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KTM SX 125

Two-stroke 125. Lives on the pipe, dies if you don't service it. Top-end goes off fast under race revs, so swap pistons on a schedule, not when it nips. Reeds tire. Expansion chamber mounts crack from vibration. Check both every meeting. Every part below is fitment-checked against the SX 125. Filter by category, brand or price.

1,903 parts fit this bike

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Showing the first 240 parts. 1663 more match this category.

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Free UK shipping over £100 14-day no-quibble returns OEM-grade parts only UK support · Tue–Fri 9–5, Sat 9–4 Race-shop prices, paddock service Click & collect from Leeds
Free UK shipping over £100 14-day no-quibble returns OEM-grade parts only UK support · Tue–Fri 9–5, Sat 9–4 Race-shop prices, paddock service Click & collect from Leeds