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Ready to step up into the big leagues? The 2025 KTM 85 SX is ready to take you there. Developed on track and at an international level, the KTM 85 SX boasts significantly enhanced handling, improved power delivery, and notable enhancements in race pace over longer distances. All said - the KTM 85 SX is 100% READY TO RACE.
FROM: £6,399.00
The 2025 KTM 85 SX packs fresh firepower and gives an updated engine to the starting gate. Weighing 120 g less than the previous generation, the updated engine produces higher performance and optimized integration with the chassis updates. This means more punch in the low and mid-RPM range, more torque, and improved reliability.
The lightweight 6-speed gearbox is designed to withstand tough conditions, with gear ratios matching the engine characteristics. It uses a secure front sprocket attachment and a "no-dirt" gear shifter.
The 2024 KTM 85 SX has an ultra-durable clutch with a FORMULA hydraulic system, ensuring consistent clutch engagement under all conditions.
The bike is equipped with a 38 mm flat slide MIKUNI TMX carburetor, providing smooth and controllable power throughout the rev range, regardless of altitude and temperature.
Giving this junior rocket its signature ‘Braaap!” is an all-new exhaust system, featuring a new manufacturing process – just like on the full-size 2-stroke KTM SX range. Thanks to the removal of seams between individual sheets, the exhaust flow is optimized, resulting in substantial improvements when it comes to thermodynamics. Simply put – this pipe performs.
The 2025 KTM 85 SX boasts a completely new high-strength chromium molybdenum steel frame design, taken over the full-sized KTM SX range. Together with forged connecting parts, carefully calculated parameters of longitudinal flex and torsional rigidity, and incorporated sheet metal parts allow tailor-made stiffness. The new frame layout features a typical MX design without any cross tube behind the steering head. The rear shock mount is separated from the main upper frame tube like our full-size models, with frame protectors as standard.
Featuring the latest in suspension technology, the 2025 KTM 85 SX is fitted with a state-of-the-art WP XACT AER fork. These ultra-lightweight, 43 mm USD forks feature exceptional damping and comfort, allowing the rider to push the limit confidently.
Stopping power comes from the Formula brake system with radial calipers (four pistons in front, two in the rear) and lightweight Wave brake discs. It offers controlled action and powerful braking.
all-new, “no-dirt” designed footrests offer a bigger surface area to step on while being less susceptible to hooking on deep ruts, and take-offs when scrubbing. The result? Better control and more leverage
The 2024 KTM 85 SX features a white and orange plastics combination, orange seat cover, and eye-catching graphics, showcasing its race-winning intent.
ENGINE | |
| Transmission | 6-Speed |
| Starter | Kickstarter |
| Stroke | 48.95 mm |
| Bore | 47 mm |
| Clutch | Wet, multi-disc clutch, Formula hydraulics |
| Displacement | 84.9 cm³ |
| EMS | MEDJ Digital |
| Design | 1-cylinder, 2-stroke engine |
CHASSIS | |
| Weight (Without fuel) | 68 KG |
| Tank Capacity (Approx.) | 5.4L |
| Front Brake Disc Diameter | 240 mm |
| Rear Brake Disc Diameter | 220 mm |
| Front Brake | Disc Brake |
| Rear Brake | Disc Brake |
| Chain | 428, Non-sealed |
| Frame Design | Central-tube frame with double-cradle |
| Front Suspension | XACT 43 WP Upside-Down fork, Ø 43 mm |
| Rear Suspension | XACT WP PDS mono shock |
| Seat Height | 845 mm |
| Suspension Travel (Front) | 278 mm |
| Suspension Travel (Rear) | 289 mm |
With KTM Finance, nothing stands in your way – you can now ride away on your own dream set of wheels. Our range of finance packages gives you the freedom to hop onto your READY TO RACE bike as early as tomorrow, as well as giving you the option to enhance your KTM even more with official KTM PowerParts.
The benefit of using these finance plans is that you can configure them yourself, making them flexible and tailored to you. You choose an installment amount that best fits your lifestyle and budget by adjusting your deposit or term, and you'll be in the seat before you know it. It's easy to customise the monthly amounts to suit your situation.
You enjoy flexibility with a variety of finance plans from KTM Finance. Want a new motorcycle? A few more performance-boosting KTM PowerParts? What about some extra items from the stylish KTM PowerWear range? No problem! With a range of finance plan from KTM, you'll get exactly what you need. It's flexible and personalised. KTM Finance offers you a full package that fulfills your every wish.
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Finance subject to status. Terms & Conditions apply. At the end of a PCP agreement there are 3 options: (I) Part exchange the vehicle, (ii) Pay the Optional Final Payment / Guaranteed Future Value to own the vehicle or (iii) Return the vehicle. Further charges may be made subject to the condition or mileage of the vehicle. Applicants must be 18 or over. Guarantee may be required. Santander Consumer Finance RH1 1SR.
*PCP available on Road registered models, with a guaranteed future value only.
| OTR | £16,899.00 |
| Customer Deposit | £4,900.00 |
| Amount of Credit | £11,999.00 |
| 36 Monthly Payments of | £105.41 |
| Optional Final Payment | £9,817.50 |
| Total Amount Payable | £18,512.26 |
| Total Charge for Credit | £1,613.26 |
| APR Representative | 4.90% |
| Duration of Agreement | 37 Months |
| OTR | £15,295.00 |
| Customer Deposit | £4,700.00 |
| Amount of Credit | £10,595.00 |
| 36 Monthly Payments of | £90.30 |
| Optional Final Payment | £8,776.25 |
| Total Amount Payable | £16,727.05 |
| Total Charge for Credit | £1,432.05 |
| APR Representative | 4.90% |
| Duration of Agreement | 37 Months |
