1999 YAMAHA YB-1
1999 YAMAHA YB-1 Specifications
| Maker | YAMAHA | Engine Type | 2-stroke/Air-cooled/Rotary Disc Valve |
| Model name | YB-1 | Engine Starting Method | Kick Starter |
| Type · Grade | - | Maximum Output (ps) | 4.6ps(3.4kw)/6000rpm |
| Engine Operation | 2 stroke | Maximum Torque (kgf/m) | 0.56kg・m(5.5N・m)/5500rpm |
| Model | Vehicle Weight (Dry Weight) | 75 kg | |
| Displacement | 49 cc | Vehicle Weight (Curb Weight) | 84 kg |
| Release year | 1999 | Length(mm)・Height(mm)・Width(mm) | 960 x 665 x 1760 |
| Fuel Efficiency by Catalog | 80 km/L | Seat Height | - |
| Fuel Tank Capacity | 7.2 liters | Front Tire Indication | 2.25-17 33L |
| Fuel Supply | Carburetor | for Rear Tire Indication | 2.50-17 38L |
1999 YAMAHA YB-1 Service Data
| Standard Plug | - | Sprocket size | Drive Sprocket Teeth Number - Driven Sprocket Teeth Number - |
| Number of Used Plugs | - | Chain Size | 420 |
| Plug Gap | - | Battery Code | YT4B-BS |
| Engine Oil Amount | 1.4 | Head Light | - Headlamp Type: - |
| Engine Oil (Refill) | - | Headlamp Remarks | - |
| Engine Oil (Element Replacement) | - | Tail Light | - - |
| Front Blinker Rating | - | Rear Blinker Rating | - |
1999 YAMAHA YB-1 Service Data (Detail)
| Motor Model Code | F5B |
| Bore (mm) | 40 |
| Stroke (mm) | 39.7 |
| Compression Ratio | 7.1 |
| Ignition Method | C.D.I. |
| Engine Lubrication Type | Separation Lubrication |
| Frame Type | Backbone (Press) |
| Minimum Rotaion Radius | 1.8 |
| Caster Angle | 26.5度 |
| Trail Amount (mm) | 75 |
| Minimum Ground Clearance | - |
| Distance Between Axes | - |
| Turning Angle (Right) | - |
| Turning Angle (Left) | - |
| Seating Capacity | 1 |
| Fuel Tank Reserve Capacity | - |
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