Technical specifications
|
| Model: |
490 Alpha 1 |
| Years: |
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°
|
|
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
|