This CL MotoTech Yamaha RD400 shock kit is a complete adaptation of the standard RFY shock for the Yamaha RD400. It features eyelet style mounting with the correct bushings for both the top and bottom mounts. The kit features a 100lbs/inch spring and an overall center to center length of 340mm. This package is tuned to work for most riders in most conditions. As with all CL MotoTech builds, you have your choice between Maxima 3 weight, 7w, and 10w oil. The shock is then charged with nitrogen to assure consistent and reliable performance
About The Shock
The shock itself is a modified and serviced RFY shock body and piston. The body is lightweight aluminum with adjustable preload. The piston and shaft are of steel construction. The piston is of a deflective disk design and can be tuned via shim stack adjustment, oil weight change, and reservoir pressure. An important feature of the package is the reservoir which allows for the pressurization of the shock which promotes consistent performance even in extreme environments. The entire package with springs weights around 10lbs. total and offers significant weight savings over stock and steel bodied units.
- Maxima shock fluid provides known damping properties
- Purge air from damper system providing consistent performance throughout suspension travel
- Proper bladder pressurization with purpose built tool means precise control of damping characteristics (standard tire gauges do not work for setting this pressure as the bladder volume is too small!)
- Proper pressurization reduces oil cavitation and keeps the damper working consistently no matter how long or far you ride
- The use of pure nitrogen eliminates moisture in the system while providing greater temperature stabilization compared to air
- Apply friction reducing seal grease ensures smooth damper operation and longer seal life
- Additionally, top out spring replacement is available, see below for details
Top Out Spring Replacement and Preload Correction
Top out spring replacement removes the overly stiff and excessively tall factory spring. This accommodates greater travel in the sag component of your suspension travel. The replacement spring decreases the droop limit, meaning the shock has a longer travel than stock. Ultimately, this allows the setup of the shock to be maximized in both the compression and sag characteristics. Preload correction is applied in conjunction with the top out spring replacement and serves to reduce factory set preload as much as possible. This is ideal for lighter bikes and riders who may struggle to achieve popper sag. Note: this service may add up to 10mm to the total length of the shock.
Spherical Bearing Conversion
- Reduces misalignment forces on the shock piston and shock rod linear bearing
- Increases shock sensitivity
- Lessens fiction and wear on shock components
- Less rotational friction that results in smoother action of the suspension
- Removes free play or slop common with rubber lined mounts
- Easily changed when worn
- A more professional and clean aesthetic
- Extremely long life with proper maintenance
If you are uncertain on oil weight, generally speaking 7w is the best choice.
In most cases you will receive your order within 14 days of purchasing.
Do you have questions about this purchase? Visit the FAQ page.
Note: Due to the wide variety of colors, sizes, and mounting option I may not always have some configurations in stock.