Genuine KTM Cylinder & Piston Kit – A40030038000

 

This is a genuine OEM KTM cylinder and piston assembly, part number A40030038000. It fits the 2024-onwards KTM SX 50, Husqvarna TC 50 and GASGAS MC 50 youth motocross bikes. It's the factory replacement top end for a worn bore or a seized engine, or for a full rebuild back to original specification.

 

Key facts

• Part number (MPN): A40030038000
• Brand: KTM (genuine OEM, also fits Husqvarna and GASGAS)
• Engine: 50cc two-stroke, 2024-onwards generation
• Included: [cylinder, piston, rings, gudgeon pin, clips]
• Not included: [gaskets / small-end bearing]

Fitment

Make	Model	Years
KTM	SX 50	2024 – 2027
KTM	SX 50 Factory Edition	2024 - 2027
Husqvarna	TC 50	2024 – 2027
GASGAS	MC 50	2024 – 2027

Does not fit 2023 and earlier SX 50, TC 50 or MC 50 models, which use a different engine.

 

Fitting tip

Set the piston height correctly when you fit it. Use our KTM SX50 / TC50 / MC50 Piston Height Tool.

 

Frequently asked questions

 

Is this a genuine KTM part?
Yes. It's original KTM factory stock, supplied by Judd Racing, an authorised KTM, Husqvarna and GASGAS dealer in the UK.

Will it fit my 2023 SX 50?
No. This part is for the 2024-onwards models only.

Is it the same part for the Husqvarna TC 50 and GASGAS MC 50?
Yes. All three models share part number A40030038000.

How fast is delivery?
In-stock orders placed before 1pm Monday to Friday are dispatched the same day.

We deliver to most countries. If you are unsure, feel free to contact us and we can help you out.

For more information, please visit our Shipping and Delivery Page.

We accept returns. You can return unopened items in the original packaging within 30 days of your purchase with receipt or proof of purchase. If 30 days or more have passed since your purchase, we cannot offer you a refund or an exchange.

For more information, please visit our Returns and Refunds Page.