yamaha blaster 200 big bore kit

Lemon

3 min read

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05-02-2025

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The Yamaha Blaster 200 is a legendary ATV, known for its rugged reliability and playful handling. But for many owners, the stock engine's power just isn't enough. That's where a big bore kit comes in—a popular modification that transforms the Blaster from a fun little ride into a powerful, adrenaline-pumping machine. This guide delves into everything you need to know about Yamaha Blaster 200 big bore kits, from choosing the right kit to installation and maintenance.

Understanding Big Bore Kits

A big bore kit increases the engine's displacement by enlarging the cylinder bore. This allows for a larger piston, leading to a significant increase in horsepower and torque. While seemingly simple, choosing and installing a big bore kit requires careful consideration. A poorly chosen or improperly installed kit can lead to engine damage and decreased reliability.

Key Considerations When Choosing a Kit:

• Kit Manufacturer: Reputable manufacturers like Athena, ProX, and Wiseco offer high-quality kits with precise tolerances. Researching the manufacturer's reputation is crucial. Look for companies with a history of producing reliable and durable performance parts.

• Bore Size: Common upgrades range from +2mm to +4mm increases in bore size. Larger bore sizes yield more power but can impact engine longevity if not properly balanced with other modifications (discussed below).

• Kit Components: A complete kit typically includes a new piston, cylinder, rings, gaskets, and sometimes even a new head gasket. Ensure the kit is specifically designed for the Yamaha Blaster 200.

• Your Riding Style: Consider your riding style. A mild big bore kit is ideal for trail riding and general recreation. For more aggressive riding, a larger displacement kit might be more suitable, but always prioritize engine reliability.

Beyond the Big Bore: Essential Supporting Modifications

A big bore kit is only as good as the supporting modifications. Upgrading only the bore risks damaging the engine. Consider these crucial supporting upgrades:

• High-Performance Air Filter: A stock air filter restricts airflow, becoming a bottleneck with the increased displacement. A high-flow air filter, such as a Uni Filter or K&N, is essential to provide the engine with the necessary air supply.

• Performance Exhaust: A restrictive exhaust system hinders the engine's ability to breathe efficiently. Consider upgrading to a performance exhaust pipe designed to complement the big bore kit. This will significantly improve power delivery and overall performance.

• Carburetor Jetting: A larger bore necessitates adjusting the carburetor jetting. The increased airflow demands more fuel to maintain the proper air/fuel ratio. Incorrect jetting can lead to lean running conditions, damaging the engine. Professional tuning is highly recommended for optimal performance and longevity.

• High-Octane Fuel: A big bore kit will require higher-octane fuel to prevent detonation. Using lower-octane fuel can damage the piston and cylinder.

Installation and Maintenance

Installing a big bore kit requires mechanical aptitude and the right tools. While some DIY enthusiasts tackle this project, it's strongly recommended to have a qualified mechanic perform the installation. Improper installation can lead to costly repairs or engine failure.

Regular maintenance is crucial after installation. This includes:

• Regular Oil Changes: More frequent oil changes are needed due to the increased stress on the engine.
• Air Filter Cleaning: Keep the air filter clean to ensure optimal airflow.
• Spark Plug Inspection: Regularly check the spark plug for signs of wear or fouling.

Conclusion: Unlocking the Blaster's Potential

A Yamaha Blaster 200 big bore kit offers a significant performance boost, transforming this already fun ATV into a powerful machine. However, success hinges on careful planning, choosing the right kit, performing essential supporting modifications, and diligent maintenance. Remember to prioritize proper installation and ongoing care to enjoy the increased power reliably and safely. This is not a project to undertake lightly; seeking professional advice is always a wise choice for optimal results and engine longevity.