RM125 Cylinder Repair – High-Revving 125cc 2-Stroke Resleeving
The Suzuki RM125 is a competition-focused 2-stroke engine that relies on precise cylinder geometry and durable port edges to deliver consistent high-RPM power.
Excessive wear, deep scoring, or damaged plating can reduce performance and limit future repair options.
MotoMonk provides a dedicated RM125 cylinder repair and resleeve service using a model-specific cast iron sleeve. This approach restores bore accuracy, improves port durability, and allows future service through standard oversize boring.
YOUTUBE Video how we sleeve a Nikasil cylinder.
https://www.youtube.com/watch?v=Ma68gdH2QQY&t=190s
Why Choose MotoMonk for Your Suzuki RM125 Cylinder Repair?
Extensive experience with Suzuki RM125 engines across multiple generations
Precision resleeving focused on bore accuracy and port longevity
Improved durability compared to thick replating repairs
Accurate piston-to-cylinder matching for reliable performance
Suzuki RM125 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.