So, about $600. Check out this RX7club.com site for more of their member's input...Thankfully, I'm not close to replacing the one on my MX-5 yet (with only 8k miles, I better NOT be!): http://www.rx7club.com/1st-gen-non-technical-207/labor-cost-clutch-install-776773/

If you have a few wrenches and a floor jack w jack stands this can be done in a few hours easily. if you DIY you are looking at a more manageable cost but i would contact your local repair shops