Identification | ||
Letter designation | B4 | |
Color | ||
Frame # | ||
Engine # | ||
Dimensions | ||
Overall length |
2,150 mm | |
Overall width |
855 mm | |
Overall height |
1,195 mm | |
Wheelbase | 1,450 mm | |
Road clearance | 145 mm | |
Dry weight | 218 kg | |
Fuel tank capacity | 14.5 l | |
Performance | ||
Climbing ability | ||
Braking distance | ||
Minimum turning radius | ||
Engine | ||
Type | 4 stroke, DOHC, 2 cylinder, air cooled | |
Bore and stroke | 78.0 mm x 78.0 mm | |
Displacement | 745 cc | |
Compression ratio | 8.5 | |
Maximum horsepower | 55 hp | |
Maximum torque | 6.0 kg-m @ 3,000 rpm | |
Valve timing | ||
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Open Closed Duration |
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Open Closed Duration |
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Carburetors | (2) Mikuni BS38 | |
Lubrication system | Wet sump | |
Engine oil | Type | SAE 10W40, 10W50, 20W40, 20W50 |
Capacity | 4.0 l | |
Starting system | ||
Ignition system | Battery and coil (transistorized) | |
Cylinder numbering method | ||
Firing order | ||
Ignition timing | From 5° BTDC @ 1,000 rpm to 30° BTDC @ 3,750 rpm | |
Spark plugs | NGK B6ES or ND W20ES-U | |
Transmission | ||
Type | 5 speed, constant mesh, return shift | |
Clutch | Multi-disc, wet | |
Gear ratio | 1st | 2.33 |
2nd | 1.63 | |
3rd | 1.27 | |
4th | 1.04 | |
5th | 0.89 | |
6th | - | |
Primary reduction ratio | 2.48 | |
Final reduction ratio | 2.38 | |
Overall drive ratio | 5.23 @ top gear | |
Electrical equipment | ||
Alternator | ||
Regulator/rectifier | ||
Ignition coils | ||
Battery | ||
Starter motor | ||
Headlight | Type | |
Bulb | 12V 50/35W | |
Tail/brake light | 12V 8/27W | |
City light |
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Turn signal lights | 12V 23W | |
Meter lights | 12V 3.4W | |
Indicator lights | 12V 3.4W | |
Horn | 12V 2.5A | |
Frame | ||
Type | ||
Steering angle | ||
Castor | 63.5° | |
Trail | 105 mm | |
Tire size | Front | 3.25 - 19 |
Rear | 4.00 - 18 | |
Suspension | Front | |
Rear | ||
Suspension stroke | Front | |
Rear | ||
Front fork oil | Type | |
Capacity | ||
Oil level | ||
Brakes | ||
Type | Front | |
Rear | ||
Effective disc diameter | Front | |
Rear |