Kibblewhite Top End Service Kit - 80-81200 | Yamaha YZ250F 2014-2018

Features:

• Complete piston assembly, gasket kit and valves to rebuild or service your bikes top end
• Cost saving built into purchasing these components as a kit
• Designed specifically for the performance demands of MX Bikes and Quads
• Pistons designed to maintain stock compression
• 2618 Alloy Fully CNC Machined Piston with performance skirt coating
• KPMI® High Performance Valvetrain is known to outlast OEM by twice the service life
• Lightweight Racing Spring Kit compatible with high performance cams

Included:

• Piston, Rings, Clips and Pin - (2618 Alloy Fully CNC Machined Race Piston)
• Complete Top End Gasket Kit by Cometic™
• KPMI® S.S. Black Diamond™ Valves, Stock Head Dia. (All Valves)
• Complete Dual Spring / High Performance Titanium Retainer Spring Kit

Specifications:

• Piston Bore Size: 77 mm
• Type: Intake/ Exhaust
• Retainer Material: Titanium
• Intake Valve Lift: 0.395"
• Intake Installed Height: 1.150"
• Intake Seat Pressure: 55
• Intake Open Pressure: 151
• Intake Lift: 0.395"
• Exhaust Valve Lift: 0.370"
• Exhaust Installed Height: 1.100"
• Exhaust Seat Pressure: 46
• Exhaust Open Pressure: 119
• Exhaust Lift: 0.370"
• Valve Type: Intake/ Exhaust
• Valve Material: Black Diamond Stainless
• Coating: Black Nitrogen
• Intake Head Diameter: 31.00 mm/ 1.220"
• Intake Stem Diameter: 5.0 mm/ 0.1962"
• Intake Tulip: 18º
• Intake Overall Length: 3.265"
• Exhaust Head Diameter: 25.00 mm/ 0.984"
• Exhaust Stem Diameter: 4.5 mm/ 0.1760"
• Exhaust Tulip: 30º
• Exhaust Overall Length: 3.235"

Note: The piston assembly (piston, rings, pin and pin clips) in this kit are designed to work together as a system. When used complete, the piston assembly can be used as an OEM replacement. The individual components are NOT INTERCHANGEABLE with O.E.M. piston assembly components.

Installation Instructions