1982 yamaha yz125 head torque specs?

10mm nuts are 40 foot pounds. 8mm nuts are 18 foot pounds. You need to torque all the nuts to 10 foot pounds to start, then torque the 10mm nuts to 20 foot pounds, then 30 foot pounds, and then 40 foot pounds. Retorque all the 10 mm nuts to 40 foot pounds and then retorque the 8mm nuts to 18 foot pounds. Torque the bolts in a criss-cross pattern.

I always pull them to 70 foot pounds in a criss cross pattern. Start the engine up and allow it to warm up. When cool, retorque the heads in the same manner. I only use Fire Ring head gaskets.

Good luck
Steve

Hello vienotkelly: The correct Main bolt torque is 42 foot pounds. The connecting rods torque to 29 foot pounds. The torque sequence for the head bolts and the correct way to tighten the bolts are attached to this reply. Thak You for using FixYa. Roger

Head Bolt Torque For your 1994 Oldsmobile Cutlass Supreme (3.4L SFI DOHC): Foot pounds (Final torque) Note: Torque sequence --------- | 6 2 3 7 | | 5 1 4 8 | --------- Step 1: torque in sequence to 33 Ft/Lbs Step 2: turn an additional 90 degrees Recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) thatpermanently stretch during the initial installation.New head bolts must be used when cylinder head isreplaced or re-installed to obtain proper torque. Foot pounds (Final torque) Note: Torque sequence --------- | 8 4 1 5 | | 7 3 2 6 | front --------- of engine | 6 2 3 7 | | 5 1 4 8 | Step 1: torque to 40 Ft/Lbs --------- Step 2: turn an additional 90 degrees Recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) thatpermanently stretch during the initial installation.New head bolts must be used when cylinder head isreplaced or re-installed to obtain proper torque.