head torque advice

[kiwi cowboy]

well im about to put my bike back together [fz750] and am after some advice.
the head is in 2 pieces [the head and then the cam case] the manual gives the head torques ok but should i have to retorque it after its been hot or not have to? the manual doesnt say to but iduno.
any opinions?

[Pancakes]

Depends on the gasket. If your using a modern Monotorque type one you can check it if you like but should be fine. I think these may have been made cos no-one wants to take there vehicle back to a shop two days after they picked it up or something? That and the extra work to get back in there etc. The final thickness and final torque should be the same cos it affects the engine once the temperature is up to normal and flex is involved etc but the gasket material itself will determine just how it squishes over time.

[kiwi cowboy]

Depends on the gasket. If your using a modern Monotorque type one you can check it if you like but should be fine. I think these may have been made cos no-one wants to take there vehicle back to a shop two days after they picked it up or something? That and the extra work to get back in there etc. The final thickness and final torque should be the same cos it affects the engine once the temperature is up to normal and flex is involved etc but the gasket material itself will determine just how it squishes over time.

the new gasket is a genuine yamaha gasket but dosent say anything about being a monoturque.

[Pancakes]

You need to find the torque setting, someone here will know or Google/call some shops? And failing getting your hands on any info other than that torque it up in stages, ie, 50% of total, 80% than 100%. Too much pressure is as bad as too little so don't just go crazy. The way the bolts and block/head expand under heat and load is a sensitive thing. You might get lucky but the info will be out there. For your bike it's gonna be maybe 27-28Nm but you need to find the number. There is a gasket place in Rosebank Rd area that might be helpful?

There should be a pattern to torque it up in. Talk to a mechanic to get an idea for your bike.

[pete376403]

haynes manual give a torque of 37Nm (27 ft-lbs) for 87 and 88 engines, 41 Nm (30ft-lbs) for 89 on. They note that the threads should be lubricated with engine oil. Tightening sequence is shown in the sketch .
There's nothing in the manual about retorquing later, and I'm sure as hell that never happens with a new bike.

[Pancakes]

Hahaha I meant ft/lb too! Even converted it from kg/m to ft/lb so it was in more common langauge. Shoulda checked my post a. Not a bad guess.

[kiwi cowboy]

haynes manual give a torque of 37Nm (27 ft-lbs) for 87 and 88 engines, 41 Nm (30ft-lbs) for 89 on. They note that the threads should be lubricated with engine oil. Tightening sequence is shown in the sketch .
There's nothing in the manual about retorquing later, and I'm sure as hell that never happens with a new bike.

27ft-lb is wot the manual says and have the sequence thanks[have the clymer manual]
hows the top end of your motor looking pete?