’86 ATC250R/TRX250R Pro-X Ported Power Valve 310 Cylinder Kit

CT/Pro-X cylinders are the leading power producing upgrade currently available for Honda 250R engines. CT/Pro-X cylinders are available from 250cc to 410cc (stroked). Whether you are building a “drag only” ATC or an “all round fun” 4Trax, CT has a combination to suit your needs. All CT/Pro-X cylinder kits include these advanced features:

• 100% greater coolant capacity over OEM cylinders.
• Full water jacket exhaust port tunnel for fade-free power.
• O-ring head gaskets for optimum heat transfer and easy maintenance.
• Custom forged piston kit.
• Removable iron liner makes Pro-X cylinders infinitely rebuildable.
• Modern 10-window CT porting layout. CT builds each cylinder order according to your requirements. You may specify your preferred power characteristics. 

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