Namura

NM-180657-53-KS

1986-1991 Honda CR250 Dirt Bike Top End Engine Rebuild Kit [Bore Size (mm): 66.84]

Pistons

Bore Size (mm): 66.84
Nikasil Cylinder
Namura Top End Repair Kits Include a Top End Gasket Set, Pistons, Rings, Wrist Pins, Circlips and Silver Coated SCM415 High Strength Chromoly Needle Bearings (Where Applicable)
Precision Cut Klingersil Coated Steel Head Gaskets for Better Sealing and High-Temperature Resistance
Compatibility: 1986-1991 Honda CR250

Namura Top End Engine Rebuild Kit

All Namura Pistons have Molybdenium/Teflon Coatings that Minimize Resistance and Wear to Provide Extended Life

Anodized Domes That Provide Superior Heat Resistance and Extended Life Span

Super-High Silicone Content for Additional Strength

Premium World Class Rings Produced by the Largest Japanese OEM Supplier in the World

MOS(Teflon/Molybdenum) Coated Skirts
A rolled on application process provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures

Machined Smooth Heads
Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horse power and fuel economy by up to 6%

Anodized Domes
Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons

Hypereutectic Casting Process
Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures

GMC Yukon 4DR Half Chrome Mirror Covers (MC-GMC-11H)
Mopar 2656AA Parking Brake Spring 04862656AA
Mix me 550