POLARIS Engine Motor Crank Shaft Cylinder Head 1742

( Manufacturer Part Number: 870-70-99A3 )

Review POLARIS 870-70-99a3rmk Gen Engine Motor Cases Crank Shaft Cylinder Head Oem #1742 fits RMK 700 1999

The Polaris 870-70-99A3 RMK GEN 700 engine is a high-performance, reliable powerhouse specifically designed for use in snowmobiles from the Polaris RMK (Rocker Mountain King) lineup. This precision-engineered crankshaft cylinder head, part number 1742, is a crucial component of this powerful engine.

The crankshaft cylinder head plays a vital role in the engine's combustion process, housing the intake and exhaust ports where the cylinders connect to the combustion chamber. This particular part, the 870-70-99A3, is designed specifically for the Polaris 700cc, two-stroke, liquid-cooled engine.

Two crucial components of this crankshaft cylinder head are the intake and exhaust ports. The intake ports are responsible for drawing in the air-fuel mixture that will be used for combustion. They have been meticulously designed to maximize airflow and ensure a consistent, efficient fuel-air mixture enters the combustion chamber.

The exhaust ports, on the other hand, are responsible for expelling the burnt gases from the engine after the combustion process is complete. Efficient exhaust port design is essential for minimizing backpressure and maximizing engine power output.

This crankshaft cylinder head also features precision-machined surfaces and excellent material quality. Due to its durable nature and resistance to heat, it can withstand the demanding conditions found in snowmobiles, both in terms of temperature and engine stress.

Installed correctly, this 870-70-99A3 crankshaft cylinder head ensures a reliable and consistent engine performance. It's designed for seamless integration with other engine components, ensuring optimal compatibility and straightforward installation. Additionally, it offers excellent sealing ability, minimizing the risk of oil leaks or coolant loss and protecting the engine's internals from harsh cold environments.

In summary, the Polaris 870-70-99A3 RMK GEN 700 engine's crankshaft cylinder head is a robust and high-performing component that plays a pivotal role in the engine's combustion process, allowing for superior airflow, efficient exhaust, and reliable performance in extreme conditions.

Pros and Cons of Buying a Polaris 870-70-99A3 RMK Gen 700 Engine: Crankshaft, Cylinder Head (1742)

The Polaris 870-70-99A3 RMK Gen 700 Engine is an upgrade kit for snowmobiles, including the crankshaft and cylinder head (part number 1742). This engine is popular among enthusiasts for its increased power and durability, but like any purchase, it has its advantages and disadvantages. This analysis aims to provide an objective assessment of its merits and drawbacks.

1. Enhanced Performance: The upgraded engine offers increased horsepower, torque, and overall performance, ensuring a more enjoyable riding experience.

2. Improved Durability: The new crankshaft and cylinder head are designed for increased strength and longer lifespan, reducing the need for frequent repairs and maintenance.

3. Better Efficiency: This engine kit may lead to improved fuel efficiency, allowing riders to cover more distance on a single tank of gas.

1. Cost: The Polaris 870-70-99A3 RMK Gen 700 Engine kit is a significant investment. The purchase price alone is high, and additional costs like installation and potential aftermarket parts may add to the overall expense.

2. Complexity: Installing the engine kit may be a challenging task for those without mechanical expertise. It is recommended to use a professional service or to be extremely familiar with snowmobile engines to avoid complications.

3.Compatibility: This engine kit may only be compatible with specific Polaris snowmobile models, limiting its versatility for those with older or different models.

The decision to purchase the Polaris 870-70-99A3 RMK Gen 700 Engine kit depends on the individual's priorities and circumstances. Those seeking maximum power and improved durability will likely find the investment worthwhile. However, for those with limited budgets or those seeking a simpler solution, alternative options, such as a less expensive engine or upgrading other components, may be more suitable. Ultimately, thorough research, careful consideration, and a solid understanding of one's needs and constraints are crucial before making the investment in this engine kit.

1. Confirm Compatibility: Ensure that your Polaris snowmobile model is compatible with this engine kit before making a purchase. Contact Polaris or a reputable dealership for clarification if necessary.

2. Obtain Professional Assistance: If you're not confident in your mechanical abilities, consider having a professional install the engine kit for you to minimize potential complications.

3. Explore Financing Options: If the cost is a concern, investigate financing options through Polaris or a trusted financing provider.

4. Research Alternative Upgrade Options: If the cost or complexity of the engine kit is not feasible, look into other engine upgrades, performance parts, or maintenance procedures that may provide similar benefits at a lower cost.

5. Build a Solid Support Network: Connect with other Polaris snowmobile enthusiasts to discuss their experiences with the engine kit and share tips on how to maximize performance, minimize costs, and effectively maintain the upgraded engine.

Details:

1999 POLARIS RMK 700. NAMPA, ID 83651. SHOW GOOD COMPRESSION, 140psi, IN BOTH CYLINDERS.

part #: 8707099a3 prices

• $225.94-$899.99

specifications enginesnowmobile:

• for models: Rmk, 700
• for makes: Polaris
• for years: 1999
• mpn: 870-70-99a3

returns enginesnowmobile:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

payments enginesnowmobile:

• credit card: Mastercard
• wallet: Google-pay
• other
• cash

seller enginesnowmobile:

• # reviews: 31995
• city: Nampa, Idaho
• rating: 99.7%

shipping enginesnowmobile:

• service: Standard
• class: Standard
• type: Fixed
• transit: 5-10 Days
• cost: $0.00

offer enginesnowmobile:

• options: Ship-to-home
• started: January 18, 2025
• availability: In Stock
• sold: 0
• quantity: 1

general enginesnowmobile:

• condition: Used
• Snowmobile Parts > Engines Components > Complete Snowmobile Engines

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