Namura Standard Bore Size A 66.34mm Piston Kit for KTM 250 SX SXS EXC XC 66.4mm
Namura Standard Bore Size A 66.34mm Piston Kit for KTM 250 SX SXS EXC XC 66.4mm
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Standard Bore Size A 66.34mm Piston Kit for KTM
This piston kit is a direct replacement for KTM 250 SX, SXS, EXC, and XC models, featuring a 66.34mm bore size to restore OEM compression and performance.
Overview
This piston kit provides a reliable replacement for your KTM 250 dirt bike, delivering consistent power and durability. Designed for models requiring a 66.34mm bore, this piston kit ensures proper fitment and long service life. Ideal for riders seeking to maintain or rebuild their KTM 250 engine.
Built For Performance
- Precision-machined from high-strength aluminum alloy
- Includes piston rings, wrist pin, and circlips
- Compatible with stock cylinder dimensions
- Reduces engine wear with improved thermal management
- Tested for consistent compression and sealing
Fits These Machines
- for KTM 250 SX
- for KTM 250 SXS
- for KTM 250 EXC
- for KTM 250 XC
On-The-Job Use
- Motocross racing and track days
- Enduro and cross-country riding
- Trail riding and recreational off-road
- Engine rebuilds and top-end replacements
Specs At A Glance
| Bore Diameter | 66.34mm |
| Oversize | 0.06mm relative to 66.4mm |
| Compatible Models | KTM 250 SX/SXS/EXC/XC |
Good To Know
Q: What is the recommended break-in for this piston kit?A: Follow the engine manufacturer's break-in guidelines, typically avoiding sustained high RPM for the first hour of operation.
Q: Does this piston kit include wrist pin bearings?A: Yes, the kit includes the wrist pin, circlips, and rings for a complete top-end rebuild.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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