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The ATHENA S410210006251 cylinder base gasket is designed for HONDA XR 650 from 2000 to 2007. The base gasket seals between the cylinder and the crankcase. Its thickness matters: it sets the height of the cylinder, and therefore the squish, the compression and, on a two-stroke, the port timing.
Every time the cylinder is removed: a crushed base gasket can't be reused.
Athena, an Italian company founded in 1973 near Vicenza, designs gaskets, pistons and cylinder kits for motorcycles. An OEM supplier to KTM, Ducati, Fantic, Piaggio and Triumph and a partner of the MXGP world championship, it develops its parts on the test bench and on the track with racing teams.
Which thickness should I choose?
The same as your original gasket, unless you are deliberately adjusting the squish.
Should the other gaskets be replaced?
Yes, as soon as the cylinder is removed: a top end gasket kit includes all the gaskets that need replacing.
Check the exact model and year of your bike in the list below before ordering.
Fits:
HONDA XR 650 2007
HONDA XR 650 2006
HONDA XR 650 2005
HONDA XR 650 2004
HONDA XR 650 2003
HONDA XR 650 2002
HONDA XR 650 2001
HONDA XR 650 2000
Click on your bike to see all compatible parts.
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