APRILIA SHIVER 900 User Manual

Check the valve eccentricity:
valve stem (3) maximum eccentricity allowed:
0.05 mm (0.00197 in)
valve head (4) maximum eccentricity allowed:
0.05 mm (0.00197 in)
Check that the fixing grooves (5) of the valve cot-
ters are in proper conditions.
VALVE SPRINGS
Carry out a measurement and a visual inspection
of the valve springs for damage, distortion or loss
of tension.
Measure the spring length at release position.
Valve springs: minimum wear limit (6) 42.5 mm
(1.673 in).
Valve springs: minimum wear limit (7) 38 mm
(1.496 in).
Checking the cylinder head
•
Using a round scraper, clean off any carbon deposits in the combustion chamber.
CAUTION
DO NOT USE A POINTED INSTRUMENT TO AVOID DAMAGING OR SCRATCHING THE SPARK
PLUG THREADS OR THE VALVE SEATS.
•
Check the head for damage or scratches and replace it if necessary.
•
Check there are no mineral deposits or rust in the head water cooled jacket; clean off if
required.
•
Use a checking ruler and a thickness gauge positioned diagonally to the ruler to measure
the cylinder head distortion.
Maximum cylinder head distortion: 0.03 mm (0.0012 in)
•
Check that the tappet covers and the camshaft toothed wheel cover are not damaged or
worn; replace the defective part(s).
Installing the overhead camshaft
The camshaft refitting procedure is described in the "Timing" section.
See also
Timing
Engine SHIVER 900
ENG - 242

APRILIA SHIVER 900 Specifications

General

Displacement	896.1 cc
Transmission	6-speed
Rear Brakes	240 mm disc, single-piston caliper
Engine Type	V-Twin, 4-stroke
Power	70 kW (95.2 hp) @ 8, 750 rpm
Torque	90 Nm at 6, 500 rpm
Fuel System	Electronic fuel injection
Front Suspension	Inverted fork with adjustable preload and rebound damping
Rear Suspension	Aluminum swingarm with adjustable rebound and preload
Front Brakes	Dual 320 mm discs, radial 4-piston calipers
ABS	Standard
Traction Control	Adjustable traction control
Ride Modes	Sport, Touring, Rain
Seat Height	810 mm
Wheelbase	1, 460 mm
Fuel Capacity	15 liters
Dry Weight	199 kg (439 lbs)