X-GRIP TORQUE DISC – Light 273 g Flywheel Weight
The X-GRIP TORQUE DISC, also known as the TORQUE KING, is a clutch-mounted flywheel mass designed to add rotational inertia to KTM, Husqvarna and GasGas 250–300 two-stroke enduro the XG-2638 configuration, the disc provides a light 273 g weight increase, significantly reducing RPM drop, enhancing torque and giving the engine a smooth, trial-like power delivery ideal for demanding hard enduro terrain.
Key Features
- Optimised flywheel mass that greatly reduces sudden RPM loss, keeping the engine pulling in slow, technical sections.
- Noticeably stronger low-end and mid-range torque, allowing the engine to lug at lower revs with less clutch work.
- Trial-like engine character with smoother, more controllable throttle response for precise wheel placement.
- Improved traction on rocks, roots and loose terrain thanks to increased rotating mass and calmer power delivery.
- Helps reduce engine stalling in hard enduro situations such as steep climbs, switchbacks and obstacle crossings.
- Clutch-mounted design allows relatively quick installation and removal compared with ignition-side flywheel rings.
- Developed specifically for real hard enduro riding where fine control, grip and momentum are critical.
Technical Specifications
| Manufacturer | X-GRIP |
| Product name | X-GRIP TORQUE DISC (TORQUE KING) |
| SKU | XG-2638 |
| Product type | Clutch-mounted flywheel weight / torque disc |
| Disc weight (version XG-2638) | Light version – approximately 273 g added mass |
| Available weight variants (family) | Light ≈ 273 g (XG-2638), Heavy ≈ 310 g (separate part number) |
| Engine type | 250–300 cm³ two-stroke enduro engines (selected models) |
| Mounting position | On the clutch side, bolted to the clutch assembly |
| Primary function | Increase flywheel effect to smooth power delivery, increase torque and reduce stalling tendency |
| Typical riding discipline | Hard enduro, technical enduro, extreme off-road |
| Installation information | Supplied with model-specific mounting hardware and installation instructions |
Compatibility
The XG-2638 light TORQUE DISC is designed for the following two-stroke enduro motorcycles:
| Brand | Model | Year |
| KTM | EXC 250–300 | 2014– |
| KTM | XC 250–300 | 2014– |
| Husqvarna | TE 250–300 | 2016– |
| Husqvarna | TX 250–300 | 2016– |
| GasGas | EC 250–300 | 2021– |
| GasGas | EX 250–300 | 2021– |
The listed applications cover popular 250–300 cm³ two-stroke hard enduro platforms using the corresponding clutch and ignition -specific fitment should always match the manufacturer’s recommendations for the selected weight version.
Typical Use Cases
- Extreme and hard enduro stages with long, technical climbs where maintaining momentum at low RPM is crucial.
- Rock gardens, root fields and off-camber trails requiring maximum traction and precise throttle modulation.
- Slow, balance-intensive sections where a calmer, more predictable engine response reduces rider fatigue.
- Training and competition scenarios in which frequent stalling or wheelspin limits progress in difficult terrain.
- Riders seeking a more forgiving, torquey engine character without sacrificing overall power potential.
Installation and Setup Notes
- The torque disc is mounted on the clutch side with dedicated bolts, adding mass directly to the rotating clutch assembly.
- Correct torque values and tightening sequence for all fasteners are critical to ensure reliable operation.
- Clearance between the clutch pack, torque disc and clutch cover must be checked after installation.
- The modification is reversible; the original engine character can be restored by removing the disc if a more aggressive response is desired.
- For optimum results, the disc is typically used with standard engine internals and mapping, focusing the change on added flywheel effect rather than peak power.
