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The Honda MB5 is a 50cc, 5 speed motorcycle that was only imported into the US in 1982. It is, in fact, not a moped at all. However, it fits into moped culture due to its small displacement 2-stroke engine. Some features found on the MB5 were a speedometer, a tachometer (with a redline of 10,500 rpm), front disc brake, and Honda's Comstar wheels. The MB was the road oriented version of the Honda MT50.
Tech Specs
| Dimensions | |
|---|---|
| Overall Length | 74 in (1880mm) |
| Overall Width | 27.8 in (705 mm) |
| Overall Height | 40.4 in (1025mm) |
| Wheelbase | 47.8 in (1215 mm) |
| Seat Height | 29.5 in (750 mm) |
| Foot Peg Height | 12.2 in (310 mm) |
| Ground Clearance | 6.3 in (160 mm) |
| Dry Weight | 174 lb (79 kg) |
| Curb Weight | 198 lb (90 kg) |
| Frame | |
| Type | Cross line backbone |
| Front Suspension, travel |
Telescopic fork (dampenerod), 4.9 in (125 mm) |
| Rear Suspension, travel |
Swingarm/twin shock absorber, 3.5 in (90mm) |
| Gross Vehicle Weight Rating | 416.7 lb (189 kg) |
| Vehicle Capacity load | 220.5 lb (100 kg) |
| Tire Size, front & rear | 2.50 x 18 |
| Tire Pressure, front rear |
25 psi (175 kPa) front 32 psi (225 kPa) rear |
| Front brake, lining swept area | Single disc brake, 59.6 sq in (384 sq cm) |
| Rear brake, lining swept area | Internal expanding shoe, 13.4 sq in (86.4 sq cm) |
| Fuel Capacity | 2.4 US gal (9.0 liters) |
| Fuel reserve capacity | 0.5 US gal (2.0 liters) |
| Caster angle | 25 degrees |
| Trail | 2.8 in (70mm) |
| Front Fork Oil Capacity | 2.54 ozs (75 cc) |
| Engine | |
| Type | Air cooled 2-stroke, reed valve |
| Cylinder arrangement | Single cylinder 40 degree incline |
| Bore and Stroke | 39.0 x 41.4 mm (1.54 x 1.63 in) |
| Displacement | 49cc (2.98 cu in) |
| Compression ratio | 7.6:1 |
| Max Horsepower | 7.0 BHP @ 9000 rpm |
| Max Torque | 4.05 ft-lb (5.6 N-m) |
| Oil Capacity, transmission Oil tank |
1.1 US qt (1.0 liters) 1.2 US qt (1.1 liters) |
| Lubrication system | Forced (eng) and wet sump (tranny) |
| Air Filtration | Oiled polyurethane foam |
| Cylinder compression | 185 psi (1275 kPa) |
| Engine weight | 38.6 lb (17.5 kg) |
| Idle Speed | 1400 rpm |
| Carburetion | |
| Carb Type | PF 15, 16mm venturi bore |
| ID Number | PF 15A |
| Air Screw initial setting | 1 3/8 turns out |
| Float level | 13.5 mm (0.53 in) |
| Main jet, standard | #105 |
| Main air jet, standard | #210 |
| Jet needle & position, standard | 37B - 2nd groove |
| Slow/Pilot jet, standard | #38 |
| Drive Train | |
| Clutch | Wet, multi-plate |
| Transmission | 5-speed constant-mesh |
| Primary reduction | 4.117 |
| Final reduction (sprockets) | 3.307 (43/13) |
| Gear ratios, 1 to 5 | 3.083, 1.882, 1.400, 1.130, 0.960 |
| Gear shift pattern | left foot operated, 1-N-2-3-4-5 |
| Electrical | |
| Ignition | CDI (Capacitor Discharge Ignition) |
| Ignition timing "F" mark | 19 +or- 3 degrees BTDC @ 3000 rpm |
| Full retard | 10 +or- 5 degrees BTDC @ 7000 rpm |
| Starting system | Primary kickstarter |
| Generator | AC generator 66W @ 5000 rpm |
| Battery capacity | 12V - 2.5 AH (YB2.5L-C) |
| Spark plug, standard extended high speed riding cold climate, below 5 C or 41 F |
NGK BR8HS, ND W24FSR NGK BR9HS, ND W27FSR NGK BR7HS, ND W22FSR |
| Spark plug gap | 0.6-0.7 mm (0.024-0.028 in) |
| Fuse | 7 Amp |
| Lights | |
| Headlight (high/low beam) | 31.5/30 W (sealed beam) |
| Tail/Stoplight | 8/27W 3/32 cp (#1157) |
| Front turn signal | 23W 32 cp (#1073) |
| Rear turn signal | 23W 32 cp (#1073) |
| Speedometer light | 3.4W 2 cp (#158) |
| Tachometer light | 3.4W 2 cp (#158) |
| Neutral light | 3.4W 2 cp (#158) |
| Turn signal indicator | 3.4W 2 cp (#158) |
| High beam indicator | 1.7W 1 cp (#53) |
MB5 Threads
Some threads covering a lot of questions / issues people have had with mb5's
External Links
- MB5 Supersite -- An awesome site for MB5 lovers. Lots of good technical information and advice.
- MB5 Forums -- MB5 owners forum.
- MB5 parts list -- This site has really useful exploded diagrams so you know where everything goes.
- Honda Manuals -- more MB5 wiring diagrams, parts and owner's manual downloads
- MB5 Shop Manual -- 90MB, high resolution, good quality
- MB5 commercial -- Honda MB5 commercial from back in the day.
- Honda MB5 Owners -- Honda MB5 Owners (FB login required), small community of MB5 owners across the world.
