The Maico 490 Alpha 1 is a motorcycle model from 1982. It has a single cylinder, two-stroke engine with a capacity of 488cc and a compression ratio of 12:1. The fuel system is Bing, with a 40mm carburetor and the ignition is Motoplat pointless electronic. It has a kick start and chain final drive. The frame is dual down tube, full cradle, chrome-molydenum, and the suspension is leading axle, air/spring fork on the front and a single gas shock with adjustable damping and preload on the rear. The front and rear brakes are both single leading shoe, drum, with wheels made of Akront aluminum alloy, laced wire spokes. The Rake is at 28.5 degrees and the Trail is at 126mm/4.96in. The dry weight of this motorcycle is 108kg/237lbs and wet weight is 113kg/249lbs with a fuel capacity of 9.5L/2.5 US gal. A review on Pulpmx.com suggests that the Maico 490 Alpha 1 is a powerful and competitive choice for motocross racing.
Technical specifications:
Make Model: Maico 490 Alpha 1
| Year | 1982 |
|---|---|
| Engine | Single cylinder, two stroke |
| Capacity | 488 cc / 29.8 cub in. |
| Bore x Stroke | 86.5 x 83 mm |
| Cooling System | Air cooled |
| Compression Ratio | 12:1 |
| Lubrication | Oil in fuel, premix |
| Fuel/oil ratio | 20:1 |
| Oil Capacity | 0.60 L / 0.63 US quarts |
| Exhaust | Upswept with repackable silencer |
| Fuel System | Bing, 40 mm carburetor |
| Ignition | Motoplat pointless electronic |
| Spark Plug | Champion NZ, N84G or NGK B9ES |
| Starting | Kick start |
| Max Power | 32.1 kW / 43.7 hp @ 6500 rpm |
| Max Torque | 36.5 Nm / 3.7 kgf-m / 26.9 ft/lb @ 6000 rpm |
| Clutch | Wet, multi-disc |
| Transmission | 5-Speed, constant mesh |
| Final Drive | Chain |
| Gear Ratio | 1st 2.71 / 2nd 1.97 / 3rd 1.50 / 4th 1.20 / 5th 1.00:1 |
| Frame | Dual down tube, full cradle, chrome-molydenum |
| Front Suspension | Leading axle, air/spring fork |
| Front Wheel Travel | 305 mm / 12 in. |
| Rear Suspension | Corte & Cosso reservoir single gas shock adjustable for damping and preload |
| Rear Wheel Travel | 320 mm / 12.6 in. |
| Front Brakes | Single leading shoe, drum 136 mm |
| Rear Brakes | Single leading shoe, drum 160 mm |
| Wheels | Akront, aluminium alloy, gold anodized, laced wire spokes |
| Front Rim | 1.60 x 21 in |
| Rear Rim | 2.15 x 18 in. |
| Front Tyre | 3.00 x 21 in., Metzeler, moto cross |
| Rear Tyre | 4.50 x 18 in., Metzeler, moto cross |
| Rake | 28.5 degrees |
| Trail | 126 mm / 4.96 in |
| Wheelbase | 1510 mm / 59.5 in. |
| Ground Clearance | 372 mm / 14.6 in. |
| Seat Height | 960 mm / 37.7 in. |
| Dry Weight | 108 kg / 237 lbs |
| Wet Weight | 113 kg / 249 lbs |
| Fuel Capacity | 9.5 L / 2.5 US gal |
| Review | Cycle, April 1982, Pulpmx.com |
