Aktiv Grizzly
Aktiv Grizzly is dual-track snowmobile manufactured by Aktiv Maskin Östersund AB in Sweden.
The snowmobile is equipped with dual 38 x 384 cm tracks and single front ski. Also dual front skis has been available for XP. Tracks cover area almost 1 m2, making it well suited for deep-snow operations.
The Grizzly is powered by a 497 ccm Rotax 503 Scandinavia, producing 38 HP at 5700 RPM. The carb is a VM 32, supplied by . Earlier Grizzly have 1+N+1 gearbox and last model have 1+N+2 gearbox.
The Grizzly was produced from 1979 to 1991. It is still recognized one of the best dual track snowmobile in the world. Both Bombardiers Ski-Doo Alpine, Ski-Doo Alpine 2 and Ockelbo 8000 are similar dual-track snowmobiles.
In the mid 80's, the Grizzly switched from the traditional wheelbased bogie to a flexible joint-bogie, which made the ride smoother and the passability much better.
Aktiv started making tracked vehicles 1957 when they started making Snow Trac, a small personal Snowcat that is roughly the size of a modern compact car. Aktiv started making small snowmobiles in 1973 when they bought Snö-Tric brand. First dual-Trac snowmobile made by Aktiv was Snö-Tric Blå 75- and SC 20/2 75-.
The Grizzly was also produced and sold on license by Polaris Industries under the name "Polaris Grizzly de luxe". This version had a Fuji 440 ccm engine. Also Finnish company Winha sold earlier grizzly with own brand name Winha. Winha Grizzly had either traditional wheelbased bogie or flexible joint-bogie and it was equipped either with Artic Spirit AB 50, A3 engine or Fuji EC 44-2PM-3000 engine.
Currently there are two dual-track snowmobile in production, one in Russia under the name "Buran" and one in Italy under the name "Alpina Sherpa".
Technical Data
| Overall length | 309 cm | - |
| Overall width | 97 cm | - |
| Overall height | 141 cm | - |
| Overall weight | 375/345 kg | - |
| Motor make | Rotax | - |
| Motor type | 503 Scandinavia | - |
| Number of cylinders | 2 | - |
| Displacement | 497 ccm | - |
| Bore | 72 mm | - |
| Stroke | 62 mm | - |
| HP @ 5700 RPM | 38 | - |
| Max. RPM | 5700 | - |
| Fuel lubrication | 2 Stroke Oil 50:1 | - |
| Cooling System | Axial Fan | - |
| Idle RPM | 2100 | - |
| Ignition/Generator | CDI 12V/140W | - |
| Spark Plug | NGK B7ES, B8ES or similar | - |
| Spark gap | 0,5 mm | - |
| Carburettor | 1x Mikuni VM 32 | - |
| Fuel | Unleaded Petrol, 90 Oc. or better | - |
| Engine Variator | Polaris/AKTIV | - |
| Secondary Variator | Polaris/AKTIV | - |
| Gear Exchange | 3,0:1 - 1:1 | - |
| Transmission | FWD 3,07:1 / REV 4,82:1 | XP R+N+2 |
Links and resources
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