MIKUNI 25560-M363640-90 Rebuild Jet Ski Kit Sea Doo

( Brand: Mikuni ), ( Manufacturer Part Number: 25560-M363640-90 ), ( Part Type: Jet )

Review MIKUNI Super Bn Rebuild Kit Sea doo Jet Ski fits GTS 1992–2001

The **Mikuni 25560-M363640-90 Rebuild Kit** is a meticulously engineered, high-performance upgrade designed specifically for the **1992 2001 Sea-Doo GTS Jet Ski**, ensuring optimal throttle response, reliability, and longevity for this iconic two-stroke powerhouse. This premium rebuild kit is crafted to restore or enhance the stock **Mikuni 36mm carburetor**, a critical component that governs fuel-air mixture, ignition timing, and overall engine efficiency in the GTS s high-revving, high-output 250cc or 300cc two-stroke motor. Built with a focus on precision, the kit includes a **comprehensive set of replacement parts**, including the **throttle body, butterfly valve, gaskets, seals, springs, and internal carburetor components**, all sourced from Mikuni s trusted manufacturing facility to meet exacting OEM specifications. The **M363640-90 model** is particularly noteworthy for its **adjustable throttle linkage**, allowing riders to fine-tune the carburetor s response for smoother acceleration, better idle stability, and reduced hesitation critical for the GTS s aggressive handling and top-end performance. Whether you re restoring a neglected unit or upgrading an existing carburetor for improved throttle control, this kit eliminates common issues like **vacuum leaks, sticky butterflies, or worn seals**, which can lead to sluggish power delivery or excessive fuel consumption. The inclusion of **high-quality Mikuni seals and gaskets** ensures a tight, leak-free fit, while the **durable stainless steel springs** maintain consistent tension, preventing premature wear and ensuring consistent performance across varying temperatures and riding conditions. For enthusiasts seeking to maximize the GTS s legendary acceleration and top-speed potential, this rebuild kit is an indispensable solution, bridging the gap between stock reliability and aftermarket performance without compromising the original engine s character. With straightforward installation and minimal tools required, it empowers both novice and experienced mechanics to breathe new life into their Sea-Doo s carburetion system, delivering a noticeable improvement in throttle smoothness, fuel efficiency, and overall engine responsiveness.

The Mikuni 25560-M363640-90 rebuild kit is designed for the 1992 2001 Sea-Doo GTS jet ski, specifically for its 250 300 cc two-stroke engine. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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1. **Performance Improvement:** A rebuild kit replaces worn or damaged internal components, restoring or enhancing engine performance. This can result in better throttle response, smoother operation, and increased power output, especially if the engine was previously neglected or overworked.

2. **Cost-Effective Alternative:** Compared to a full engine replacement, a rebuild kit is significantly cheaper. For a Sea-Doo GTS, which can be expensive to restore or replace entirely, a rebuild kit offers a practical way to extend the life of the engine without a major investment.

3. **Preventative Maintenance:** Using a rebuild kit allows you to proactively replace parts like pistons, rings, bearings, and seals before they fail catastrophically. This can prevent unexpected breakdowns during rides, which are particularly dangerous on the water.

4. **Compatibility and Availability:** Mikuni is a reputable brand with a history of producing high-quality engine components. The rebuild kit is specifically designed for the Sea-Doo GTS, ensuring compatibility with the engine s specifications. While parts may not be as readily available as they once were due to Sea-Doo s discontinuation of production, Mikuni kits are still a reliable source for aftermarket parts.

5. **Ease of Installation:** The kit typically includes detailed instructions and often comes with gaskets, seals, and other small parts that simplify the rebuild process. For someone with mechanical experience or access to a mechanic familiar with two-stroke engines, this can be a manageable DIY project.

6. **Environmental Considerations:** Two-stroke engines, while powerful, are known for their oil consumption and emissions. A rebuild can help optimize the engine s efficiency, though it s worth noting that two-stroke engines are inherently less efficient than modern four-stroke alternatives. If you re committed to using a two-stroke Sea-Doo, a rebuild ensures it runs as cleanly as possible.

7. **Resale Value:** If you plan to sell the jet ski later, a well-maintained or rebuilt engine can make the GTS more attractive to buyers who prioritize reliability and performance.

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1. **Labor-Intensive Process:** Rebuilding a two-stroke engine, even with a kit, requires disassembly, cleaning, inspection, and reassembly. This process can be time-consuming and may require specialized tools (e.g., piston ring compressors, micrometers for measuring wear). For someone without mechanical experience, this could be a significant challenge.

2. **Skill Dependency:** Proper engine rebuilding demands knowledge of two-stroke mechanics, including correct gap settings for pistons, rings, and valves, as well as proper lubrication techniques. Mistakes during reassembly such as incorrect torque values or improperly seated seals can lead to premature failure or damage to the engine.

