Cylinder Kit 04-05 Trx450R 480, Works Cyclinder 11003-K01, Big Bore 97.00Mm

The Big Bore Cylinder Kit (Part Number: 11003-K01) is designed to enhance the performance of the 2004–2005 Honda TRX450R Sportrax. This +3mm Big Bore Kit increases the engine displacement to 479cc with a 10.5:1 compression ratio. When paired with the Hot Rods #4160 crankshaft, the displacement increases further to 500cc. The kit includes all necessary components for a complete installation, making it a powerful upgrade option for improved performance.

Features:

• (+3mm Big Bore Kit) increases displacement to 479cc with a 10.5:1 compression ratio.
• Achieves 500cc when paired with Hot Rods #4160 crankshaft.
• Bore size: 97.00mm.
• Includes high-quality Vertex #23531 piston.
• Complete kit with cylinder, piston, rings, pin, clips, and gaskets.

Replacement Parts:

• Replacement Big Bore Cylinder: Order No. 140421
• Replacement Big Bore Piston Kit: Order No. 131453S
• Replacement Big Bore Piston Rings: Order No. 131453SR
• Replacement Big Bore Gasket Kit: Order No. 263953

Vehicle Compatibility:

• Honda TRX450R Sportrax: 2004–2005

Cross-Reference Part Numbers:

• 12101-HP1-670
• ATHENA P400210100007
• S4F09700010A
• P400210160005
• S41316060
• S41317039
• 422-11003K
• 0931-0133
• 733706
• Dec-52
• HR11003K01
• 77000-37
• K8610D300-1ZA
• TW400210100007
• P400210100007 (Size: 97mm Bore)

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex