Go to CycleBuy Flyers

Go to Free Shipping Info

  Bike Stands
  Body Kits
  Bolt Kits
  Cargo Racks
  Fender Packs
  Gas Tanks
  Motorcycle Luggage
  Ramps - MC
  Rim Locks
  Tie Downs/Straps
  Tugger Lift Straps
  Auto Clutches
  Chain Adjusters
  Brake Discs
  Brake Pads
  Left Hand Rear Brakes
  Battery Chargers
  Dual Sport Kits
  Lighting Kit - KTM
  LED Lights
  Turn Signals
  X2 Headlights
  Air Filters
  Auto Clutches
  Fuel Screws
  Jetting Kits
  Filter Screen Bolts
  Fuel Filters
  Fuel Injection Tuners
  Oil Filters
  PowerNow Inserts
  Quickshot 3
  Valve Shim Kits
  Spark Arrestor Endcaps
  Header Pipes
  Heat Shields - KTM
  Pipe Guards
  Bar End Mounts
  Grip Heaters
  Left Hand Rear Brakes
  Steering Stabilizers
  Throttle Cables
  Throttle Cam Systems
  Billet Protectors - KTM
  Computer Protectors
  Disc Guards
  Heat Shields - KTM
  Pipe Guards
  Radiator Guards
  Skid Plates
  Bike to Bike Intercom
  Drink Systems
  Fanny Packs
  Neck Brace
  Waterproofing Spray
  Fork Seal Protector
  Steering Stabilizers
  Motion Pro Tools
  Pocket Chainsaw
  Spoke Torque Wrenches
  TiProlight Wrenches
  Tire/Chain Tools
  Tire Changing Stand
  Tire Combo Levers
  Tire Lever Adapters
  Tool Packs
Authorized Dealer for:

Go to BlueRibbon Coalition Website

    Availability Guide: If you order an item that is not in stock, we will not charge your card until the order is ready to ship.

      = Normally ships the same business day     = Special order, ships in 4 to 7 business days    = Backordered from supplier
PowerParts SXS Parts - Engine 2-Stroke


Add To Cart

SXS Cylinder Head with variable combustion chamber
SXS13125044 - Fits KTM 125/144/150 SX, 125 EXC 200715
SXS13250044 - Fits KTM 250 EXC/SX/XC/XC-W 200715 Instructions
SXS13300044 - Fits KTM 300 EXC/XC/XC-W 200815 Instructions


The all-new SXS two-stroke cylinder heads are a must for the serious racer and two-stroke tuner.  With variable combustion chamber options designed for specific power output and delivery, every rider  can find the SXS cylinder head they need! 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, KTM recommend combination of the SXS cylinder heads with the following parts:  SXS spark plug, SXS CDI unit, and KTM PowerParts exhaust system.
IMPORTANT:  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 = motocross, vehicle = 250 XC-W MY 09 --> appropriate carburetor jets = 250 SX MY 09). Detailed information about carburetor jetting is available from your KTM dealer.
SXS Combustion Chamber Insert - Extreme Setting
SXS13125081 - Fits KTM 125 SX/EXC 200715
SXS13250081 - Fits KTM 250 SX/XC/XC-W/EXC 200715
SXS13300081 - Fits KTM 300 XC/XC-W/EXC 200815


The combustion chamber insert is made from an alloy developed specially for this purpose. The excellent conductivity of this alloy increases the capability of your engine in extreme conditions, particularly when it needs to deliver maximum performance (e.g. in high temperatures, sandy track conditions or other extreme situations).
SXS Combustion Chamber Insert - MX Setting
SXS13125061 - Fits KTM 125 SX/EXC 200715
SXS13144061 - Fits KTM 144/150 SX/XC 200715
SXS13250061 - Fits KTM 250 SX/XC/XC-W/EXC 200715
SXS13300061 - Fits KTM 300 XC/XC-W/EXC 200815


Combustion chamber insert manufactured from highest grade aluminum, with optimized combustion chamber shape suited
for Motocross racing.
SXS Combustion Chamber Insert - Enduro Setting
SXS13250071 - Fits KTM 250 SX/XC/XC-W/EXC 200715
SXS13300071 - Fits KTM 300 XC/XC-W/EXC 200815


Combustion chamber insert manufactured from highest grade aluminum, with optimized combustion chamber shape suited
for Enduro racing.
SXS Combustion Chamber Insert - XC Setting
Fits KTM 250 SX/XC/XC-W 200715


Combustion chamber insert manufactured from highest grade aluminum for more torque delivered over the rev range.
SXS Cylinder Kit
Fits KTM 125 SX 200715


This complete ported and polished cylinder has been finished to Factory Racing specs, using the highest-quality workmanship. This guarantees more power throughout the entire rev range.
SXS Piston
SXS16125907 I
(ETA 06-12-16) - Fits KTM 125 SX 2016 (Group I Cylinder only)
SXS16150907 I - Fits KTM 150 SX 2016 (Group I Cylinder only)


Specially developed high-performance piston with the following properties:  Higher performance across the entire power band
Higher peak power  Optimized friction  Only one piston ring  Special surface coating
Due to the higher load on the engine, the new service intervals specified in the Owner's Manual supplied must be complied with.
SXS 144/150 Cylinder Head
Fits KTM 144/150 SX/XC 2007-15


Specially designed for use on sandy tracks (high thermal loads!). Volume 14.8 ml = less compression (standard: 13.8 ml).
SXS Spark Plug 125 02
Fits KTM 125 SX 2000-15, 144/150 SX/XC 2007-15
Top shelf racing spark plug to help get the most from you 2-stroke.