3. **Hidden Damage:** Even with a rebuild kit, underlying issues like warped crankcases, seized bearings, or excessive wear in non-replaced parts (e.g., the flywheel or clutch) may not be addressed. A thorough inspection by a professional is often necessary to identify these problems, which could add to the cost.

4. **Warranty and Support:** Aftermarket rebuild kits like this one typically come without a manufacturer warranty, especially for older models. If something goes wrong post-rebuild, you ll be responsible for troubleshooting and repairs without support from Mikuni or Sea-Doo.

5. **Environmental and Legal Concerns:** Two-stroke engines are increasingly restricted in many areas due to their pollution. Some regions have banned or heavily regulated their use. Before committing to a rebuild, check local laws to ensure compliance, as you may need additional modifications (e.g., catalytic converters or emissions controls) to operate legally.

6. **Depreciation and Longevity:** The Sea-Doo GTS is an older model, and even with a rebuild, its overall condition may limit its longevity. Other components (e.g., drive systems, steering, or electrical parts) may also be worn out, requiring additional investments to keep the jet ski operational.

7. **Alternative Options:** For those considering long-term use, exploring a four-stroke conversion or purchasing a newer used jet ski might be more practical. While a rebuild kit can revive the GTS, it may not be the most sustainable solution if you re looking for a low-maintenance ride.

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The Mikuni 25560-M363640-90 rebuild kit is a viable option for restoring or maintaining the engine of a 1992 2001 Sea-Doo GTS, particularly if you re an enthusiast who enjoys working on projects or have access to mechanical support. It offers a balance between cost savings and performance gains, making it attractive for those who want to keep their GTS running without a full engine replacement. However, the process is labor-intensive and requires mechanical skill, and it may not address all underlying issues in the jet ski. Additionally, the environmental and legal challenges associated with two-stroke engines should not be overlooked.

If you re comfortable with the rebuild process and have inspected the engine thoroughly (or had it inspected by a professional), this kit can be a rewarding investment. For those less experienced or unwilling to commit to the work, consulting a specialist or considering alternative options (like a four-stroke conversion) may be wiser.

- You have mechanical experience or are willing to learn and invest time in the process.

- You ve confirmed that the engine s other components (e.g., clutch, drive system) are in good condition or are prepared to address them separately.

- You re aware of and compliant with local environmental regulations regarding two-stroke engines.

- You value the performance and nostalgia of your Sea-Doo GTS and are willing to maintain it long-term.

- You lack the time, tools, or mechanical skill to complete the project successfully.

- You ve identified significant issues beyond the scope of the rebuild kit (e.g., warped crankcases, seized bearings).

- You re considering selling the jet ski soon, as the rebuild may not justify the cost for a short-term ownership.

- You re open to exploring a four-stroke conversion or a newer used jet ski as a more sustainable alternative.

Details:

This is helpful if you are buying multiple items. Mikuni Super BN Rebuild Kit for 1992 2001 Sea-Doo GTS Jet Ski: Carburetor Kit, Contains: one kit to rebuild a single carb, Actual Contents May Vary From Photo, Carb Fits Yamaha model's with smaller body BN38/ BN44 carbs, Needle and seats sold separately. 1996 - 1997 Polaris SLT 780, 2005 Sea-Digit, 1992 1997 Sea-Digits, 1997 Sea-Doo GSX, 1997 Carlo 1000These model's have an external fuel pump, the pump components in rebuilt kits listed will not work. Parts without fitment are to be assumed universal and may require vehicle modification.

Compatibility: Years: Make: model: Application: Notes: 1998 - 2002 KawasakiJS750 SXI Pro, 1997 1998 Pro 785, 1995 1996 780, 1996 1997 Polaris SL 1994 Sea-Dioxin, 1996 KawasakiJS750 750SXi, 2003 2011 KawasakiJS800 800 SX-R, 1993 1995 Polaris SL 750These model's have an external fuel pump, the pump components in rebuilt kits listed will not work.: Brand: Mikuni, model Number: 25560-M363640-90. I need to exchange an item.

part #: 25560m36364090 price

• $88.50

specifications jetskiintakeez:

• for models: Gts
• for makes: Sea-doo
• for years: 1992-2001
• brand: Mikuni
• mpn: 25560-m363640-90
• part type: Jet

returns jetskiintakeez:

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

payments jetskiintakeez:

• other
• credit card: Diners-club
• wallet: Google-pay

offer jetskiintakeez:

• quantity: 9
• availability: In Stock
• options: Ship-to-home
• started: February 1, 2026
• sold: 0

seller jetskiintakeez:

• # reviews: 76624
• rating: 99.8%
• city: San Marcos, CA

general jetskiintakeez:

• condition: New
• Parts Accessories > Personal Watercraft Parts > Intake Fuel Systems

shipping jetskiintakeez:

• transit: 3-6 Days
• cost: $0.00
• class: Standard
• service: Standard
• type: Fixed

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