HENGJIAN Air Filter Foam Assembly S7-Z300-14-03 (3)
The HENGJIAN air filter foam assembly S7-Z300-14-03 (3) is a genuine OEM foam filter element designed for the Hengjian Z300 enduro platform, including S8-Z300 293.2 cm³ 2-stroke off-road provides reliable intake filtration in dusty, off-road environments while maintaining strong airflow for the high-performance 2-stroke engine.
Main features
- OEM HENGJIAN foam air filter assembly corresponding to reference S7-Z300-14-03.
- Model-specific shape for the Z300 airbox for quick, precise installation.
- Multi-porous foam construction for a balance of airflow and effective dust retention.
- Washable and reusable when cleaned and re-oiled with suitable foam filter products.
- Optimised for off-road enduro and motocross-style use on 2-stroke Z300 engines.
- Works together with the dedicated airbox covers, base filter and foam bracket from the S7-Z300-14 component group.
Technical details
| Specification | Value |
| Manufacturer | HENGJIAN |
| OEM reference | S7-Z300-14-03 (3) |
| Product type | Foam air filter assembly for motorcycle airbox |
| Compatible platform | Hengjian Z300 off-road enduro (S8-Z300 platform using S7-Z300 airbox architecture) |
| Engine application | Single-cylinder, 2-stroke, water-cooled ~293 cm³ Z300 engine |
| Material | High-porosity foam filter element, suitable for oil impregnation |
| Maintenance | Designed for regular cleaning and re-oiling with foam air filter cleaner and oil |
| Typical environment | Enduro, cross-country, hard enduro and trail riding in dusty, muddy or sandy conditions |
Vehicle compatibility
The S7-Z300-14-03 foam filter assembly belongs to the S7-Z300 airbox parts family and is used on the Hengjian Z300 enduro platform where this airbox configuration is fitted, including S8-Z300 models.
| Brand | Model | Year |
| Hengjian | S8-Z300 (Z300 2-stroke enduro platform) | Not specified |
Functional benefits
- Helps protect the Z300 2-stroke engine from dust, sand and debris drawn in through the intake.
- Foam structure supports strong airflow to match the responsive power delivery of the high-output Z300 engine.
- Washable, reusable design supports long-term use with correct maintenance instead of frequent replacement.
- Precise OEM fit ensures secure sealing in the airbox when used with the original covers, brackets and hardware.
Typical use cases
- Routine service replacement of the original foam air filter assembly on Hengjian S8-Z300 enduro motorcycles.
- Preparing a Z300 bike for enduro, cross-country or training use in heavy dust or sand.
- Maintaining optimal filtration and airflow on competition-focused Z300 machines subjected to frequent washing and servicing.
- Keeping a spare OEM foam insert ready for quick filter changes between motos or long riding days.
