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Rekluse z-Start
Pro Clutch FAQ |
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What is z-Start Pro Clutch?
The z-Start Pro Clutch is a retrofit automatic clutch for off-road
motorcycles and ATVs. It works using centrifugal force to automatically and
smoothly engage the clutch just by using the throttle. The z-Start Pro manages
the clutch function so the rider can focus on riding and having more fun.
The z-Start Pro is based on the same technology as Rekluse’s industry leading,
patented z-Start Clutch and provides all the same riding benefits plus some
additional unique benefits. The z-Start Pro provides stock-like clutch lever
feel, improved override at all RPM’s, simpler installation and reduced
maintenance. For more information on the differences between the z-Start Pro and
z-Start click this link: z-Start Pro versus
z-Start Comparison.
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What is included with the z-Start Pro Clutch?
There are two main portions of the z-Start Pro: a billet aluminum
center clutch and the clutch assembly. The billet aluminum center clutch
replaces the stock center clutch. The clutch assembly consists of the lower
assembly, pressure plate and top plate. The lower assembly simply snaps into the
Rekluse center clutch. The ball-ramp pressure plate with balls and a top plate
then mount to the lower assembly. The z-Start Pro also includes custom steel
drive plates to interface to the center clutch but utilizes standard OEM
friction plates. (Friction plates are not included in the kit.) Some models may
include a slightly thicker gasket to provide some additional clearance for the
z-Start Pro. Everything except basic tools is provided in the kit to complete
the installation.
What is the z-Start Pro made from?
The z-Start Pro Clutch is made from the highest quality billet 6061-T6
aluminum and billet 4140 steel, precision CNC machined to tolerances of .001"
(that's one one-thousandth of an inch). The center clutch and pressure plate are
hard anodized for additional durability.
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. 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.
What is the Rekluse Perch Adjuster?
The Rekluse Perch Adjuster is a device which mounts inline with the clutch cable
and mounts into the stock clutch perch. The Rekluse Perch Adjuster allows the
rider to externally adjust the engagement point of the z-Start Pro.
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 anodized coating.
Reduced “run-out” and improved “parallelism” means
smoother engagement of clutch components.
Hard anodization 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.
What if I have problems?
What kind of warranty does the z-Start Pro come with?
The z-Start Pro Clutch is backed by a 1-year warranty from defects in material
or workmanship on all Rekluse manufactured parts. The z-Start Pro Clutch also
includes a 30-day money back guarantee. If for any reason you are unhappy with
how the z-Start Pro Clutch performs in the first 30 days of use, simply contact
Rekluse or our dealer for a return authorization and we will gladly refund your
purchase. |
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International customers please read this:
In order to protect Rekluse's international distributors,
all dealers in the USA are prohibited from exporting
any Rekluse products. We can ship to any address in the United States, but we cannot ship these products
internationally. Please email
Support@Rekluse.com to find
the distributor serving your country. |
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