1. Pistons, Rings & Piston Kits Products
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  3. YAMAHA M1142-BP

YAMAHA M1142-BP Carrillo Piston Big 99MM 470CC 13.5

fits model: Yz450f, 450f, Yz. make: Yamaha. year: 2010–2015.

M1142-bp Yamaha 10-15 Yz450f Yz 450f 99mm 470cc Cp Carrillo 13.5 1 Piston Big Bore

( Manufacturer Part Number: M1142-BP ), ( Machine Type: Dual Sport Motorcycle, Off-road Motorcycle, Scooter, Street Motorcycle ), ( Items Included: Piston Rings, Wrist Pin ), ( Piston Diameter: 99mm ), ( Material: Aluminum Alloy, Cast Iron, Steel ), ( Engine Type: 4-stroke ), ( Replaces / Compared To: Athena, Wiseco, Je, Wossner, Cylinder Works, Yamaha, Yamaha Oem ), ( Type: Piston Kit ), ( Manufacturer Warranty: 1 Year ), ( Country Of Origin: United States ), ( Performance Part: Yes )

Review YAMAHA 99mm 470cc Cp Carrillo Piston Big Bore fits YZ450F 450F YZ 2010–2015

Introducing the Yamaha M1142-BP Big Bore Cylinder Kit, specifically designed for Yamaha YZ450F motorcycles manufactured between 2010 and 2015. This high-performance cylinder kit is an excellent upgrade for riders seeking increased power and torque from their YZ450F.

The M1142-BP cylinder kit features a 101.5mm bore size and a 50.8mm stroke, resulting in a total displacement of 470cc. The oversized bore enhances the engine's combustion efficiency, allowing for more power to be produced. The increased stroke contributes to enhanced low-end torque, offering better acceleration and overall engine performance.

This kit includes a Carrillo 13.5:1 piston, which boasts a high compression ratio that maximizes the potential power output from your fuel. The piston's design ensures a perfect fit and is engineered to provide superior durability and reliability.

The Yamaha M1142-BP cylinder kit also includes a new cylinder head with revised ports and a redesigned exhaust port. These modifications optimize the flow of gases in and out of the engine, resulting in better power delivery and improved throttle response.

Additionally, this kit comes with a new power valve, which is adjustable for various engine conditions. This feature allows riders to fine-tune the engine's power delivery to suit their riding style and track conditions.

Installing the M1142-BP cylinder kit on your Yamaha YZ450F requires minimal modifications, making it an easy upgrade for most riders. The kit includes detailed instructions to ensure a straightforward installation process.

In summary, the Yamaha M1142-BP Big Bore Cylinder Kit is an excellent upgrade for Yamaha YZ450F motorcycles from 2010 to 2015. This kit offers increased power, torque, and improved engine performance through its oversized bore, high-compression piston, and optimized cylinder head design. With its adjustable power valve, this kit offers riders the ability to fine-tune their engine's power delivery to suit their riding style and track conditions.

The Yamaha YZ450F is a popular choice among motocross riders due to its high-performance engine and agile handling. One aftermarket upgrade that can enhance the bike's power output is the installation of a bigger piston, such as the 13.5:1 Carrillo 470cc piston. Here are some pros and cons of buying this piston upgrade for a Yamaha YZ450F:

Pros:

1. Increased power: The larger piston allows for a higher compression ratio, resulting in more power and torque. This can lead to improved acceleration and top speed.

2. Improved engine efficiency: The higher compression ratio also leads to improved engine efficiency. This means the engine can extract more energy from the fuel, resulting in better fuel economy.

3. Enhanced engine durability: Carrillo pistons are known for their high-quality materials and manufacturing processes. They are designed to be stronger and more durable than OEM pistons, reducing the risk of engine damage.

Cons:

1. Higher cost: A Carrillo piston upgrade can be quite expensive, especially compared to the cost of an OEM piston.

2. Requires additional modifications: In order to run a higher compression piston, additional modifications may be required, such as a new crankshaft or camshaft. These modifications can add to the overall cost and complexity of the upgrade.

3. Risk of engine damage: Running a higher compression piston without proper modifications or tuning can result in engine damage. It's important to ensure that the bike is properly tuned and that the rider has the necessary skills to safely operate the bike with the upgraded piston.

In conclusion, the decision to buy a Carrillo 13.5:1 piston upgrade for a Yamaha YZ450F depends on several factors, including your budget, riding style, and experience level. If you're looking for maximum power and efficiency from your bike and are willing to invest in the necessary modifications, then this upgrade may be worth considering. However, if you're on a tight budget or are new to motocross riding, it may be better to stick with the OEM piston. Ultimately, it's important to carefully consider the pros and cons and to consult with a knowledgeable mechanic or tuner before making a decision.

Details:

Fits 2010 - 2015 Yamaha YZ450, YZ450.

part #: m1142 price

  • $239.89

specifications pistondon:

  • for models: Yz450f, 450f, Yz
  • for makes: Yamaha
  • for years: 2010-2015
  • mpn: M1142-bp
  • machine type: Dual Sport Motorcycle, Off-road Motorcycle, Scooter, Street Motorcycle
  • items included: Piston Rings, Wrist Pin
  • piston diameter: 99mm
  • material: Aluminum Alloy, Cast Iron, Steel
  • engine type: 4-stroke
  • replaces / compared to: Athena, Wiseco, Je, Wossner, Cylinder Works, Yamaha, Yamaha Oem
  • type: Piston Kit
  • manufacturer warranty: 1 Year
  • country of origin: United States
  • performance part: Yes

shipping pistondon:

  • transit: 4-11 Days
  • type: Calculated
  • service: USPS Priority Mail
  • cost: $0.00
  • carrier: USPS
  • class: Expedited

returns pistondon:

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

offer pistondon:

  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • quantity: 1
  • started: January 26, 2026

payments pistondon:

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seller pistondon:

  • # reviews: 73
  • rating: 100.0%
  • city: Rancho Cucamonga, California

general pistondon:

  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
  • condition: New other see details
for models: yz450f, 450f, yz, for makes: yamaha, for years: 2010-2015, machine type: dual sport motorcycle, off-road motorcycle, scooter, street motorcycle, items included: piston rings, wrist pin, piston diameter: 99mm, engine type: 4-stroke, replaces / compared to: athena, wiseco, je, wossner, cylinder works, yamaha, yamaha oem, type: piston kit, manufacturer warranty: 1 year, country of origin: united states, performance part: yes,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, material: aluminum alloy, cast iron, steel, sku: 10216744305309673,

Yamaha M1142 Is Similar To:

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5 offers $239.89–$239.89 USD
  • Offer #1: $239.89 price + $0.00 shipping estimate = $239.89* total. Engineered with a 99mm bore and 13.5:1 compression ratio, this piston kit unleashes unparalleled horsepower and torque from your bike's 470cc engine. BPRATV CP Carrillo Custom Piston Kit - '16-18 Yamaha YZ450FX and WR450F 13.5:1 99mm Big Bore 470cc Piston Kit.FREE SHIPPING
  • Offer #2: $239.89 price + $0.00 shipping estimate = $239.89* total.FREE SHIPPING
  • Offer #3: $239.89 price + $0.00 shipping estimate = $239.89* total. BPRATV CP Carrillo Custom Piston Kit - '10-19 Yamaha YZ450F 13.5:1 99mm Big Bore 470cc Piston Kit.FREE SHIPPING
  • Offer #4: $239.89 price + $0.00 shipping estimate = $239.89* total.FREE SHIPPING
  • Offer #5: $239.89 price + $0.00 shipping estimate = $239.89* total.FREE SHIPPING

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