CR85 Cylinder Repair – Precision Small-Bore 2-Stroke Machining
The Honda CR85 is a fast-revving small-bore race engine that relies on precise cylinder geometry for power and reliability.
Wear, scoring, or compression loss can quickly reduce performance. In these cases, resleeving offers a durable and serviceable repair solution, especially for long-term use.
MotoMonk provides a dedicated CR85 cylinder repair service, using model-specific cast iron sleeves, precision finish honing, and properly chamfered ports to restore correct clearances, durability, and consistent performance.
YOUTUBE Video how we sleeve a Nikasil cylinder.https://www.youtube.com/watch?v=Ma68gdH2QQY&t=190s
Why Choose MotoMonk for Your Honda CR85 Cylinder Repair?
Extensive experience with CR85 and competitive small-bore 2-stroke engines
Precision resleeving performed with tight, controlled tolerances
Focus on port edge durability and piston-to-cylinder matching
Clear inspection feedback and recommendations before machining
Honda CR85 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.