KTM 250SX Cylinder Repair – High-Output Big-Bore 2-Stroke Resleeving
KTM 250 two-stroke engines are known for strong midrange torque, aggressive port timing, and high thermal load.
Cylinder damage, worn plating, or repeated replating repairs can compromise port durability and limit future service options.
MotoMonk provides a dedicated KTM 250 cylinder repair and resleeve service using a model-specific cast iron sleeve. This method delivers durable port edges, stable bore geometry, and long-term serviceability—especially important for high-output 250cc 2-stroke applications.
YOUTUBE Video how we sleeve a Nikasil cylinder.
https://www.youtube.com/watch?v=Ma68gdH2QQY&t=190s
Why Choose MotoMonk for Your KTM 250SX Cylinder Repair?
Extensive experience with KTM 250SX two-stroke engines
Resleeving focused on durability under high load and temperature
Improved port edge reliability compared to thick replating repairs
Future serviceability through standard oversize boring
KTM 250SX Cylinder Repair / Resleeve
✅ Cylinder sleeved with a model-specific cast iron sleeve
✅ Precision machining for sleeve installation
✅ Port chamfering after sleeving
✅ Final bore & professional honing on our Sunnen honing machine
✅ Cylinder deck machined for optimal gasket surface👉 Optional: Porting services are available upon request. Please contact us before work begins if porting is desired.
What’s Not Included
All parts (including the sleeve)
Piston, rings, bearings, studs, gaskets, seals
Power valve service, cleaning, or repair
Shipping & handlingCylinders must arrive fully stripped. Studs, gaskets, power valve components, and all attachments must be removed. Cylinders received assembled will incur additional labor charges.