Custom Motorcycle Pistons & Piston Rings Manufacturer
We carry a comprehensive inventory of aluminum pistons and offer custom forging services. By combining lightweight, high-strength, precision machining and premium materials, we create pistons you can trust to deliver high horsepower, torque and reliability. As a leading piston manufacturer and supplier, our OEM products have been widely used in well-known brands such as Harley-Davidson, Honda, Kawasaki, Suzuki and Yamaha. We also offer personalized custom design and manufacturing services to meet a variety of unique needs.
All MPM motorcycle pistons are precision forged from top-grade 2618 billet bar stock, and then undergo a carefully designed heat treatment and aging process to reach T61 (2618-T61) condition. This specialty material is the first choice of many top racing piston manufacturers when seeking ultimate fatigue resistance and durability. It is worth mentioning that the silicon particle content of 2618-T61 is strictly controlled below 1% to ensure the excellent performance of the piston.
In contrast, high silicon content pistons (usually forged from 4032 material) tend not to withstand the most extreme stresses that racing pistons are required to endure. The unique feature of 2618-T61 is that it can maintain a stable shape even in extreme pressure and high-speed environments, avoiding the common problem of “skirt shrinkage”. When you choose an MPM piston, you choose a long-lasting, high-performance piston solution.
The Brands We Serve
MPM offers a wide range of forged pistons and connecting rods as well as engine accessories for different applications such as etc..
Pistons For Harley Davidson Motorcycles
• Sportster: 1972-1985 (1000cc)
• Sportster: 1986-UP (Big Bore Kit for Evolution 883 – XLH Model)
• Sportster: 1988-UP (EVO 1200)
• Pan Head: 1948-1980 (74 ci Big Twin 1200)
• Shovel Head: 1948-1980 (74 ci Big Twin 1200)
• Shovel Head: 1978-1984 (80 ci Big Twin 1340)
• Evolution: 1984-UP (80 ci Big Twin 1340)
• EVO V Twin (Hot Street Design – Stock Bore Size)
• 95″ Twin Cam (Hot Street Design – Stock Bore Size)
Pistons For Honda Motorcycles
• XR400: 1996-Up
• ES 400: 1998-Up
• XR250R: 1986-Up Off-Road
• XR250L: 1991-1996 Off-Road
• CBR 1100xx: Blackbird
• CBR 6200: F2 AND F3 FOUR CYLINDER 1991-1998
Pistons For KAWASAKI Motorcycles
• KZ1000 (EXCEPT J MODEL)
• ZX 11 (1990-UP)
Pistons For SUZUKI Motorcycles
• Pro Mod Drag Racing: Heavy Nitrous
• GSXR 1100
• GSXR 1100W
• GSX 1300R HAYABUSA
Pistons For YAMAHA Motorcycles
• V-Max 1200
• 1250 FJ 1200
MPM Profession Forged Pistons Manufacturing Process
Casting
The MPM team designed and completed the final design by analyzing the complexity of the structural shape of the forged piston and forged connecting rod, small draft angle, dimensional accuracy, thin skirt characteristics, and post-processing points.
Mold
MPM prefers 4032 aluminum alloy for its pistons, which is not easily broken and significantly increases engine reliability and durability. Tolerance control is more precise, achieving a piston bore fit closer to the design value, reducing the risk of oil leakage and wear.
Casting
MPM has its own forging mold production workshop and is well versed in mold material selection and heat treatment requirements. It can optimize mold design, such as adding vents and ejection holes in the mold cavity, and setting up annular resistance grooves on the mold. The flash bridge of the forging die, etc., and finally the precision forging die is completed.
Heat Treatment
MPM has an independent heat treatment workshop, which gives us an in-depth understanding of heat treatment requirements and superb control technology. Through heat treatment, we are able to optimize the mechanical properties of the material, ensuring that pistons and connecting rods perform well in a variety of operating environments.
CNC
MPM has an experienced production team and uses advanced equipment, including new CNC machine tools, CMM measuring machines, FEA analysis software and Cadcam systems, to realize CNC machining of forged pistons and forged connecting rods. It ensures that the dimensional accuracy of the product reaches ±0.01C and the weight control is accurate to ±1 gram.
Plating
During the production process of forged pistons and forged connecting rods, MPM performs meticulous processing on various parts to ensure optimal performance of the pistons and connecting rods.
Checking
MPM inspects each forged piston and forged connecting rod, and only packages them if they meet the requirements. Inspection items include piston diameter, skirt specific points, piston pin outer diameter, piston pin and piston pin hole clearance, piston ring diameter, etc. The opening clearance and side clearance of the piston ring.
Delivery
MPM cooperates with different logistics and express delivery companies to deliver each package quickly and on time. Whether you are in remote Africa or North America, you can receive your forged pistons and forged connecting rods safely and promptly.
FAQ About Motorcycle Pistons & Piston Rings
In a motorcycle, the piston rings are components that are fitted around the outer diameter of the piston. They are responsible for creating a seal between the piston and the cylinder wall. The main functions of piston rings in a motorcycle engine include:
1. Sealing: The piston rings help to seal the combustion chamber, preventing the escape of gases and ensuring efficient compression and combustion within the cylinder.
