Athena Big Bore Kit

• Product Details

  Athena offers a wide range of cylinder kits for scooters and motorcycles with diameters and portings completely re-designed as original spare parts and / or specific boost to be used on tracks. In particular, racing kits consist of lighter pistons with a flat head, special portings, exhaust bridge, and a new cylinder head designed to increase the compression ratio and improve internal combustion. For some models Athena also supplies special long stroke racing kits complete with crankshafts and reinforced connecting rods.

  The Athena Big Bore kit is the missing source for increasing your motorcycles raw power.

  • The included cylinder is constructed out of aluminum with a nickel-carbide coating to increase durability.
  • The water jets have been widened for a higher flow rate, keeping the cylinder cool.
  • Athena built a reliable cast piston that has been molybdenum-coated for high performance use and extended wear life.
  • Includes a specially designed gasket kit to accommodate the big bore features.
  • Each kit also includes easy-to-follow step-by-step installation instructions.
  • Notes: Some kits will require case boring. Kits for 4-stroke applications do NOT include cylinder head. Image is for display purposes ONLY and may not represent actual product.

  Note: All Athena products which are manufactured with higher displacement and power than those permitted by law of the country where the end user lives are intended solely for competition-sports usage.

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• Athena Big Bore Kit Review

• 153 Questions about the Athena Big Bore Kit

• Fitment

• # Part Numbers for the Athena Big Bore Kit

  Product Variant	Manufacturer Part #
  105cc	P400485100038
  130cc	P400250100005
  144cc	P400250100011, P400485100030, P400485100029
  164cc	P400210100023
  276cc	P400270100015, P400270100017, P400270100021
  280cc	P400210100009, P400270100004, P400270100007
  290cc	P400250100013, P400250100018, P400510100004, P400510100020, P400485100032, P400485100026, P400485100012, P400250100019
  293cc	P400485100042
  300cc	P400220100002, P400220100004
  365cc	P400270100005, P400270100011
  435cc	P400510100002
  478cc	P400485100016, P400485100021, P400485100014
  480cc	P400210100007
  490cc	P400210100030, P400210100001, P400210100021, P400250100003, P400250100015, P400510100008, P400510100006, P400510100012, P400510100016, P400250100010, P400250100023
  80cc	P400270100002, P400250100007

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