Engine

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Models 648R

Make..............Kawasaki

Engine Model Number..............FX691V

Displacement..............726 cm³ (44.3 cu in.)

Cylinders..............Two

Bore..............78 mm (3.07 in.)

Stroke..............76 mm (3.0 in.)

Compression Ratio..............8.2:1

Speed, Fast Idle (No Load)..............3650 ± 100 rpm

Speed, Low Idle..............1800 ± 150 rpm

Operating Range..............1650-3750 rpm

Valving..............OHV

Oil Filter..............Cartridge Type Full Flow

Cooling Type..............Air

Air Cleaner (Canister)..............Dry Type with Unloader Valve

Spark Plug Gap..............0.75 mm (0.030 in.)

Spark Plug Torque..............22 N•m (16 lb.-ft.)

Valve Clearance (Intake and Exhaust)..............0.05-0.10 mm (0.002-0.004 in.)

Models 652R, 652R MOD and 661R

Make..............Kawasaki

Engine Model Number..............FX730V

Displacement..............726 cm³ (44.3 cu in.)

Cylinders..............Two

Bore..............78 mm (3.07 in.)

Stroke..............76 mm (3.0 in.)

Compression Ratio..............8.2:1

Speed, Fast Idle (No Load)..............3650 ± 100 rpm

Speed, Low Idle..............1800 ± 150 rpm

Operating Range..............1650-3750 rpm

Valving..............OHV

Oil Filter..............Cartridge Type Full Flow

Cooling Type..............Air

Air Cleaner (Canister)..............Dry Type with Unloader Valve

Spark Plug Gap..............0.75 mm (0.030 in.)

Spark Plug Torque..............22 N•m (16 lb.-ft.)

Valve Clearance (Intake and Exhaust)..............0.05-0.10 mm (0.002-0.004 in.)

Models 652R EFI, 652R EFI MOD and 661R EFI

Make..............Kohler

Engine Model Number..............ECV740 EFI

Displacement..............747 cm³ (45.6 cu in.)

Cylinders..............Two

Bore..............83 mm (3.27 in.)

Stroke..............69 mm (2.72 in.)

Compression Ratio..............9.1:1

Speed, Fast Idle (No Load)..............3650 ± 100 rpm

Speed, Low Idle..............1800 ± 150 rpm

Operating Range..............1650-3750 rpm

Valving..............OHV

Oil Filter..............Cartridge Type Full Flow

Cooling Type..............Air

Air Cleaner (Canister)..............Dry Type with Unloader Valve

Spark Plug Gap..............0.75 mm (0.030 in.)

Spark Plug Torque..............27 N•m (20 lb.-ft.)

Valve Clearance (Intake)..............0.04-0.78 mm (0.0016-0.0031 in.)

Valve Clearance (Exhaust)..............0.05-0.09 mm (0.002-0.0035 in.)