2. Lubrication: The piston rings also help to regulate the distribution of oil on the cylinder wall, ensuring proper lubrication of the moving parts and reducing friction.
3. Heat transfer: The piston rings aid in transferring heat away from the piston and into the cylinder wall, helping to regulate engine temperature and prevent overheating.
Overall, piston rings play a crucial role in the proper functioning of a motorcycle engine by maintaining compression, reducing friction, and ensuring efficient combustion.
Checking the piston rings in a motorcycle engine typically requires disassembling the engine, as the piston rings are located inside the cylinder. Here are the general steps to check the piston rings in a motorcycle:
1. Remove the engine: Disconnect the motorcycle’s battery, drain the oil, and remove the engine from the frame.
2. Disassemble the top end: Remove the cylinder head and cylinder from the engine to access the piston and rings.
3. Inspect the piston rings: Carefully remove the piston from the cylinder and inspect the piston rings for signs of wear, damage, or carbon buildup. Check for gaps in the rings or signs of excessive wear.
4. Check ring end gap: Measure the end gap of each piston ring using a feeler gauge. The ring end gap should be within the manufacturer’s specified limits. If the gap is too large, the rings may need to be replaced.
5. Check ring-to-groove clearance: Measure the clearance between the piston ring and the ring groove in the piston. Excessive clearance can lead to oil consumption and reduced compression.
6. Compression test: Perform a compression test to check the overall condition of the piston rings and cylinder. Low compression may indicate worn or damaged rings.
7. Reassemble the engine: If the piston rings are worn or damaged, they should be replaced. Reassemble the engine with new rings and gaskets, ensuring everything is properly torqued and aligned.
It is recommended to consult the motorcycle’s service manual for specific instructions on checking and replacing piston rings, as the process can vary depending on the make and model of the motorcycle. If you are not experienced in engine work, it is best to have a professional mechanic perform the inspection and any necessary repairs.
Yes, piston rings typically have markings on them to indicate their orientation and position when installed in the engine. These markings help ensure that the rings are installed correctly for optimal performance and sealing. The markings on piston rings may include:
1. Top ring marking: The top compression ring usually has a marking, such as a dot or a letter, to indicate the top side of the ring. This marking should face upward when the ring is installed in the cylinder.
2. Second ring marking: The second compression ring may also have a marking to indicate its orientation. This ring is usually installed below the top compression ring.
3. Oil control ring markings: Oil control rings, which help regulate oil consumption and lubrication, may have markings to indicate their position and orientation.
It is important to follow the manufacturer’s guidelines and service manual when installing piston rings to ensure they are oriented correctly. Installing piston rings with the markings facing the wrong way can lead to poor sealing, increased oil consumption, and reduced engine performance.
The rings on a piston are called piston rings. Piston rings are circular metal rings that are fitted around the outer diameter of the piston. They are essential components in an internal combustion engine and serve several important functions, including sealing the combustion chamber, regulating oil consumption, and aiding in heat transfer. Typically, a piston in a motorcycle engine will have multiple rings, including compression rings and oil control rings. These rings work together to ensure proper engine performance and efficiency.
Pistons are typically stamped or marked with identification numbers, codes, or logos on the crown or top surface of the piston. These markings are used for identification, quality control, and tracking purposes. The specific location of the stamping on a piston can vary depending on the manufacturer and the design of the piston. In general, you may find stampings on the top surface of the piston near the edge or on the side of the piston skirt. The markings may include information such as the manufacturer’s logo, part number, size, or other relevant details. If you need to identify or reference a piston, looking for the stamping on the crown or skirt of the piston can help provide important information about the piston’s specifications and origin.
Identifying pistons can be done by examining various features and markings on the piston itself. Here are some common methods to help identify pistons:
1. Manufacturer’s logo or name: Many pistons have the manufacturer’s logo or name stamped or engraved on the piston. This can help identify the brand of the piston.
2. Part number: Pistons often have a part number stamped on them, which can be used to identify the specific model and size of the piston.
3. Size markings: Pistons may have size markings that indicate the diameter, bore size, or oversize measurements of the piston. These markings can help determine the correct replacement piston if needed.
4. Material: Different pistons are made from various materials such as cast aluminum, forged aluminum, or other alloys. Identifying the material can provide some clues about the type of piston.
5. Design features: Some pistons have unique design features, such as valve reliefs, skirt profiles, or coatings, that can help differentiate them from other pistons.
6. Compression height: The compression height of a piston (distance from the center of the wrist pin bore to the top of the piston) is a critical measurement that can help identify the correct piston for an engine.
7. Piston rings and grooves: The number and configuration of piston rings and ring grooves can also help identify the type of piston.
If you are unsure about the identification of a piston, it is recommended to consult the manufacturer’s documentation, service manual, or a qualified mechanic to ensure you have the correct information for your specific application.
