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Description
Technical Specifications
- MFG. Part Number 17-8674
Vehicle Information
KTM 65 SX Dirt Bike (1998-2026)
The KTM 65 SX, a leading youth motocross motorcycle, has been continuously developed from 1998 to 2026. This high-performance 64.9 cc liquid-cooled, single-cylinder, two-stroke machine is designed for young riders seeking competitive edge. While generally offered as a single, purpose-built model, significant evolutionary changes have occurred. Major revisions include the 2010 "SXS Factory Racing version," a limited edition with increased horsepower (19.5 HP) and performance upgrades like an FMF exhaust. A substantial overhaul in 2018 brought a revised frame, a new cast aluminum swingarm, redesigned exhaust, and updated engine cases. Building on this, the introduction of the WP AER 35 air fork marked a significant suspension upgrade. The 2024 model saw a ground-up redesign with an all-new frame, subframe, bodywork for improved ergonomics, a tilted engine, and a new WP XACT rear shock. For 2026, the model features a revised WP XACT AER front fork and enhanced adjustability for growing riders. FAQ:
Q: How can I find parts specific to my KTM 65 SX model year?
A: To ensure perfect compatibility, please use the year and edition selector at the top of this page. Q: Are parts interchangeable between different model years of the KTM 65 SX?
A: Due to significant design changes over the years, part compatibility varies. Always use our year and edition selector to find the correct parts for your specific motorcycle.
Maintenance
| Component | Interval | Details |
| Transmission/Gear Oil Changes | Every 5 to 10 hours or after every intense race | The KTM 65 SX is a 2-stroke motorcycle. It uses transmission/gear oil, not engine oil with a separate filter like 4-strokes. Typical fill is 300 ml. |
| Air Filter Service | Every 5 to 15 hours or after every ride in dusty/muddy conditions | A clean air filter is essential for optimal engine performance and longevity. Clean or replace more frequently in harsh conditions. |
| Spark Plug | Check and replace as needed | Regularly inspect the spark plug and its connectors for good condition and tightness. |
| Coolant | Check levels every 15 hours; replace every 24 months | Maintain proper coolant levels to prevent engine overheating. |
| Valve Inspections | Every 20 to 30 hours or every 15 to 20 hours for aggressive riding | Check and adjust valve clearance to ensure proper engine operation. |
| Top-End Inspections (Piston and Cylinder) | Every 20 to 50 hours or every 15 to 30 hours for aggressive riding | Inspect piston and cylinder for wear and damage. Crucial for engine performance and reliability. |
| Bottom-End Inspections (Crankshaft and Bearings) | Every 40 to 100 hours or every 30 to 50 hours for aggressive riding | Check crankshaft and bearings for wear. Preventive maintenance extends engine life. |
| Brake Fluid | According to service schedule | Change brake fluid regularly to maintain braking efficiency and safety. |
| General Checks | Every 15 hours | Check tightness of all screws, nuts, and hose clips. Inspect clutch, carburetor, and exhaust system. |