70cc 90cc 110cc Cylinder Valve Rebuild Kit for Chinese 4-Stroke ATV Dirt Bike

Product Overview

Restore your engine's compression and performance with this comprehensive Cylinder Valve Rebuild Kit. Specifically designed for 4-stroke horizontal engines ranging from 70cc to 110cc, this all-in-one kit provides every component needed to refresh your cylinder head. From high-temp resistant valves to precision stem seals, this kit ensures a perfect seal and smooth valve train operation for your Chinese-manufactured ATV, Pit Bike, or Go Kart.

Product Compatibility

This kit is universal for most Chinese 4-Stroke Horizontal Air-Cooled Engines.

Vehicle Type	Popular Compatible Brands
ATV / Quad	TaoTao, Sunl, Buyang, Coolsport, Kazuma, Peace Sports
Dirt Bike / Pit Bike	SSR, Apollo, Piranha, Baja, X-Pro, Motovox
Go Kart / Buggy	Kandi, Yerf-Dog, Roketa, Coleman

Fits 70cc, 90cc, and 110cc horizontal engines. Please verify your valve length and diameter against the specifications below before ordering.

Specifications

Feature	Intake Valve	Exhaust Valve
Engine Cycle	4-Stroke	4-Stroke
Outer Diameter (OD)	23mm (0.90")	20mm (0.78")
Valve Length	66mm (2.59")	65mm (2.55")
Stem Shaft Diameter	5mm (0.19")	5mm (0.19")
Engine Style	Horizontal	Horizontal

Key Features

• Complete Rebuild Solution: Includes valves, dual springs (inner/outer), stem seals, seats, retainers, and cotter clips—everything needed for a full head service.
• Dual Spring Design: Features high-tension inner and outer valve springs to prevent valve float at high RPMs.
• Premium Stem Seals: High-quality rubber seals prevent oil from entering the combustion chamber, eliminating blue exhaust smoke.
• Extreme Heat Durability: Constructed from high-grade alloys to withstand the intense thermal stress of air-cooled off-road engines.
• OEM Precision: Manufactured to exact factory specifications for Chinese 110cc-class engines, ensuring consistent valve timing and power.