Collection: KTM 125 SX Performance Parts, Kits, and Accessories - Moto-House MX
KTM 125 SX Performance Parts, Kits, and Accessories | Moto-House MX
At Moto-House MX, we are the go-to destination for performance parts, kits, and accessories for the KTM 125 SX and 150 SX. With over 40 years of experience building and tuning off-road bikes, our team helps you get more out of your KTM 125 SX.
The KTM 125 SX is a 2-stroke bike known for its lightweight agility, quick-revving engine, and high-rpm powerband on the track. With the right upgrades you can unlock its potential. We focus on top-end and cylinder work, exhaust systems, reed valves, and clutch upgrades. Whether you are doing a full top-end rebuild, adding power, upgrading control, or protecting vital components, we carry the parts to do it.
Rebuild or build up the engine with Vertex, Wiseco, ProX, Cylinder Works, Athena, VHM, and Hot Rods pistons, cylinders, gaskets, and crank components. Add sharp throttle response with V-Force (Moto Tassinari) and Boyesen reed valves. Put the power to the ground with Rekluse and Hinson Racing clutch components, FMF and Pro Circuit exhaust systems, and Twin Air, Pro Filter, No Toil, and UNI air filtration. Improve control and drive with Renthal, ProTaper, ODI, ARC, Raptor Titanium, Flo Motorsports, Works Connection, RFX, and Xtrig bars, sprockets, levers, footpegs, and controls, plus D.I.D. Racing Chain and RK Chains. Protect the bike with Acerbis, UFO, Polisport, Cycra, and Works Connection plastics and guards, stop harder with EBC, Galfer, Moto-Master, and SBS brakes, keep it turning with Pivot Works, All Balls, SKF, and Race Tech bearings and suspension components, keep the system powered with Fire Power, GET Battery, NGK, and Trail Tech electricals, and maintain it with Maxima, Motorex, Muc-Off, and Motul chemicals. Moose Racing, Moose Offroad, 100%, and Alpinestars round it out with everything from hardware and protection to rider gear.
The KTM 125 SX competes directly with bikes like the Yamaha YZ125, Husqvarna TC 125, GasGas MC 125, and TM MX 125.
Get your KTM 125 SX dialed and ready for the next moto — shop the full collection and ship it fast.
Moto-House MX - Choice of Champions - is located in Clermont/Montverde, FL. We are the best shop in Central Florida with lightning-fast shipping.
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Hot Rods - CBK0004 - Bottom End Kit OEM Style - 2014-2015 Husqvarna TC 125, 2007-2015 KTM 125 SX
Regular price $615.95 USDRegular price$686.95 USDSale price $615.95 USDSold out -
Hot Rods CBK0003 - Bottom End Kit - OEM Crankshaft Replacement - 2002-2006 KTM 125 SX
Regular price $768.95 USDRegular price$768.95 USDSale price $768.95 USD -
HOT RODS - CBK0063 - Bottom End Kit - OEM Crankshaft Replacement - 2007-2014 KTM 150 XC, 150 SX, 144 SX
Regular price $768.95 USDRegular price$768.95 USDSale price $768.95 USD -
Moose Racing Pipe Guard - Carbon Fiber - MPG12523 – KTM 125 SX, Husqvarna TC 125, Gas Gas MC 125
Regular price $248.95 USDRegular price$248.95 USDSale price $248.95 USD -
Twin Air Air Filter - 154225 - 154225X - 2023-2025 KTM 250 SX, 250 XC, 125 SX, 125 XC, 300 SX, and 300 XC
Regular price From $35.06 USDRegular price$38.95 USDSale price From $35.06 USDSale -
Moose Racing Brake Pedal - Orange - 1610-0549 - 2017-2022 KTM 125 SX, 150 SX, 250 SX-F, 450 SX-F
Regular price $131.99 USDRegular price$131.99 USDSale price $131.99 USD -
Moose Racing Brake Pedal - Orange - 1610-0548 - 2016 KTM 125 SX, 150 SX, 250 SX-F, 450 SX-F
Regular price $104.95 USDRegular price$104.95 USDSale price $104.95 USD -
Pro Circuit R-304 Silencers - 1151912 - 2019-2022 KTM 125 SX, 150 SX
Regular price $195.56 USDRegular price$195.56 USDSale price $195.56 USD -
Pro Circuit Works Exhaust 2-Stroke Exhaust Pipe - 0751912 - 2019-2022 KTM 125 SX, and 150 SX
Regular price $337.95 USDRegular price$337.95 USDSale price $337.95 USD -
Pro Circuit Works Exhaust 2-Stroke Exhaust Pipe - 0752312 - 2023 KTM 125 SX, 2023 Husqvarna TC 125
Regular price $320.38 USDRegular price$337.95 USDSale price $320.38 USDSale -
Pro Circuit Platinum Pipe - 0852312 - 2023-2024 Husqvarna TC 125, KTM 125 SX
Regular price $352.95 USDRegular price$353.95 USDSale price $352.95 USDSale -
Pro Circuit Platinum Pipe - 0851812 2016-2018 Husqvarna TC 125, TE 150, 2016-2018 KTM 125, 150 SX
Regular price $353.95 USDRegular price$353.95 USDSale price $353.95 USD -
Pro Circuit 296 Spark Arrestor Silencer - 1351912 - 2019-2022 KTM 125 SX, 150 SX
Regular price $220.84 USDRegular price$232.95 USDSale price $220.84 USDSale -
Pro Circuit Ti-2 Carbon Kevlar, Titanium Shorty Silencer - 1152312K - 2019-2022 KTM 125 SX, 150 SX
Regular price $423.71 USDRegular price$446.95 USDSale price $423.71 USDSale -
FMF Turbinecore 2 Seilencer - 025260 - 2019-2022 KTM 125 SX, 150 SX, 125 XC
Regular price $206.99 USDRegular price$229.99 USDSale price $206.99 USDSale -
FMF Turbinecore 2 Silencer - 025260 - 2019-2022 KTM 125 SX, 150 SX, 125 XC
Regular price $206.99 USDRegular price$229.99 USDSale price $206.99 USDSale