WISECO ORWI-CO423519-ON Pro Lite Piston Bike 68.5MM

( Brand: Wiseco ), ( Manufacturer Part Number: ORWI-CO423519-ON ), ( Part Type: Piston )

Review WISECO Yamaha Dirt Bike Pro lite Piston 68.5mm fits WR250 1988–1991

Introducing the WiseCo ORWI-CO423519-ON Pro-Lite Piston, specifically designed for Yamaha WR250 motorcycles manufactured between 1988 and 1991. This high-performance piston is an excellent upgrade for riders seeking increased power and improved engine efficiency.

The Pro-Lite Piston boasts a 68.5mm bore size, which is slightly larger than the original factory piston. This enlargement allows for more fuel and air to enter the engine, resulting in increased combustion and, ultimately, more horsepower. However, it is essential to note that installing this larger piston requires matching engine modifications, such as a new cylinder and crankshaft, to ensure proper clearance and optimal engine performance.

Manufactured using top-grade aluminum alloy, this piston ensures excellent heat dissipation and durability. The piston's crown features a state-of-the-art design with a dish shape and a compression height optimized for the 1988-1991 Yamaha WR250 engine. The piston's skirt is designed to minimize friction with the cylinder wall for reduced engine wear.

The piston ring package includes a compression ring, two oil control rings, and a top ring. Each ring is meticulously crafted from high-tensile steel to ensure a snug fit and maximum sealing efficiency. The piston ring grooves are precision machined to guarantee a proper fit and even ring gap.

The Pro-Lite Piston also comes with a piston pin and piston pin retaining clip, ensuring a secure and reliable fit. Additionally, the piston's design includes a balanced piston crown to minimize vibrations, contributing to smoother engine operation.

In conclusion, the WiseCo ORWI-CO423519-ON Pro-Lite Piston is an excellent upgrade for riders of the 1988-1991 Yamaha WR250 motorcycles seeking increased power and improved engine efficiency. This high-quality piston is meticulously crafted using top-grade materials and features a design optimized for the WR250 engine. However, it is crucial to follow the proper installation procedures and engine modifications to ensure optimal performance and longevity.

The Wiseco WI-CO423519-ON Pro-Lite piston for the 1988-1991 Yamaha WR250 bike is a performance upgrade option for those seeking increased power and improved engine response. Let's examine the potential advantages and disadvantages of investing in this aftermarket part.

1. Enhanced Power: The Pro-Lite piston is designed to provide better compression and increased power output. This can result in improved acceleration and overall performance.

2. Lightweight: The piston is lighter than the stock piston, contributing to reduced engine weight and potentially improved handling.

3. Durability: Wiseco is known for its high-quality piston designs and materials, which can lead to longer engine life and improved reliability.

1. Cost: The Wiseco Pro-Lite piston is a more expensive option compared to the stock piston. This may be a deterrent for some riders, especially those on a budget.

2. Installation: Installing the new piston requires engine disassembly and reassembly, which can be time-consuming and labor-intensive.

3. Customization: This piston is designed specifically for the 68.5mm WR250 engine. If you plan to sell the bike or switch to a different model in the future, this modification may limit your options.

In conclusion, the Wiseco Pro-Lite piston for the 1988-1991 Yamaha WR250 bike offers potential performance gains and improved durability. However, it comes with higher cost, installation challenges, and potential limitations for future customization. Ultimately, the decision to invest in this aftermarket part depends on your riding goals, budget, and long-term plans for the bike.

If you value increased power, better handling, and are committed to the investment and customization, the Wiseco Pro-Lite piston could be an excellent choice for your WR250. Otherwise, you may want to consider other options or hold off on this modification for now.

Details:

All Wiseco 2 cycle pistons are supplied with rings and cir clips. All Wiseco 4 cycle pistons come complete with rings, wrist pins and cir clips. Wiseco 2 cycle pistons are not supplied with a wrist pin unless noted in the. Credit or Debit Card.

This is helpful if you are buying multiple items. Parts without fitment are to be assumed universal and may require vehicle modification. I need to exchange an item. 1988 - 1991 Yamaha WR250 Dirt Bike Wiseco Pro-Lite Piston 68.5mm: Compatibility: WR250, Notes: Power Valve must be modified for .040 and larger, 1991 model is Ceramic - Composite, Size: 68.5mm.

Only Wiseco replacement ring sets can be used on pistons.

part #: orwico423519 price

• $197.99

specifications pistondon:

• for models: Wr250
• for makes: Yamaha
• for years: 1988-1991
• brand: Wiseco
• mpn: Orwi-co423519-on
• part type: Piston

returns pistondon:

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

shipping pistondon:

• type: Fixed
• service: Standard
• cost: $0.00
• transit: 2-6 Days
• class: Standard

general pistondon:

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

payments pistondon:

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

seller pistondon:

• # reviews: 69906
• rating: 99.7%
• city: Sparks, NV

offer pistondon:

• availability: In Stock
• sold: 0
• started: November 13, 2025
• options: Ship-to-home
• quantity: 4

Wiseco ORWI-CO423519 Is Similar To:

• Honda 12100-ml3-870 1988 Cr500 Cr 500 Cylinder Jug Wiseco Piston Top End Gaskets (17.6% 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 (46.2% 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 (28.4% 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 (45.1% 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 (29.4% 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 (33.1% 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 (32.7% 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 (33.8% 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 (42.2% 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 (35.6% 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 (42.3% 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)