A high-performance, stall-preventing auto clutch is just a clutch pack swap away. RadiusX combines TorqDrive friction disk technology with next-generation EXP 4.0 auto clutch disk functionality. Paired together, TorqDrive clutch disks and EXP 4.0 deliver stronger power delivery, improved clutch durability, and rider-focused, auto clutch functionality, all in the framework of a drop-in clutch pack. EXP 4.0 prevents engine stalling so riders can focus on their line and let the clutch do the rest, while TorqDrive provides increased power transfer and durability over OEM. Each RadiusX kit also includes Rekluse basket sleeves, protecting OEM baskets from notching. This latest generation RadiusX clutch kit from Rekluse is the perfect choice for riders looking for unmatched clutch functionality within the convenience of a clutch pack.

• Eliminates stalling, start and stop without engaging the clutch lever
• Increased power transfer over OEM
• On the fly external adjustment
• Allows riders to run a gear taller, letting the suspension work better and saving energy
• TorqDrive clutch pack provides longer clutch life with less adjustment over time

What Changes were made with EXP 4.0 from EXP 3.0?

First, the base material used for EXP 4.0 has been updated to provide better strength in high temperature environments, critical for the heat clutch systems create. Next, the internal wall of EXP 4.0 bases were redesigned for strength and rigidity, which helps translate to a more connected lever feel for the rider.

On the outside of the EXP disk, riders will notice the friction pads now match the proprietary friction design found on Rekluse TorqDrive clutch plates. Applying this friction pad design helps match oil flow characteristics of the clutch pack beneath, promoting improved cooling capability and consistent operation.

The ‘wedges’ are a critical component to the centrifugal functionality of EXP 4.0. In the previous iteration, the wedges would slide up and down ramps built into the EXP bases to engage and disengage the clutch. EXP 4.0’s wedge has been improved to now use rolling contact with built-in pins. Rolling versus sliding creates less friction and resistance, providing smoother engagement and a more responsive feel, creating stronger power delivery overall.

The wedge and ramp design of EXP 4.0 has been improved with rolling action vs. sliding, creating less friction and resistance for more direct power delivery and smoother engagement.

Not only is engagement smoother and more responsive, but the engagement curves of EXP 4.0 have been designed to better match the engine characteristics of modern motorcycles. Improved tuning options play a role in this as well, as riders now have the option to set up their EXP 4.0 with a combination of light, medium and heavy wedge weights in addition to having multiple EXP disk spring options as they did with 3.0. This creates much more potential for riders to optimize their clutch and engine characteristics based on riding conditions. However, if you’re a rider that likes load-up and go, EXP 4.0 comes with recommended settings out of the box.

EXP 4.0 will be featured in all new RadiusX and RadiusCX auto clutch kits going forward, and will also be retrofitted to those same kits as they are restocked for existing models. Any riders that currently have a Rekluse auto clutch system with EXP 3.0 can quickly and easily upgrade to EXP 4.0 with a simple disk swap and adjustment check.

Summing it Up: Rekluse EXP 4.0 Auto Technology Benefits

• More direct power delivery, improved durability, and rider-focused functionality
• Upgraded base material providing improved strength at high temperatures
• Revised base design improving strength and rigidity, translating to more connected lever feel
• Improved wedge design with pins allows for rolling instead of sliding to expand the disk, creating a more responsive feel and smoother engagement
• TorqDrive friction pad design matches revised oil flow characteristics
• Engagement curve designs updated to better match modern motorcycle engine characteristics
• More tuning options with varying wedge weights and EXP springs