Mightyboy Specifications

Tune-Up, Wheel Alignment And Tyres.

1980-85 SS40V
550 1985-88 Alto,
Mighty Boy (SS40T) 1981-84 800 SS 80V
1987-89 Alto 800

ENGINE IDENTIFICATION* F5A F5A F8B

CAPACITY (litres) 0.543 0.543 0.796

COMPRESSION RATIO (:1) 9.2 9.2 8.7

DEVELOPED KILOWATTS @ rpm 19.2 @ 6000 19.2 @ 6000 29.5 @ 6000

TORQUE (Nm) @ rpm 35 @ 4000 35 @ 4000 59 @ 3500

VALVE CLEARANCES Cold, not running(1) Cold, not running(1) Cold, not running(1)

Inlet (mm) 0.13-0.18(1) 0.13-0.18(1) 0.13-0.18(1)

Exhaust (mm) 0.13-0.18(1) 0.13-0.18(1) 0.13-0.18(1)

COMP. PRESSURE (kPa) 980-1325 980-1325 980-1275

Maximum Variation (kPa) 100 100 100

IGNITION SYSTEM

SPARK PLUGS NGK BR-5ES ND W16EX-U NGK BP-5ES

Gap (mm) 0.7-0.8 0.7-0.8 0.7-0.8

Torque (N m) 24-29 24-29 24-29

DISTRIBUTOR Denso 33100-78319 Denso 33100-78319 Denso 33100-78410

Model or Service Number 029100-6750 029100-6750 029100-7270

Gap (mm) 0.4-0.5 0.4-0.5 0.45

Dwell (...°) 60±2 60±2 60±2

Spring Tension (N) NS NS NS

AUTOMATIC ADVANCE

Centrifugal - Starts (rpm) 900-1300 900-1300 NS

Intermediate (...° @ rpm) 7 @ 2000 7 @ 2000 NS

Maximum (...° @ rpm) 14-18 @ 3000 14-18 @ 3000 NS

Vacuum - Starts (mm Hg) 60-150 60-150 NS

Finishes (mm Hg) 220 220 NS

Maximum (...°) 7-11 7-11 NS

Total Advance (...°) 21-29 21-29 NS

CONDENSER CAPACITY (µF) 0.25 0.25 0.25

COIL Denso 33410-58013 Denso 33410-84010 Denso 33410-58020

Model or Service Number 029700-4960 029700-6001 029700-5560

Primary Resistance (§) 3.0(2) 3.0(2) 3.0

Ballast Resistance (§) 1.5 NA 1.5

TIMING SETTING

Degrees B.T.D.C. (@rpm) 10 ± @ below 950 10 ± @ below 950 7 ± @ below 900

FUEL SYSTEM

FUEL PUMP Mechanical Mechanical Mechanical

Pressure (kPa @ rpm) 19.6-29.4 @ NS 19.6-29.4 @NS 20-30 NS

Volume (L/min @ rpm) 0.2 min. @ 2000 0.2 min. @ 2000 NS

CARBURETTOR Mikuni Mikuni Mikuni

Auto. Choke Setting (notches) NA NA NA

CO% - Air Fuel Ratio (:1) NS NS NS

Mixture Screw Limiter cap Limiter cap Limiter cap

IDLE SPEED (rpm) 950 ± 50 950 ± 50 900 ± 50N

CHARGING SYSTEM

BATTERY Polarity Negative Negative Negative

SAA Assembly 12-1 12-1 12-1

Ampere Hours 24 24 40

BELT TENSION 10-15 mm(3) 10-15 mm(3) 8-10 mm(3)

ALTERNATOR / GENERATOR Denso 31400-78010 Denso 31400-85510 Mitsubishi A1T32371

Model or Service Number 021000-8130 100211-1470 31400-78431

Output (A @ rpm @ V) 35 @4000 @ 14.0 35 @4000 @ 14.0 40 @4000 @ 14.0

Field Resistance (§) 4.0-5.0 4.0-5.0 4.0-5.0

REGULATOR Denso 31400-78010 Denso 31400-85510 Mitsubishi A1T32371

Model or Service Number 02000-3670 100211-1470 31400-78431

Voltage Regulator (§ C) 13.8-14.8 @ N.O.T. 13.8-14.8 @ N.O.T. 14.1-14.7 @ 20

WHEEL ALIGNMENT

Caster +3°15' +3°15' +3°15'

Camber +1°20' +1°20' +1°20'

Toe In (mm) 2-4 2-4 3

Toe-Out on Turns

Outside Wheel 32° 32° 32°

Inside Wheel 38° 38° 38°

Steering Axis Inclination 12°50' 12°50' 12°50'

TORQUE SPECIFICATIONS

Cylinder Head (Nm) 55-60 55-60 55-60

Con-rod Bearings (Nm) 28-32 28-32 28-32

Main Bearings (Nm) 55-60 55-60 55-60

* Engine type located on decal on firewall. Engine number located on cylinder block below carburettor behind dipstick (Mighty Boy). Stanped on block below distributor (G13A engine).
(1) Hot settings, not running: 0.23-0.28 mm, inlet and exhaust.
(2) Includind ballast resistance.
(3) Deflection method, under a 98 N load.

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TYRE PRESSURE kPa

Front Rear

5.00-10.4 PR ULT 165 235

145/70 SR 12 260 210

145 SR 12 220 220

Normal Load.