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Description
Sleigh Hitch
Technical Specifications
- MFG. Part Number 12-101-02
Vehicle Information
Arctic Cat EXT 399 Snowmobile (1971)
The 1971 Arctic Cat EXT 399 was a performance-oriented snowmobile designed for racing, marking the first year of production for the EXT line. These models were built on the newly introduced Puma short chassis and featured Kawasaki free-air engines. For the 1971 model year, the EXT line included the standard EXT 399 racing model and the EXT Special 399A, which likely designated a specialized version with a Kawasaki engine. One source also mentions a 1971 Arctic Cat EXT Cross Country Racer (model 399APA) built on a Panther chassis. The 1971 model year was the inaugural year for the Arctic Cat EXT, meaning there were no mid-cycle generation or engine changes for the 399cc engine within that specific year. The EXT models, including the 399, were entirely new for 1971. FAQ:
Q: Are parts for the 1971 Arctic Cat EXT 399 compatible with other EXT models?
A: Compatibility can vary significantly between model years and trims. Please use our year and edition selector to ensure you find parts specifically designed for your 1971 Arctic Cat EXT 399.
Maintenance
| Component | Interval | Details |
| Fuel Strainer/Filter | Inspect and service as needed, especially if fuel delivery issues arise. | Two-stroke engines typically mix oil with fuel. The manual mentions a fuel strainer/filter rather than a dedicated engine oil filter. |
| Drive Belt | Inspect before each season or long rides. Replace if necessary. | Check for wear (cracks, missing chunks, exposed cordage). A new belt requires a break-in period of approximately 40 to 50 km at half throttle or less. |
| Spark Plug | Inspect regularly and replace as needed. | Set gap at 0.50 mm. Decarbonize as needed for optimal performance. |
| Air Filter | Clean before each weekend of riding (recreational) or before each practice/race (competitive). | Inspect periodically for dirt buildup or discoloration. Clean or re-oil if dry or dirty. |
| Coolant | Not applicable (air-cooled engine). | The manual recommends regularly cleaning the cooling air entrance ports and fins with compressed air for optimal efficiency. |