NB: These instructions are given for guidance only and cannot engage the author's liability in the event of misinterpretation, failure to assess the vehicle's actual condition and/or non-conformity, unsuitable mechanical practice or the use of inappropriate tools.
Cylinder-head installation and torque — Laverda 1000 and 1200.
Fitting the head gasket
- Fit the gasket gently and level onto all the studs, without forcing it to one side.
- Lay it perfectly flat on the cylinder block, with the O-rings correctly seated so they cannot slip over or under the gasket when tightening.
- The O-ring holes are deliberately slightly offset from the studs (more material around the copper rings); this does not affect head oil feed.
- On 1000s with the small shoulder at the top of the liners, clean the shoulders perfectly (carbon, residue) and check the copper rings are correctly seated on top of the block.
Very important: the top of the liners sits originally about 0.1 mm below the block's gasket face. It must be at most flush, never above. If it protrudes (after changing or repositioning the liners), the head gasket will inevitably leak. Check this point without fail before reassembly.
Torque and tightening sequence
The various manuals sometimes give wrong values/sequences, risking head distortion or pulling the stud threads out of the cases. Recommended torques:
- M9 nuts: 32 Nm
- M8 nuts: 20 Nm
- M7 nuts (side, front and rear) : 18 Nm
Sequence (after checking the studs are clean and sound): the classic spiral/crosswise pattern for the M9 nuts, which alone affect head clamping (the M8 nuts only clamp the camshaft bearings). Do not follow the RMT, which wrongly includes the bearing nuts in the sequence.
- 1st pass at 18 Nm, spiral and crosswise, for the M9 then the M8 nuts.
- 2nd pass at 32 Nm for the M9, then 20 Nm for the M8.
- Finish with the M7 nuts (side, front and rear) at 18 Nm.
- Re-torque the head after 300-500 km (slacken each nut half a turn, then re-torque).