these engines have torque to yeald head bolts. there is a process outlined in the repair manuel telling the steps to properly tighten them but there is no total torque number. they should be replaced and should not be reused
The 2005 Yamaha cylinder bolt torque specifications are 90 pounds per square inch. The cylinder bolts should be torqued at 30 pound intervals.
a torqe wrench
torque for 2c engine cylinder head bolts
torque setting for cylinder head bolts for a skoda felicia
The torque specs for a Toyota Camry cylinder head is 60 pounds for the inside bolts and 50 pounds for the site bolts. The cylinder head bolts should be tight from and to end alternating.
1974 yamaha dt 125
18 ft/lbs for the nuts 11 ft/lbs for the bolts http://www.zenitram-inc.com/Manuals/PhazerCrank.jpg
torque settings for cylinder head bolts
Torque for 50 hp fore stroke casing bolts
For a 2002 Yamaha YZ85, the torque settings for the cylinder head bolts are typically around 18-20 ft-lbs (24-27 Nm). The torque for the cylinder barrel bolts is generally around 12-15 ft-lbs (16-20 Nm). Always refer to the service manual for the most accurate specifications and ensure proper torque sequence when tightening.
tighten the 12mm bolts in a criss cross pattern to 8ft lbs then retighten to 17ft lbs
For the Yamaha 225DX, the torque specifications for the cylinder head bolts are typically around 40-45 ft-lbs (54-61 Nm). It’s important to follow the proper sequence when tightening, usually starting from the center and moving outward in a crisscross pattern. Always refer to the specific service manual for your model year to confirm the exact specs and torque sequence.