Vertex Cast Replica Piston Kit for 2-Stroke KTM EXC 300 / Husqvarna TE 300 (71.9 mm)
Product overview
This Vertex cast replica piston kit is engineered as an original equipment-style replacement for selected 2-stroke KTM EXC 300 and Husqvarna TE 300 engines with a 71.9 mm gravity-cast aluminum construction with high silicon content and a molybdenum disulphide skirt coating provides a durable solution for enduro and off-road use, combining reliable performance with long service life.
Key features and benefits
- Cast OE-style replica piston – designed to closely match original equipment geometry and clearances for dependable fit and performance.
- T-5 heat treatment – hardening and tempering cycle improves structural strength and thermal stability under sustained off-road conditions.
- Gravity-cast aluminum alloy with 18% silicon – optimized balance of low weight, wear resistance, and controlled expansion in high-temperature 2-stroke engines.
- Molybdenum disulphide skirt coating – reduces friction during initial start-up, supports faster break-in, and helps extend piston and cylinder life.
- Complete rebuild kit – includes piston, ring set, wrist pin, and circlips to simplify top-end servicing.
- Designed for off-road endurance – suitable for demanding enduro and trail riding where consistent compression and reliability are critical.
Typical applications
- Scheduled top-end refresh on 2-stroke KTM EXC 300 and Husqvarna TE 300 models with 71.9 mm bore.
- Engine rebuilds after hours- or race-based maintenance intervals.
- Restoration of performance on high-mileage enduro motorcycles.
- General off-road and trail riding where an OE-style cast piston is preferred.
Technical details
| Brand | Vertex |
| Product type | Cast replica piston kit for 2-stroke engines |
| Engine type | 2-stroke single-cylinder |
| Bore size | 71.9 mm (nominal) |
| Manufacturing process | Gravity-cast aluminum alloy |
| Material composition | Aluminum alloy with approximately 18% silicon content |
| Heat treatment | T-5 hardening and tempering cycle for increased strength |
| Skirt coating | High-tech molybdenum disulphide (MoS2) low-friction coating |
| Piston style | OE replacement cast replica |
| SKU | 23375* |
Kit contents
The Vertex cast replica piston kit is supplied as a complete top-end piston package for a single cylinder:
- Cast replica piston (71.9 mm nominal bore)
- Piston ring set
- Wrist pin
- Circlips
Compatibility
The kit is intended for selected KTM and Husqvarna 2-stroke enduro motorcycles equipped with a 71.9 mm bore 300 cc following applications are indicated by the product designation:
| Brand | Model | Year |
| KTM | EXC 300 (2-stroke) | 2004–2019 |
| Husqvarna | TE 300 (2-stroke) | Selected model years with 71.9 mm bore |
Before installation, matching of bore size, piston clearance, and engine specification to the specific motorcycle model and year is essential.
