WISECO ORWI-CO423671-ON Piston Bike 69MM

( Brand: Wiseco ), ( Manufacturer Part Number: ORWI-CO423671-ON ), ( Part Type: Piston )

Review WISECO Yamaha Dirt Bike Piston 69mm fits YZ250 1983–1987

The WISCO ORWI-CO423671-ON piston is a high-performance replacement option for the 1983-1987 Yamaha YZ250 motorcycle. This piston is specifically designed for engines with a bore size of 69mm.

The piston is crafted from a forged material, ensuring superior durability and reliability. The forged construction allows the piston to withstand the high compression and heat loads generated during engine operation. This is essential for maintaining optimal engine performance and extending the life of the engine.

The piston features a compact design with a flat top to accommodate various types of motorcycle racing engines. The piston skirt is optimally designed for a snug fit in the cylinder bore to minimize frictional losses and ensure efficient power transfer.

The piston ring grooves are designed to accommodate standard piston rings. The grooves are precision machined to ensure proper ring fit and sealing. The piston ring grooves are also chamfered to facilitate easy ring installation and removal.

The piston crown is designed with a dome shape to optimize combustion efficiency and power output. The crown is also finished with a smooth surface to minimize friction and wear.

The piston is designed to work with standard connecting rods and crankshafts. The piston pin bore is accurately machined to ensure proper fit and alignment with the connecting rod small end.

The piston is also designed with cooling fins to help dissipate heat generated during engine operation. The cooling fins are strategically placed to maximize airflow and promote efficient cooling.

Overall, the WISCO ORWI-CO423671-ON piston is a high-quality replacement option for the 1983-1987 Yamaha YZ250 motorcycle. Its forged construction, compact design, and cooling fins make it an ideal choice for racers and enthusiasts looking to maximize engine performance and longevity.

Wiseco WI-CO423671-ON 1983-1987 Yamaha YZ250 Bike Piston: A Detailed Analysis

The Wiseco WI-CO423671-ON piston, designed for 1983-1987 Yamaha YZ250 bikes, is a popular aftermarket upgrade. This analysis aims to provide you with the pros and cons of investing in this piston, followed by an Recommendation.

1. Enhanced Performance: The Wiseco piston is known for its improved power delivery and increased horsepower due to its lighter weight and stronger design.

2. Durability: The piston is made from high-quality materials, ensuring longer engine life and better resistance to engine heat and pressure.

3. Customizability: Wiseco offers various piston designs to cater to different riding styles and power requirements, allowing riders to fine-tune their engine for their specific needs.

4. Improved Ring Seals: The piston's improved ring seals help prevent oil consumption and minimize blow-by, contributing to better engine efficiency.

1. Cost: The Wiseco piston is generally more expensive than stock pistons, making it a significant investment for some riders.

2. Installation Complexity: Installing the Wiseco piston can be more challenging than installing a stock piston due to the precision required and the need for specialized tools.

3. Potential Clearance Issues: In some cases, the Wiseco piston may not fit perfectly in the engine without modifications, necessitating additional work and expense.

The Wiseco WI-CO423671-ON piston for 1983-1987 Yamaha YZ250 bikes offers substantial performance improvements, enhanced durability, and customizability. However, it comes with a higher cost, installation complexity, and potential clearance issues. Ultimately, the decision to purchase this piston depends on your budget, technical expertise, and desired performance gains.

If you are a serious racer or a performance enthusiast with a good mechanical background, the Wiseco piston is an excellent investment for improved engine power and efficiency. However, if you are a casual rider or have limited mechanical experience, it might be more practical to stick with the stock piston to save on costs and installation complexity.

Details:

All Wiseco 2 cycle pistons are supplied with rings and cir clips. Only Wiseco replacement ring sets can be used on pistons. Credit or Debit Card. This is helpful if you are buying multiple items.

All Wiseco 4 cycle pistons come complete with rings, wrist pins and cir clips. 1983 1987 Yamaha YZ250 Dirt Bike Wiseco Piston 69mm: Compatibility: YZ250, Notes: Power Valve must be modified for .040 and larger. I need to exchange an item. Piston Size: 69mm.