300 SX Kit
SXS12300000 - Fits KTM 250 SX 2007-13 $949.99
SXS14300000 - Fits KTM 250 SX 2014-15 $959.99


All the parts required for converting your 250 SX to a 300 SX for the open class. No need for the jets to be changed on the 250 SX carburetor.
300 XC/XC-W Kit
Fits KTM 250 XC/XC-W 2007-15


All the parts required for converting your 250 XC or XC-W in to a 300 XC. No additional jetting change needed.
Fits KTM 125 SX 200715, 125 EXC 2008-15


The ignition curve of the SXS CDI unit is specially tuned to the use of fuel with at least 98 octane.
The benefits:  Higher peak power, Higher revs, and Best possible performance.
KTM recommend use in combination with a PowerParts exhaust system and the SXS spark plug.
  PowerParts SXS Parts - Engine 2-Stroke - Larger Images
SXS Cylinder Head with variable combustion chamber SXS Combustion Chamber Insert Extreme


SXS Combustion Chamber Insert MX / Enduro / XC SXS Cylinder Kit SXS11125007



SXS Piston SXS16125907 I / SXS16150907 I SXS 144/150 Cylinder Head SXS10150051

SXS Spark Plug SXS02125071  

Ever had to cut short a training session or a race due to a faulty spark plug? This will never happen again with the extremely robust SXS spark plug and its special properties:
Iridium centre electrode tip
Reinforced earth electrode (against vibration and breakage)
Special design with improved anti-rusting properties

KTM recommend use of the SXS spark plug when fitting power -boosting parts, such as SXS cylinder heads, factory exhaust systems or the SXS CDI unit.
300 SX / XC / XC-W Kits SXS CDI Unit 50339931000

Go to 6D ATR-1 Offroad Helmets
Go to Acerbis Products
Go to All Balls Racing
Go to ARC Composite Levers
Go to Micro-Start Power Supply Kit
Go to Arai Helmets
Go to Battery Tender products
Go to Bauer Switches
Go to BikeMaster Products
Go to Bolt Motorcycle Hardware Products
Go to Boyesen Products
Go to BRP Page
Go to Bullet Proof Designs
Go to California Cycleworks Products
Go to Cardo Scala Rider Helmet Headsets
Go to Clarke Manufacturing Gas Tanks Products
Go to Clockwork Fuel Tanks
Go to CV4 Cooling Products
Go to Cycra Racing Products
Go to DID Racing Chains
Go to Dirt Tricks Products
Go to EBC Brakes
Go to ELine Skid Plates
Go to Enduro Engineering Products
Go to Fasst Company Products
Go to Fastway Products
Go to FMF Products
Go to Flatland Racing Products
Go to G2 Ergonomics Products
Go to Gearne Offroad/Motocross/Dual Sport Boots
Go to Giant Loop Motorcycle Luggage

Go to Hammerhead Products
Go to Hardline Products
Go to Heat Demon Handlebar Grip warmers
Go to HiFlo Oil Filters
Go to HotCams Products
Go to HyperKewl Products
Go to IMS Gas Tanks
Go to Ironman Sprockets Products
Go to JD Jetting Products
Go to JT Sprockets
Go to Klim Technical Riding Gear Products
Go to KnobbyKnife product
Go to Leatt-Brace Products
Go to 24 foot Lockstraps
Go to MSR Products
Go to Moose Racing Products
Go to Motion Pro Tools
Go to Motorex Protex Waterproofing Spray
Go to No-Toil Products
Go to Ogio Hydration Back Packs, Flight Vest, Toolbag, and Accessories
Go to Ohlins Steering Stabilizers

Go to Pivot Works Seals and Bearings
Go to Pocket ChainSaw - The World's Fastest Cutting Pocket Saw
Go to Pro Moto Billet Products
Go to PowerNow Products
Go to ProTaper Grips
Go to Ram Mounts
Go to Rekluse Products
Go to Renthal Sprockets and Chains

Go to Ricochet Skid Plates
Go to Risk Racing Seal Doctor Tool
Go to Scotts Performance Page
Go to Seat Concepts - Complete Seats and Comfort Seat foam and Cover
Go to Shock Sox Removable Fork Seal Protector
Go to Shorai Batteries

Go to Spider Grips
Go to Splitstream Fuel Filter Screen
Go to System Tech Racing Products
Go to TM Designworks Products
Go to Trail Tech Products
Go to BikeMaster TruGel Batteries
Go to Tubliss Products page
Go to Tugger Products
Go to Vision X Solstice Solo Offroad Light Pods
Go to Wolfman Enduro Bags
Go to Xtreme Charge Battery Chargers

          1998 - 2015 CycleBuy.com, All rights reserved. / Order Policies / Privacy Policy
Unauthorized use of any images, descriptions, or editorial content without permission is strictly prohibited.
Address:  1116 S Commercial Way SE, Albany, Oregon 97322 U.S.A.