English 
Japanese 
The JB/KYB φ38 Special Front Fork was developed for the air-cooled ’70s to ’80’s superbikes and other literbikes. Its high rigidity obtained though a high- strength ultra-thin inner tube and the excellent spring and damping characteristics that are based on BITO R&D’s extensive proprietary knowledge make it an ideal suspension for street use. The separately available extension kit allows making height adjustments that are essential for race users or custom bikes.
The JB/KYB φ38 bottom is available in gloss black and silver to fit your motorcycle.
The inner tube is chrome plated, however, if you are looking for something different please get in touch.
Two different base lengths and the separately available JB-POWER extension kits allow making
height adjustments that are essential for race users or custom bikes.
Total Length：750mm
Stroke：130mm
Caliper Mount Pitch：72mm
Including Preload Adjuster
Oil：KYB#10
Oil Quantity：250cc
Oil Level：136mm
Total Length：774mm
Stroke：130mm
Caliper Mount Pitch：72mm
Including Preload Adjuster
Oil：KYB#10
Oil Quantity：250cc
Oil Level：136mm
Total Length：805mm
Stroke：130mm
Caliper Mount Pitch：72mm
Including Preload Adjuster
Oil：KYB#10
Oil Quantity：285cc
Oil Level：125mm
Total Length：829mm
Stroke：130mm
Caliper Mount Pitch：72mm
Including Preload Adjuster
Oil：KYB#10
Oil Quantity：285cc
Oil Level：125mm
The JB/KYB φ41 Special Front Fork has a 12-step adjustment for rebound and compression damping and a preload adjuster. The BITO R&D special tuned cartridge-type damper unit realizes a supple and elastic suspension setting. A separately available extension kit allows chassis height adjustments. It can be installed on the GPZ900R (A7 – A11) without modification.
(* The top of the genuine separate handle needs to be machined to install the JB/KYB φ41 Special Front Fork)
We offer the JB/KYB φ41 bottom in the same colors as its φ38 sibling in gloss black and silver
to fit your motorcycle and choice of inner tube coating.
The inner tube is available in TiN coating or chrome-plated, however, if you are looking for
something different please get in touch
Total Length：813.5mm
Stroke：130mm
Caliper Mount Pitch：62mm
Damping: Compression/Rebound
12 Step (Cartridge Damper)
Including Preload Adjuster
Oil：KYB#10
Oil Quantity：412cc
Oil Level：147mm
Total Length：836.5mm
Stroke：130mm
Caliper Mount Pitch：62mm
Damping: Compression/Rebound
12 Step (Cartridge Damper)
Including Preload Adjuster
Oil：KYB#10
Oil Quantity：412cc
Oil Level：147mm
This JB/KYB Rear Schock Absorber was developed to perfectly suit literbikes and the air-cooled ’70s to ’80’s superbikes and provides a particularly exquisite balance when combined with the JB/KYB φ38 Special Front Fork. A separately sold Torque Rod Extension Kit is available for models where the genuine brake system would collide with JB/KYB Rear Shock Absorber.
Total Length：389mm
Pitch：353mm
Stroke：75mm
Frame Mount Eye：φ14mm
Swingarm Mount Eye：φ14mm
Damping: Compression/Rebound 4 Step
(Cartridge Damper)
Including Preload Adjuster (Range: 35mm)
Z1000J/R (Torque Rod Extension Kit necessary!)
Z1100R
Z1/Z2
ZEPHYR750
ZEPHYR1100
Z1000MK-II (Caliper position needs to be changed!)
Z1100GP (Caliper position needs to be changed!)
Total Length：374mm
Pitch：340mm
Stroke：75mm
Frame Mount Eye：φ14mm
Swingarm Mount Eye：M10
Damping: Compression/Rebound 4 Step
(Cartridge Damper)
Including Preload Adjuster (Range: 35mm)
Total Length：398mm
Pitch：368mm
Stroke：105mm
Frame Mount Eye：φ14mm
Swingarm Mount Eye：φ14mm
5 Step Preload Adjustment
Our skilled engineers perform full overhauls, oil, or seal changes for various JB-POWER suspensions types like the JB/KYB φ38 Front Fork.
Additionally, we offer a broad variety of spare parts that are usually in stock, please get in touch if you have any questions.
