ATHENA Cylinder Base Gasket for HONDA CRF 100, XR 100 1979-2009

ATHENA offers this cylinder base gasket for HONDA CRF 100, XR 100 1979-2009. The base gasket sits under the cylinder, on the crankcase. Crushed when tightened, it cannot be reused: replace it every time the cylinder comes off.

Why does the thickness matter?

The benefits:

• The OE thickness keeps the cylinder height intended by the manufacturer.
• Another thickness lets you correct piston-to-head clearance after machining or adjust the port timing of a 2-stroke.
• A new gasket keeps the bottom end sealed against oil and gases.

Why choose ATHENA?

Athena, founded in 1973 by Giovanni Mancassola near Vicenza and based in Alonte (Italy), designs gaskets, pistons and cylinder kits; it supplies original equipment to manufacturers such as KTM, Ducati, Fantic and Triumph.

When should you replace the base gasket on your HONDA XR 100?

Every time the cylinder comes off: piston change, top-end rebuild or cylinder inspection. Oil or mixture seeping at the base of the cylinder also points to a tired gasket.

No manufacturer figure in hours for this model. Cross-Mania guideline: compression check every 50 h of hard use and every 100 h of leisure riding.

Specifications and fitting tips

• Thickness : OE
• Manufacturer part number: S410210006067

Cross-Mania tip: Choose the OE thickness if the cylinder and head have not been machined; if in doubt, measure the squish with solder wire before final assembly.

Spare parts and items to plan

• Top-end gasket kit : ATHENA S410210015039 · ATHENA P400210600103
• Piston : WISECO W4666M05 · WISECO 4666M05400
• Piston rings : WISECO 2146XE · WISECO 2165XE
• Coolant : LIQUI MOLY 1 L · TWIN AIR

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
HONDA CRF 100 2009
HONDA CRF 100 2008
HONDA CRF 100 2007
HONDA CRF 100 2006
HONDA CRF 100 2005
HONDA CRF 100 2004
HONDA XR 100 2003
HONDA XR 100 2002
HONDA XR 100 2001
HONDA XR 100 2000
HONDA XR 100 1999
HONDA XR 100 1998
HONDA XR 100 1997
HONDA XR 100 1996
HONDA XR 100 1995
HONDA XR 100 1994
HONDA XR 100 1993
HONDA XR 100 1992
HONDA XR 100 1991
HONDA XR 100 1990
HONDA XR 100 1989
HONDA XR 100 1988
HONDA XR 100 1987
HONDA XR 100 1986
HONDA XR 100 1985
HONDA XR 100 1984
HONDA XR 100 1983
HONDA XR 100 1982
HONDA XR 100 1981
HONDA XR 100 1980
HONDA XR 100 1979