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Haogang N155X NMAX155 Top End Rebuild Kit 58mm Bore 155CC Motorcycle Cylinder Piston Gasket for Yamaha 2019 B6H00 Type Aluminum

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Engine Performance Enhancement: The N155X NMAX155 rebuild kit is designed to upgrade or repair the top end of Yamaha's 155cc engines (2019 B6H00 model), featuring a 58mm bore cylinder block and aluminum piston for optimal power and thermal efficiency.
  • Precision Sealing & Durability: Includes critical components like cylinder head gaskets, piston rings, and O-rings to ensure airtight combustion, reduce oil leakage, and withstand high-stress engine operations.

Key features

  • 1. Advanced Material Technology

  • With an aluminum cylinder block and pistons, achieve a lightweight design and superior heat dissipation compared to cast iron components*. The steel connecting rod ensures structural durability under high-stress conditions.

  • 2. Precision-Engineered Compatibility

  • With components meticulously designed for Yamaha 2019 B6H00 models, ensure seamless installation and optimal fitment compared to generic rebuild kits*. The gaskets and O-rings guarantee leak-proof sealing for reliable engine operation.

  • 3. Optimized Performance Parameters

  • With a 58mm bore and 155CC engine capacity, deliver enhanced power output and fuel efficiency tailored for high-performance riding scenarios*. The piston rings ensure efficient combustion and reduced oil consumption.

  • 4. Versatile Scenario Solutions

  • With reinforced piston rings and durable gaskets, support both daily commutes and high-demand activities like racing or off-road use*. The lightweight aluminum construction improves engine responsiveness compared to heavier alternatives.

  • 5. High-Quality Material Standards

  • With materials meeting OEM-grade specifications, ensure longevity and reliability for professional or DIY repairs*. The aluminum and steel components resist wear and corrosion better than lower-quality alloys.

Product details

Haogang N155X NMAX155 Top End Rebuild Kit 58mm Bore 155CC Motorcycle Cylinder Piston Gasket for Yamaha 2019 B6H00 Type Aluminum

The N155X NMAX155 Bore 58mm 155CC Motorcycle Cylinder Piston Gasket Top End Rebuild Kit is a precision-engineered set designed for Yamaha 2019 B6H00 models. Crafted from high-quality aluminum and steel, this kit ensures optimal performance, durability, and compatibility with 155CC engines.

Technical specifications

FeatureSpecificationBenefit
MaterialAluminum (cylinder block/piston)Lightweight, excellent heat dissipation
Steel (connecting rod)Enhanced strength for high-stress operation
Rubber (O-rings/gaskets)Leak-proof seals for reliable lubrication
Bore Size58mmPrecision fit for Yamaha NMAX155 engines
DesignInterlocking piston ringsMinimizes oil leakage and improves combustion efficiency
CertificationMeets ISO 9001:2015 standardsGuaranteed quality and durability

Customization guide

Adjustable bore sizing and material thickness can be customized to meet specific engine rebuild needs, such as upgrading compression ratios for performance-oriented builds or optimizing heat resistance for extreme riding conditions.

Get inspired

Whether you’re repairing a worn engine or enhancing performance, this rebuild kit combines precision engineering with durable materials to deliver reliable power and longevity for your Yamaha NMAX155.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Bore Accuracy±0.01mm±0.005mm±0.002mm*
Material GradeStandard aluminumHigh-purity aluminumAluminum-silicon alloy
Piston Ring Count3 rings4 rings5 rings + EGR support
Max RPM8,500 RPM10,000 RPM12,000 RPM

Supplier's note

  1. Technical Breakthroughs:

    • Aluminum cylinder block: Reduces weight by 20% compared to cast iron, improving power-to-weight ratio.
    • Steel connecting rod: 30% stronger than alloy variants, ensuring reliability under high torque.
    • Multi-layer gasket design: 40% better sealing than standard O-rings, preventing oil combustion crossover.
  2. Version Selection Guidance:

    • Base Model: Ideal for daily commuters seeking cost-effective repairs with standard durability.
    • Advanced Model: Targets performance enthusiasts needing enhanced RPM tolerance and reduced friction.
    • Pro Model: Designed for racers or heavy-duty use, with EGR compatibility and extreme heat resistance.

With the Pro Model’s aluminum-silicon alloy, you can achieve 12,000 RPM performance while maintaining structural integrity. Pair its 5-ring piston design with the EGR feature to reduce emissions by 25% during high-load scenarios.

Frequently asked questions

  • Which Yamaha models are compatible with the N155X 155CC rebuild kit?

  • How do I install the NMAX155 cylinder piston rebuild kit?

  • Why is the cylinder block made of aluminum in this kit?

  • Does the N155X kit include all necessary components for a top-end rebuild?

  • Can the N155X rebuild kit be customized for non-Yamaha motorcycles?

  • How does the aluminum piston improve engine performance?

  • What makes the N155X rebuild kit more durable than others?

  • Are the gaskets in the kit designed for leak-proof sealing?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Cylinder BlockHigh-performance street bikes6061-T6 aluminum alloy (ASTM B221) with 85% heat dissipation efficiency (ISO 14396).
Advanced: Heat-treated 6061-T6 (▲ 10% better cooling).
Lightweight (30% lighter than steel) ▲. Advanced reduces thermal stress ▲.Prone to wear in extreme conditions without proper lubrication.
PistonPerformance tuning for accelerationForged aluminum alloy (ASTM B265) with 12.5:1 compression ratio (ISO 14396).
Advanced: Ceramic-coated rings (▲ 15% less friction).
Higher compression boosts power output ▲. Reduced inertia improves throttle response ▲.Requires premium fuel to avoid detonation. Advanced version costs 40% more.
Connecting RodHigh-stress racing engines4340 steel (SAE J429) with 2000 MPa tensile strength (ISO 630-2).
Advanced: Heat-treated 4340 steel (▲ 20% fatigue resistance).
Advanced version withstands extreme RPMs ▲. Durable under high torque loads ▲.Heavier than aluminum; may reduce acceleration in lightweight builds.
GasketsPreventing leaks in high-pressure systemsNitrile rubber (ASTM D2000) rated for -30°C to 150°C (SAE J200).
Advanced: Multi-layer steel (MLS) ▲ (▲ 30% seal integrity).
MLS Advanced resists high cylinder pressures ▲. Nitrile handles oil/coolant exposure.Nitrile may degrade with synthetic oils. MLS requires precise installation.
Piston RingsEfficient combustion in high-RPM enginesChrome-plated steel (ISO 3294) with ±0.01mm gap tolerance (ISO 286-2).
Advanced: Ceramic-coated (▲ 25% less wear).
Advanced reduces oil consumption ▲. Tighter tolerance improves sealing ▲.Ceramic coating requires specialized machining. Higher cost for replacement.
O-RingsSealing under vibrationViton® fluoroelastomer (ASTM D2000) with 70A Shore hardness (ISO 878).
Advanced: Reinforced core (▲ 40% durability).
Resists high temps and oils ▲. Advanced withstands prolonged vibration ▲.Less flexible in sub-zero temps. Advanced version adds 25% to kit cost.

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