80mm 330cc Big Bore Cylinder Piston Kit Honda TRX300EX 1993-2008 12100-HM3-L00

80mm big bore top end kit for the Honda TRX300EX. New, complete.

This is not your average standard bore top end kit. This is a big bore performance engine rebuilding kit that carries a premium over standard rebuild kits. Note: this is not a stock rebuild. It takes the engine from 74mm and 282cc up to 80mm and roughly 330cc at 11 to 1 compression. Plan on rejetting the carburetor and running premium fuel.

Bore: 80mm
Stroke: 65.5mm
Displacement: approximately 330cc
Compression: 11 to 1
Piston: high silicon cast, Teflon coated skirts, anodized dome

Fitment
Honda TRX300EX Sportrax 300, 1993 to 2008
Honda TRX300X, 2009

Does not fit the TRX300 or TRX300FW Fourtrax utility quads. Those use a different cylinder, part number 12100-HC4-000. Check your part number before ordering.

Replaces
Cylinder 12100-HM3-L00, 12100-HM3-670
Piston 13101-HM3-670
Piston pin 13111-HC0-000
Ring set 13011-HM3-671
Head gasket 12251-HC0-013, 12251-HC0-003
Base gasket 12191-HM3-670, 12191-HC0-000
Circlips 94601-17000

Included: cylinder, piston, ring set, wrist pin, two circlips, head gasket and base gasket.

ADDITIONAL INFORMATION FOR VERIFICATION:
Type: Cylinder Piston Gasket Top End Rebuild Kit
Bore Type: Big Bore
Bore Size: 80mm
Stroke: 65.5mm
Displacement: 330cc
Compression Ratio: 11:1
Manufacturer Part Number: 12100-HM3-L00, 12100-HM3-670
Reference OEM Number: 13101-HM3-670, 13011-HM3-671, 13111-HC0-000, 12251-HC0-013, 12191-HM3-670, 94601-17000
Cylinder Material: Cast Aluminum
Piston Material: Cast Aluminum, Teflon Coated
Items Included: Cylinder, Piston, Piston Rings, Piston Pin, Circlips, Head Gasket, Base Gasket
Compatible Vehicle Make: Honda
Placement on Vehicle: Front
Country of Origin: China
Condition: New