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Unbreakable and Safe Specification Z: Z1 Custom

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 7 min read

PLEASURE's Z1 [900SUPER4]

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The base model is a '75 Z1B, quite old but remodeled to be safe to ride. The engine is based on the stock specs, with new cylinders and sleeves. The other parts were replaced. For exmaple, the crankshaft was bent, and the frame was reinforced by Mr. Ito of Borg Motorcycle, who has many years of experience in this field. The swingarm is also 30mm longer than the stock one.

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The rear shocks were shortened by 20mm because the footprint was not quite right. In addition, the rear wheel is positioned slightly further back, resulting in a longer overall length. The inside of the stock cast clutch cover was cut to fit a release for hydraulic drive, and the Yoshimura short pipe was modified to avoid interference with the swingarm. That was rewelded and mounted on the frame's main stand mount. The Brembo calipers were also painted black, daring to avoid the look of recent bikes while enhancing performance.

Electrical

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The headlight (CIBIE body), meter light, and other lights are fully LED for modern functionality. The left and right master cylinders are made by GALE SPEED.

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The meters were overhauled by Craftsbee for a perfect repair. handlebar is Active medium type. And stem is JB-POWER with 40mm offset.

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The taillight and blinkers (replaced with small/white lens version made by POSH) are also LED. The fender eliminator kit is made by PMC.

Bodyworks

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The seat is a one-off saddle type. The fuel tank is made by Doremi Collection. The black and gunmetal fireball pattern paint gave something significant to the bike.

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The steps are made of steel tubing manufactured by Borg Motorcycle, avoiding the sharpness of the machining and silver color.

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The sprocket cover is a standard casting, and the inside is machined and fitted with a universal release made by K-Factory for hydraulic drive.

Engine

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Based on a 1975 model, the engine was overhauled using 0.5mm oversized pistons and crankshaft alignment. The exterior was also refinished with gun coating. The frame was reinforced in four places by Borg Motorcycle, and a pillion step was added.

Intake & Exhaust

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The CR Special Φ29mm is used in combination with a K&N power filter. And the battery was updated to SHORAI lithium-ion.

Chassis

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JB-POWER KYB Special Φ38mm front forks and Brembo CNC 4 piston front brake calipers are installed, but gun coated in black to avoid looking too modern.

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Brembo CNC rear brake calipers are installed and finished in black. The caliper support is an one-off. And Sunstar trad brake discs were installed.

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The Borg Motorcycle swingarm is extended by 30mm, and a Nitron Stealth 20mm shortened rear shock improves stability and looks. JB-POWER Magnesium Forged JB1 2.75-18/4.00-18 wheels are installed.

Gallery

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Specifications

Part Details
Engine K-FACTORY Clutch Release F TypeⅡ
Carb / Intake KEIHIN CR Φ29 Carburetor
Frame BORG CUSTOM MOTORCYCLE Swingarm 40mm One-Off
Brake GALE SPEED Brake Master Cylinder VRC Series
Brembo P4-40RB CNC Brake Caliper P4 30/34 40mm
SUNSTAR Front Brake Disc Trad Type
Brembo Rear CNC Caliper P2 34
SUNSTAR Rear Brake Disc Trad Type
Wheels JB-POWER Forged Magnesium Wheel JB1 2.75-18
JB-POWER Forged Magnesium Wheel JB1 4.00-18
Suspension JB-POWER KYB Special Φ38mm Front Fork
NITRON Rear Suspension Twin Shock STEALTH TWIN R1 Series for Lowering
Steps BORG CUSTOM MOTORCYCLE Rearsets Kit
Handle / Steering JB-POWER Fork Bridge
GALE SPEED Clutch Master Cylinder VRC Series
ACTIVE Handlebar Mid Type
Seat Saddle Type Seat One-Off
Bodyworks PMC Fender Eliminator Kit
DOREMI COLLECTION Steel Tank Set Painted Base
Electrical AS Uotani SPII Full Power Kit
SHORAI BATTERY Lithium Ion Battery

About PLEASURE

PLEASURE provides dress-up parts for KAWASAKI models. Best for ZZR1400, NINJA250R, or NINJA400R!
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PLEASURE brand page

Original Source of this Article

Heritage & Legends

Hakuyo
Hakuyo

editor

Hakuyo

A foreigner who rides in Japan, Japanese call this "Gaijin Rider". Third year in the Webike global team. He feels and shares the real bike life in Japan then presents you how interesting Japanese customs are.

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