Factory cylinder head


Out of stock

SKU: SXS13125050

The SXS cylinder heads with variable combustion chamber are a must for every racer. The aluminum alloys and optimized combustion chamber shapes employed ensure the best possible heat dissipation. This has a positive effect on power delivery and reduces material wear in the combustion chamber and on the piston. Replacement of the whole head is now no longer necessary – simply put in a new combustion chamber insert and off you go again. To increase the performance of your bike even further, we recommend combining SXS cylinder heads with the following parts:

  • SXS spark plug
  • SXS CDI unit
  • Factory exhaust system

The carburetor jets must be matched with the selected combustion chamber insert and the model year of your vehicle
(e.g. selected combustion chamber insert = type Motocross, vehicle
= 125 EXC MY 09 appropriate carburetor jets = 125 SX MY 09).
When using the “EXTREME” combustion chamber insert, the SX carburetor jets of your vehicle model year must always be selected.
Detailed information about carburetor jets is available from your KTM dealer.

Without combustion chamber insert.



Model Year

2012, 2013, 2014, 2015