Parts without fitment are to be assumed universal and may require vehicle modification.

part #: orwico423671 price

• $197.99

specifications pistondon:

• for models: Yz250
• for makes: Yamaha
• for years: 1983-1987
• brand: Wiseco
• mpn: Orwi-co423671-on
• part type: Piston

general pistondon:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
• condition: New

returns pistondon:

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

offer pistondon:

• started: March 18, 2026
• options: Ship-to-home
• quantity: 5
• sold: 0
• availability: In Stock

shipping pistondon:

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

payments pistondon:

• other
• credit card: Discover
• wallet: Google-pay

seller pistondon:

• # reviews: 80387
• rating: 99.9%
• city: Indiana, US

Wiseco ORWI-CO423671 Is Similar To:

• Honda 12100-ml3-870 1988 Cr500 Cr 500 Cylinder Jug Wiseco Piston Top End Gaskets (18.9% similar) New Wiseco piston kit complete with rings, wrist pin and cir-clips. New top end gaskets kit. 1988 Honda CR500 cylinder jug Wiseco piston top end gaskets, kit includes-, factory oem cylinder bored to new piston. Ready to install kit...(May 19th, 2024)
• Wiseco 2165cd 1985 85 Honda Cr125r Cr 125r 125 Piston Rings 55mm (45.5% similar) For sale is the piston rings 55MM that was removed from a 1985 Honda CR125R. The condition of this item is displayed in the pictures above. I do my best to describe the condition of parts in and pictures...(May 21st, 2024)
• Wiseco 4393p2 Piston And Rings Honda Atc Trx 350 85-89 43934p2 4393m0 (32.1% similar) The set includes Wiseco renowned 4393P2 model piston and rings, ensuring that your engine runs smoothly efficiently. Otherwise the piston and rings are almost like new. This Wiseco piston and ring set is an excellent choice for Honda ACT TRX 350 model's manufactured between 1985 1989 ...(May 24th, 2024)
• Wiseco 645m04750 Like New Pro-lite Piston Stock 47.5mm Bore For Suzuki Rm80 1991-2001 (32.7% similar) 2 wrist pin cir clips. This Wiseco kit contains the needed components to replace one piston. Wiseco individual piston kit. Includes: 1 Wiseco piston. Wiseco participates in nearly every form of racing including supergrass, motocross, GCC, orcs, moot GP, super bike, NRA pro stock...(May 30th, 2024)
• Wiseco 40144m07800 Piston Kit Standard 78 Mm 40144m07800 (30.4% similar) Wiseco piston kit standard 78MM 40144M078 gas / Husqvarna KTM see below for compatible machines, kit is in good condition. Pictures show most significant blemishes but not every blemish. See pictures for details fully functional no bends cracks or defects. Piston kit includes piston...(June 1st, 2024)
• Wiseco 40082m09600 Piston Kit Standard Bore 95.95mm 12.5 1 Compression (32.9% similar) Used piston has about 4 hours on it. Good condition with wrist pin and cir clips rings...(June 10th, 2024)
• Wiseco 806m04800 Like New Piston Kit Pro-lite For Husqvarna Kawasaki Suzuki And Yamaha (29.9% similar) Now you can own the same race parts as all top teams. Service intervals may be increased with racers choice pistons over conventional Wiseco pistons, and are for expert racers tuners only. Cylinder sleeves must be purchased separately. When blow-by starts to increase on other pistons and power...(June 12th, 2024)
• Wiseco Pk1237 Motorcycle Piston Kit With Top-end Gasket (35.2% similar) Please review the pictures above carefully. Nothing else comes with this offer. Manufacturer - Wiseco, part number PK1237. Fits 04-05 Kawasaki KX250F, 04-06 Suzuki RMZ250. There is minor grease throughout and some parts have already been assembled. Missing: please see...(June 27th, 2024)
• Wiseco 526m06700 Honda Cr250 Atc250 Trx250 Piston (46.2% similar) Parts are listed for the year and model stated. See pictures. Item: Honda CR250 ATC250 TRX250 piston 526M067 condition: in very good condition...(June 28th, 2024)
• Wiseco 4875m05350 Top End Piston For Kawasaki Klx 110 02-12 53.50mm (37% similar) Wiseco top end piston for Kawasaki JLX 110 02-12 53.50MM 4875M05350...(July 2nd, 2024)
• Wiseco 822m05400 Like New Pro Lite Piston Kit 54.00mm For Kawasaki Kx125 2003 (34.5% similar) Compression ratio: standard. Bore size: 54MM. Piston kit includes piston, rings, wrist pin and cir clips. Fits the following model's: Kawasaki KX125 2003 . Lightweight forging for instant throttle response and maximum torque. Specs: oversize: standard. Computer engineered piston skirt...(July 10th, 2024)