PIAGGIO MP3 400 hpe E5 2021 - Water Pump

Inspecting the by-pass valve
- Check the unloaded spring length.
- Check that the small piston is not scored.
- Ensure that it slides freely on the crankcase and
that it guarantees a good seal.
- If not, eliminate any impurities or replace defec-
tive parts.
Characteristic
Standard length
52.4 mm
Piston standard diameter
12.861 + 12.843 mm
Water pump
Removal
- Before removing the flywheel cover, loosen the
impeller.
CAUTION
THE THREAD IS ANTICLOCKWISE.
CAUTION
IF THE LOCKING TORQUE IS EXCESSIVE, DO NOT INSIST
WITH THE OPERATION BUT CARRY IT OUT AFTER THE
REMOVAL OF THE FLYWHEEL COVER. AFTER REMOV-
ING THE FLYWHEEL COVER, LOCK THE IMPELLER
(DRIVE SIDE OF MOTORCYCLE) IN THE CLAMP AND,
ACTING FROM THE OPPOSITE SIDE, LOOSEN THE IM-
PELLER SHAFT (LEFT-HAND THREAD).
- Keeping the cover locked in a vice, unscrew the
impeller shaft drive. During removal, support the
flywheel crankcase. Remove the drive and the
shim washer underneath.
CAUTION
THE THREAD IS ANTICLOCKWISE.
Engine MP3 400 hpe E5
ENG - 120