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All products have accurate in stock quantities listed, if it shows in stock it’s actually in stock!
Free Shipping on orders over $69.99 to the continental 48 (Alaska & Hawaii orders, call 402-214-0706 to order).
All products have accurate in stock quantities listed, if it shows in stock it’s actually in stock!
Wiseco

Wiseco Pro-Lite Piston Kit - 559M05700 Yamaha YZ 125 1986-1988

MPN: 559M05700
Wiseco

Wiseco Pro-Lite Piston Kit - 559M05700 Yamaha YZ 125 1986-1988

MPN: 559M05700
Availability:
20 in stock, ready to be shipped
Forged from high-silicon aluminum alloy for maximum strength and dependability Wiseco offers a complete range of popular piston models and years for both trail and racing applications Durability, longevity and increased horsepower Innovative forging design and piston skirt provide maximum horsepower and torque Features forged pistons, rings, wrist pins, and circlips These high-tech piston designs offer maximum compression ratios, ultra-stiff strutted forgings, and titanium nitride-coated rings, which all add up to more power that is sustained longer Each piston is E-Coated on the crown, ring grooves, and pin bore, for maximum wear resistance and protection from micro-welding, galling, and detonation GP Series parts generally have less machining on the outside, which helps seal up the bore for increased compression Additionally, boost ports are removed for a more predictable powerband and increased pull on the top end Cylinder sleeves must be purchased separately. Service intervals may be increased with Racer's Choice pistons over conventional Wiseco pistons, and are for expert racers and tuners only. Specs Engine Type 2-Stroke Bore - Oversize +1.00 mm Compression Ratio Stock Displacement 123 cc Skirt Coating Non-Coated Piston Diameter 56.95 mm Stroke Length 50.00 mm Units Kit Stroke Length 50,00 mm Piston Material Forged Bore - Oversize +1,00 mm Bore Size 57.00 mm Piston Material 4032 Aluminum Alloy Riding Style Off-Road Model Pro-Lite Product Name Piston Kit Part Notes Power valve modification required.
Original price $154.95 - Original price $154.95
Original price
$154.95
$154.95 - $154.95
Current price $154.95

Product Details

Features

  • Forged from high-silicon aluminum alloy for maximum strength and dependability
  • Wiseco offers a complete range of popular piston models and years for both trail and racing applications
  • Durability, longevity and increased horsepower
  • Innovative forging design and piston skirt provide maximum horsepower and torque
  • Features forged pistons, rings, wrist pins, and circlips
  • These high-tech piston designs offer maximum compression ratios, ultra-stiff strutted forgings, and titanium nitride-coated rings, which all add up to more power that is sustained longer
  • Each piston is E-Coated on the crown, ring grooves, and pin bore, for maximum wear resistance and protection from micro-welding, galling, and detonation
  • GP Series parts generally have less machining on the outside, which helps seal up the bore for increased compression
  • Additionally, boost ports are removed for a more predictable powerband and increased pull on the top end
  • Cylinder sleeves must be purchased separately.
  • Service intervals may be increased with Racer's Choice pistons over conventional Wiseco pistons, and are for expert racers and tuners only.

Specs

Engine Type 2-Stroke
Bore - Oversize +1.00 mm
Compression Ratio Stock
Displacement 123 cc
Skirt Coating Non-Coated
Piston Diameter 56.95 mm
Stroke Length 50.00 mm
Units Kit
Stroke Length 50,00 mm
Piston Material Forged
Bore - Oversize +1,00 mm
Bore Size 57.00 mm
Piston Material 4032 Aluminum Alloy
Riding Style Off-Road
Model Pro-Lite
Product Name Piston Kit

Part Notes

  • Power valve modification required.

Product Description

Features

  • Forged from high-silicon aluminum alloy for maximum strength and dependability
  • Wiseco offers a complete range of popular piston models and years for both trail and racing applications
  • Durability, longevity and increased horsepower
  • Innovative forging design and piston skirt provide maximum horsepower and torque
  • Features forged pistons, rings, wrist pins, and circlips
  • These high-tech piston designs offer maximum compression ratios, ultra-stiff strutted forgings, and titanium nitride-coated rings, which all add up to more power that is sustained longer
  • Each piston is E-Coated on the crown, ring grooves, and pin bore, for maximum wear resistance and protection from micro-welding, galling, and detonation
  • GP Series parts generally have less machining on the outside, which helps seal up the bore for increased compression
  • Additionally, boost ports are removed for a more predictable powerband and increased pull on the top end
  • Cylinder sleeves must be purchased separately.
  • Service intervals may be increased with Racer's Choice pistons over conventional Wiseco pistons, and are for expert racers and tuners only.

Specs

Engine Type 2-Stroke
Bore - Oversize +1.00 mm
Compression Ratio Stock
Displacement 123 cc
Skirt Coating Non-Coated
Piston Diameter 56.95 mm
Stroke Length 50.00 mm
Units Kit
Stroke Length 50,00 mm
Piston Material Forged
Bore - Oversize +1,00 mm
Bore Size 57.00 mm
Piston Material 4032 Aluminum Alloy
Riding Style Off-Road
Model Pro-Lite
Product Name Piston Kit

Part Notes

  • Power valve modification required.

Part Numbers
Store SKU MFR. Product # Availability
559M05700 559M05700 In Stock
Fitment
This product is vehicle specific. Select your vehicle to confirm fitment.

This Product Fits

Fitment Disclosure

This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.

Features

  • Forged from high-silicon aluminum alloy for maximum strength and dependability
  • Wiseco offers a complete range of popular piston models and years for both trail and racing applications
  • Durability, longevity and increased horsepower
  • Innovative forging design and piston skirt provide maximum horsepower and torque
  • Features forged pistons, rings, wrist pins, and circlips
  • These high-tech piston designs offer maximum compression ratios, ultra-stiff strutted forgings, and titanium nitride-coated rings, which all add up to more power that is sustained longer
  • Each piston is E-Coated on the crown, ring grooves, and pin bore, for maximum wear resistance and protection from micro-welding, galling, and detonation
  • GP Series parts generally have less machining on the outside, which helps seal up the bore for increased compression
  • Additionally, boost ports are removed for a more predictable powerband and increased pull on the top end
  • Cylinder sleeves must be purchased separately.
  • Service intervals may be increased with Racer's Choice pistons over conventional Wiseco pistons, and are for expert racers and tuners only.

Specs

Engine Type 2-Stroke
Bore - Oversize +1.00 mm
Compression Ratio Stock
Displacement 123 cc
Skirt Coating Non-Coated
Piston Diameter 56.95 mm
Stroke Length 50.00 mm
Units Kit
Stroke Length 50,00 mm
Piston Material Forged
Bore - Oversize +1,00 mm
Bore Size 57.00 mm
Piston Material 4032 Aluminum Alloy
Riding Style Off-Road
Model Pro-Lite
Product Name Piston Kit

Part Notes

  • Power valve modification required.