 How does it work?
The z-Start Pro Clutch is a centrifugal clutch that uses ball bearings to engage the clutch. The clutch provides a pressure plate with ball ramps. At idle the balls are at the bottom of the ramps and the pressure plate is disengaged. As the rider increases RPM, the balls move out the ramps, push on the Rekluse top plate and force the pressure plate into the clutch pack engaging the clutch. As RPM's build, the balls continue to move out fully engaging the clutch. When engine RPM's are reduced the balls drop back down the ramps and the clutch disengages.ï¿ The take-off is smooth as if you had perfectly feathered the clutch every time. The disengagement is quick eliminating stalls.
At what RPM does the z-Start Pro Clutch engage?
The z-Start Pro is fully adjustable so the rider can set the RPM engagement point. Springs are used to provide back pressure to the clutch and disengage it at idle. It takes a certain amount of force to overcome the spring and engage the clutch. By changing springs and spring compression rates, the rider can easily set the RPM engagement point.
For example, a light spring can be easily overcome at a low RPM so the balls generate enough force to compress the spring and engage the clutch. This provides a hard engagement at a low RPM which is ideal for enduro riding. A heavy spring requires more force to compress so it takes higher RPM to compress the spring and engage the clutch. This provides a soft engagement with some clutch slip which is ideal for track riding, allowing riders to brake slide into corners and accelerate out of them faster with better traction control.
Does the z-Start Pro require me to modify my existing clutch parts?
No. The z-Start Pro simply replaces your stock center clutch and pressure plate. No need to take apart the right side of your engine to get the whole clutch out. No need to send your parts away for permanent modification or to modify your existing clutch parts. With the Rekluse z-Start Pro, you can always return any bike to a stock configuration.
Can the clutch lever still be used?
The z-Start Pro is provided in a semi-automatic mode. A special spring and washer hold the stock throw-out to keep the lever taught when the bike is off or at idle. A unique benefit of the z-Start Pro is that it maintains a stock clutch lever feel and can be fully overridden at any RPM.
How difficult is the z-Start Pro to install?
Riders who regularly perform maintenance on their clutch components can easily install a z-Start Pro Clutch. Most people will spend 30 to 45 minutes to read through the manual completely and carefully install the z-Start Pro. After the first installation, subsequent installations can be completed in 15 to 20 minutes.
Why does the z-Start Pro include a new center clutch?
The Rekluse Center Clutch is one of the key design elements of the z-Start Pro. The Rekluse Center Clutch provides significant benefits over the stock cast aluminum center clutch:
- Fast and simple mounting of the z-Start Pro lower assembly by simply snapping it in with a snap ring no more mounting shims.
- Improved drive plate design utilizes a new drive plate tooth profile to reduce wear on the center clutch
- A replaceable, steel drive plate at bottom of the clutch pack reduces friction disk wear on the center clutch.
- Precision CNC machined from solid 6061 T-6 aluminum bar with a hard anodised coating
- Reduced run-out and improved parallelism means smoother engagement of clutch components
- Hard anodised significantly improves component life and reduces oil contamination
Will the z-Start Pro wear my clutch plates faster?
That depends on how you use or abuse the z-Start Pro Clutch. With the z-Start Pro, you will find that you are able to ride smoothly in one or even two gears higher than you normally ride. However, riding uphill, in 4th gear at 10mph for any extended period of time will cause significant clutch slipping, accelerate clutch plate wear and possibly damage your engine. When riding with any automatic clutch, it is important to select the right gear for the situation. In general, it is safe to ride one gear higher than the riding conditions dictate for short periods of time. That being said, when used properly the z-Start Pro should allow for clutch plate life equal to or better than a stock clutch.
What kind of maintenance does the z-Start Pro require?
The z-Start Pro Clutch is designed to work with a specific installed gap. The installed gap is the distance between the pressure plate and clutch pack when the bike is off. The installed gap is based on the distance that the balls rise in the ball ramps as the pressure plate is engaged. If the installed gap is too small, the pressure plate is too close and will cause the bike to drag at idle. If the installed gap is too large, the pressure plate cannot fully clamp the clutch pack and the clutch will slip excessively.
In order for proper operation and to maintain the life of the clutch pack, the installed gap must be kept in the prescribed range. Initially, the installed gap must be checked after breaking in the z-Start Pro Clutch for twenty minutes. As clutch wear occurs, the installed gap needs to be checked at regular intervals. Rekluse recommends riders check the installed gap after every 30 to 50 hours of riding.
How much weight does the z-Start Pro Clutch add to my bike?
Installing the z-Start Pro Clutch adds less than (TBA) ounces of rotating mass in the clutch. Keep in mind that the clutch spins at approximately 1/3 engine speed so flywheel effect of the z-Start Pro is minimal.
Can I use the Brake Kits with the z-Start Pro?
Yes you can, just remove the clucth lever in the normal way, however you cannot use the 2 Finger Over-Ride with a z-Start Pro. If you want a bar mounted brake, and retain the clutch, use a z-Start instead.
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Rekluse z-Start
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