PIAGGIO MSS X9 EVOLUTION 250 Workshop Manual page 196

Cooling system
Centre the cover until it permits insertion of the pin
and then eject the seal ring and the two ball bear-
ings.
Specific tooling
020628Y Water pump service kit
Before you reassemble, wash all the components
and continue with the following checks.
Flywheel cover: Check that there are no cracks or
oxidation on the seat of the ceramic seal. Check
the capacity loads of the bearings and of the seal
ring. Check the efficiency of the drain hole.
COOL SYS - 196
MSS X9 Evolution 250