ATHENA Cylinder Base Gasket for KTM SX 85, SX 105, XC 85, XC 105 and HUSQVARNA TC 85 2003-2017

ATHENA offers this cylinder base gasket for KTM SX 85, SX 105, XC 85, XC 105 and HUSQVARNA TC 85 2003-2017. 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 KTM SX 85?

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 15 h of hard use and every 30 h of leisure riding.

Specifications and fitting tips

• Manufacturer part numbers: S410270006068 (0.20 mm), S410270006069 (0.30 mm), S410270006070 (0.50 mm)

Choose the thickness from the list. "OE" is the factory thickness; another thickness is used to set the cylinder height after a rebuild (piston-to-head clearance, port timing on a 2-stroke).

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 M752005400094 · ATHENA M752008000094
• Piston : VHM APKT08521707 · VHM APKT08521707A1
• Piston rings : ATHENA · PROX
• Coolant : LIQUI MOLY 1 L · TWIN AIR

Compatibility

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

Fits:
HUSQVARNA TC 85 2017
HUSQVARNA TC 85 2016
HUSQVARNA TC 85 2015
HUSQVARNA TC 85 2014
KTM SX 85 2017
KTM SX 85 2016
KTM SX 85 2015
KTM SX 85 2014
KTM SX 85 2013
KTM SX 85 2012
KTM SX 85 2011
KTM SX 85 2010
KTM SX 85 2009
KTM SX 85 2008
KTM SX 85 2007
KTM SX 85 2006
KTM SX 85 2005
KTM SX 85 2004
KTM SX 85 2003
KTM SX 105 2011
KTM SX 105 2010
KTM SX 105 2009
KTM SX 105 2008
KTM SX 105 2007
KTM SX 105 2006
KTM SX 105 2005
KTM SX 105 2004
KTM XC 85 2013
KTM XC 85 2012
KTM XC 85 2011
KTM XC 85 2010
KTM XC 85 2009
KTM XC 85 2008
KTM XC 85 2006
KTM XC 85 2005
KTM XC 85 2004
KTM XC 85 2003
KTM XC 105 2011
KTM XC 105 2010
KTM XC 105 2009
KTM XC 105 2008
KTM XC 105 2007
KTM XC 105 2006
KTM XC 105 2005
KTM XC 105 2004