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Description
Comet's 8-inch 108 EXP is designed for high horsepower applications up to 150 HP which exceeds the limits of the well-known 7.5 inch Comet 102C. Specifications on the EXP are the same as the familiar 108C. Comet's open faced design has delivered unsurpassed reliability, easy servicing and unlimited tuning capabilities for decades on both stock sleds and on mods. The EXP will handle engagement speeds up to 5000 RPM.
FEATURES
- Wider roller for increased bearing area. Increases durability
- Larger diameter floating cam arm bolt for increased wear resistance
- Uses same tuning parts as 108C
- Built to handle high horsepower engines
- Continual/consistent smooth shifting, after hours of use
- Tried and tested in high horsepower machines
- Weights and springs are not included
Technical Specifications
- MFG. Part Number 217504A
Vehicle Information
Polaris Indy 340 Snowmobile (1999-2007)
The Polaris Indy 340, produced between 1999 and 2007, was a popular snowmobile model known for its reliability and simplicity. It consistently featured a 339cc fan-cooled twin-cylinder engine, generally rated at approximately 36 horsepower. This 2-stroke, reed valve, carbureted engine remained a defining characteristic throughout its production, ensuring predictable performance for trail enthusiasts. While the 339cc engine remained largely consistent, the chassis underwent a notable evolution. Earlier models utilized the traditional “Indy” chassis, while later models, starting in 2004 and becoming predominant by 2006, transitioned to the more rugged “EDGE” chassis. The “LX” trims that appeared in 2007 were also part of the EDGE chassis lineup, succeeding the “Classic” versions. FAQ:
Q: How can I ensure part compatibility for my Polaris Indy 340?
A: To guarantee part compatibility, please use our year and trim selector located at the top of this page. It will help you find the exact components for your specific model.
Maintenance
| Component | Interval | Details |
| Engine Oil and Filter | 800 km or 6 months, or 1 600 km or 1 year following initial break-in | Check level before every ride. Some manuals suggest changing every 3 200 km or 200 hours. |
| Drive Belt | 800 km or 6 months | Inspect and adjust. Replace as needed. Inspection and replacement suggested at 50 hours or 800 km. |
| Spark Plug | 3 200 km or 2 years | Inspect and replace as needed. Some schedules indicate annual inspection and replacement or at 1 600 km. |
| Air Filter | Before every ride (cleaning and inspection) | Clean and inspect, replace as needed. Replacement suggested at 50 hours / 1 600 km / 1 year following initial break-in. |
| Coolant | Check level before every ride. Test strength and inspect for leaks every 800 km or 6 months. Flush system every 8 000 km or 5 years. | Daily level check recommended. Seasonally inspect coolant strength and yearly pressure test the system. Some manuals recommend changing every two years. |