• More horsepower for your 883cc or 1100cc Sportster
• This kit makes it easy to give your 883cc or 1100cc a larger displacement by boring the stock cylinders or installing our CY103 cylinders with the pistons in this kit
  
• 883cc requires head combustion chamber modification to reduce compression ratio to a workable level of approximately 9.5 to 1
• This is achieved with a hand grinder - no expensive machining is needed
• On 1100cc no head work is required
• The end result is a 1200cc Sportster
• In the kit is a complete set of instructions, including template for head work on 883cc.
• The kit includes: - High quality cast aluminum pistons - Rings, pins and lock rings - Top end gasket set - Complete Instructions including  template for head work on 883cc.
• Fits 1986/1990

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