Refitting The Crankcase Halves - Derbi GP1 50 cc Workshop Manual

- Let the half-crankcase temperature settle with that of the
crankshaft.
- Reinstall the crankcase splitting plate WITHOUT installing
the crankshaft protection.
- During the reassembly process keep the centre thrust screw
loose.
- Tighten the four fixing screws and then loosen them with
the same angle (e.g. 90°)
- When the temperature has settled manually preload the
tool's thrusting screw until the ball bearing play disappears.
Specific tooling
020163y Crankcase splitting plate
R R
EFITTING THE CRANKCASE HALVES EFITTING THE CRANKCASE HALVES
- Prepare the mating plane by applying a thin layer of LOCTI-
TE 510, after cleaning the surface with and adequate solvent
(e.g. acetylene trichloride).
- Heat the flywheel-side half-crankcase using a heat gun.
Recommended products
Loct'rte 510 Packing fluid
Packing
- Keeping the transmission-side half-crankcase in horizontal
position, vigorously and accurately insert the flywheel-side
half-crankcase.
- Insert at least 3 fixing screws and tighten them quickly.
- Insert the other 5 screws and tighten them at the prescribed
torque.
Locking torques (N*m)
Crankcase fixing screws 11-13
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