KZ650 Technical Specifications

Engine

Engine:	DOHC, Inline 4, Air Cooled
Displacement:	652 CC
Valves:	8 Valve (4 Intake / 4 Exhaust) Shim Under-Bucket
Valve Clearance, Cold:	0.08 - 0.18mm (0.003 - 0.007in)
Valve Timing:	Inlet: Open: 22° BTDC Closed: 52° ABDC Duration: 250$deg; Outlet: Open: 60° BBCD Closed: 20° ATDC Duration: 260°
Bore and Stroke:	62 X 54mm (2.44 X 2.13in)
Compression Ratio:	9.5:1
Compression Pressure:	10-14 kg/cm² (155-185 PSI)
Max Horsepower:	64 @ 8,500 RPM
Max Torque:	5.8kg (41.9 ft-lbs) @ 7,000 RPM
Cam Chain Type:	Single Roller or Hy/Vo depending on Model
Lubrication:	Forced, Twin Rotor Oil Pump
Oil Type:	SAE 10W40 (Recommended)
Oil Capacity:	Approx. 3.8L
Cylinder Numbering:	Left to Right 1-2-3-4
Firing Order:	1-2-4-3
Idle Speed:	900 - 1,050 RPM

Fuel System

Carburetors:	4 x Mikuni VM24SS
Float Level in Bowl:	29-31mm
Main Jet Size:	102.5
Pilot Jet Size:	15
Fuel Capacity:	16.8L (4.4 US Gallons)
Fuel:	Non-leaded Gasoline
Fuel Consumption:	Approx. 45 MPG Average
Throttle Cable Play:	2-3mm

Drive Train / Transmission

Clutch Type:	Wet, Multi-plate
Recommended Clutch Plate Thickness:	3.7 - 3.9mm
Clutch Cable Play:	2-3mm
Gear Box:	5 Speed Constant Mesh (Manual), Return Shift
Gear Ratios:	1st - 2.33 2nd - 1.63 3rd - 1.27 4th - 1.04 5th - 0.89
Primary Reduction Ratio:	2.55
Final Reduction Ratio:	2.56
Overall Drive Ratio:	5.81 @ Top Gear
Primary and Final Drive Type:	Chain / Chain
Drive Chain Length:	102 Links
Recommended Chain Tension:	20-30mm
Shift Pattern:	1-N-2-3-4-5

Ignition System

Starter Type:	Electric, Kick (Kick was eliminated on later models)
Ignition Type:	Battery, Coil
Pickup Type:	Points, Electronic (Points were changed in favor of Electronic on later models)
Spark Plugs:	4 x NGK B7ES, ND W22ES-U or Champion N4
Spark Plug Gap:	0.7 - 0.8mm (0.028 - 0-031in)
Ignition Timing:	10° BTDC @ 1,500 RPM 35° BTDC @ 3,200 RPM
Breaker Point Gap:	0.3 - 0.4mm (0.012 - 0.016in) on models so equipped

Electrics

Battery:	Yusa YB10L (12V 10AH)
Continuous Charge Rate:	1.0A
Headlight:	12V 50/35W
Tail / Brake Light:	12V 8/27W
Turn Signal Lights:	12V 23W
Meter Lights:	12V 3.4W
Neutral Indicator Light:	12V 3.4W
Turn Signal Indicator Lights:	12V 3.4W
High Beam Indicator Light:	12V 3.4W
Oil Pressure Warning Light:	12V 3.4W
Brake Light Failure Indicator Light:	12V 3.4W
Horn:	12V 2.5A
Fuses:	20A (Main) 10A (Head) 10A (Tail)
Alternator:	Nippon Denso 0037000-1340
Regulator / Rectifier:	Shindengen SH221-12
Ignition Coils:	Toyo Denso IGC088K-0000 / IGC089K-0000
Starter Motor:	Mitsuba SM224-D

Frame & Suspension

Frame:	Tubular Steel, Double Cradle
Front Suspension:	Telescopic Forks
Fork Oil Type:	10W40 or 15W Fork Oil
Fork Oil Capacity:	165cc Each Leg (5.6 oz)
Rear Suspension:	Swing Arm, Adjustable Twin Shock
Steering Geometry:	63° Rake / 4.25 in trail
Steering Head Angle:	39.5°
Minimum Turning Radius:	2.4m (94.5 in)
Brake Fluid Type:	DOT3, DOT4, DOT5
Front Brake Type:	245mm Disc
Minimum Brake Disc Thickness:	6mm
Rear Brake Type:	180 x 40mm Drum (Dual Shoe), 245mm Disc (Discs were used on some later models)
Braking Distance:	12m from 50 kph (29.4 ft @ 31 mph)
Wheels:	14 Spoke Alloy
Tire Size:	Front: 3.25H-19 4PR Rear: 4.00H-18 4PR
Road Clearance:	145mm (5.7 in)
Saddle Height:	31.9 inches
Wheel Base:	1,420mm (55.9 in)
Overall Length:	US: 2,170mm (85.4 in) Europe: 2,220mm
Overall Width:	850mm (33.5 in)
Dry Weight:	211kg (465 lbs)
Climbing Angle:	30°