MP3 400

Source: Piaggio service manual

Weights and Dimensions
Kerb weight: 253 ± 5 kg (557 ± 11 lbs.)
Maximum weight allowed: 445 kg (981 lbs.)
Maximum height: 1,225 mm (48.23 in.)
Width: 745 mm (29.3 in.)
Wheelbase: 1,550 mm (61 in.)
Length: 2,180 mm (85.8 in.)
Track 420 mm (16.5 in.)

Type: Single-cylinder, 4-stroke
Cubic capacity: 399 cm³ (24.35 in.³)
Bore x stroke: 85.8 x 69 mm (3.38 in. x 2.71 in.)
Compression ratio: 10.6 ± 0.5 : 1
Engine idle speed: 1,500 ± 100 rpm
Timing system: four valves, single overhead camshaft, chain driven.
Valve clearance
Inlet: 0.15 mm (0.006 in.)
Outlet: 0.15 mm (0.006 in.)
Max power: 24 kW at 7,250 rpm
Max torque: 38 Nm at 5,250 rpm
Lubrication: engine lubrication with trochoidal pump (inside the crankcase), oil filter and pressure adjustment bypass
Lubrication pressure: 3.5-4 bar (51-58 psi)
Minimum lubrication pressure @ 100° C (212° F): 0.8 bar (11.6 psi)
Fuel supply: electronic injection with Ø38-mm throttle body and electric fuel pump
Cooling: forced coolant circulation system
Fuel: unleaded petrol, 95 RON (~93 octane)

Transmission: automatic expandable pulley variator with torque server, V belt, automatic clutch
Final reduction: gear reduction unit in oil bath

Engine oil: 1.7 l
Transmission oil: 250 cm³ (1 US cup)
Cooling system fluid: ~ 1.8 l (1.9 US qt.)
Fuel tank, main / reserve): ~12 l / ~2 l (3.17 US gal. / 0.53 US gal.)

Electrical System
Start-up: electric
Ignition: electronic, inductive, high efficiency ignition, integrated with the injection system, with variable advance and separate HV coil
Ignition advance: three-dimensional map managed by control unit
Spark plug: Champion RG6YC, NGK CR7EKB [1]
Battery: 12 V / 14 Ah, sealed lead acid
Generator: alternating current

[1] Also see Common Service Parts

Frame and Suspension
Chassis: tubular and sheet steel
Front suspension: The tilt mechanism is composed of an articulated parallelogram suspension with die-cast aluminium control arms and two side headstocks plus shock absorbers with hydraulic locking system.
Front suspension travel: 85 mm (3.35 in.)
Rear suspension: two double-acting shock absorbers, adjustable to four positions at preloading
Rear suspension travel: 110 mm (4.33 in.)

Front brake: 240 mm (9.45 in.) double disk with hydraulic activated by the handlebar right-hand
Rear brake: disc brake, diameter 240 mm (9.45 in.), with hydraulic operated from the handlebar with the left lever

Wheels and Tyres
Wheel rim type: light alloy rims
Front rim: 12" x 3.00
Rear rim 14" x 4.50
Front tyre: tubeless 120/70-12" 51S or
Rear tyre: tubeless 140/70-14" 68S or 68P
Front tyre pressure, rider / with passenger: 1.6 bar / 1.8 bar (23 psi / 26 psi)
Rear tyre pressure, rider / with passenger: 2.4 bar / 2.6 bar (35 psi / 38 psi)
Last Updated Sat, 31 Aug 2019 18:46:49 +0000

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