Comet 108EXP Clutch
03-217504 (MFG #: 217504A)
$584.20
Sale price
$584.20
Regular price
$599.99
Sale
-2%
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Comet 108EXP Clutch for Ski-Doo Formula Z 670 Snowmobile
Comet 108EXP Clutch for Ski-Doo Formula Z 670 Snowmobile
$584.20
Sale price
$584.20
Regular price
$599.99
Sale
-2%
SKU:03-217504
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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
Ski-Doo Formula Z 670 Snowmobile (1998-1999)
The Ski-Doo Formula Z 670, available for the 1998 and 1999 model years, was a performance snowmobile known for its robust engine. Powered by a 669cc liquid-cooled twin-cylinder Rotax engine, it delivered impressive power for its time. In 1998, the model featured an A.R.M. (Advanced Rider Management) rear suspension with 11 inches (28 cm) of travel, enhancing control and comfort. For 1999, the Formula Z 670 received a significant upgrade with the introduction of the 670 H.O. (High Output) engine. This improved engine boosted horsepower from 115-119 hp to approximately 125-130 hp and incorporated the DPM (Digital Performance Management) system for optimal jetting, along with the DESS (Digital Encoded Security System) security system. There were no distinct sub-trims for this model, with the H.O. designation referring to an engine upgrade rather than a separate trim level. Frequently Asked Questions:
Q: How can I ensure parts fit my Ski-Doo Formula Z 670?
A: Use our year and model selector at the top of the page to find the exact parts for your snowmobile.
Maintenance
| Component | Interval | Details |
| Oil (2-stroke injection oil) | Before every ride | Check oil reservoir level. Running out of injection oil can severely damage the engine. Use high-quality 2-stroke injection oil (TC-W3 or manufacturer-specific). |
| Engine oil filter | Not applicable | 2-stroke engines like this typically do not have a traditional engine oil filter, as oil is injected directly into the fuel system. |
| Drive belt | Before every ride / Every 1 to 3 years | Inspect the belt for wear, cracks, or flat spots. Replace if any signs of wear are present. General replacement is suggested every 1 to 3 years depending on usage. |
| Spark plugs | Annually or every 50 to 100 hours | For 2-stroke engines, it is recommended to replace spark plugs annually to ensure optimal performance and avoid starting issues. |
| Air filter | Inspect every 8,000 to 9,600 km | Clean or replace depending on riding conditions and filter type. More frequent service is needed in dusty environments. |
| Coolant | Every 2 years | Check coolant level before every ride (when the engine is cold). Replacement every 2 years is generally recommended for liquid-cooled snowmobiles. |
The maintenance intervals below are general recommendations. For the precise specifications for your 1998-1999 Ski-Doo Formula Z 670, please consult the official owner's manual.