Setting the Standard: KAWASAKI Z1-R Custom by BULL DOCK

• Z1-R

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BULL DOCK's Z1-R

BULL DOCK's full custom GT-Ms always reflect the latest specifications of the time they are made, and the same is true of this Kawasaki Z1-R, created as a demo bike and the very first GT-M. The owner is Mr. Wakui of BULL DOCK himself, and this bike also reflects the future of their GT-M customs.

As you can see, the base of this custom is the Z1-R, and this is where we would like to focus our attention this time. BULL DOCK works on all different Z series bikes, from the Z1 to Z1000 with their round tanks, the square tank Z1000Mk.II and Z750FX, and of course the later Z1000J/R models. So, why was the Z1-R chosen? Mr. Wakui explains the reason as follows.

"I just like the Z1-R. I like all Zs of course, but the Z1-R is the most difficult to customize, so I feel a great sense of accomplishment when I complete a customization. Let's say you want to customize your Z1-R. Even if you make some quick modifications here and there, it will still look like stock. It's difficult to exceed the original build because the Z1-R itself was originally a custom made by the manufacturer. With the Z or Mk.II, a short pipe exhaust, carburetor, oil cooler, and new wheels would be enough to make it a custom. In the case of the Z1-R, that's not enough. Unless you don't just change individual parts but also consider the entire bike as a whole it won't look good or like a custom bike. The same is true for the ride quality; if you don't do the right things, it won't run well, and I find that challenge worthwhile. The single seat, which is a key point for exterior customization, was first made to look good on the Z1-R, and from there we made one for each Z model."

This Z1-R is beautifully executed as a custom bike. One of the goals when building a GT-M is "to make a bike that could pass for an original model", and that level of perfection can be seen in the ease of use, rideability, and natural appearance of this amazing GT-M custom.

Handle

The gauges are a combination of a needle type engine tachometer + multifunction digital gauge and fuel gauge on an original 3D sculpted carbon panel with a STACK meter. The front brake master cylinder and hydraulic clutch master cylinder are both GALE SPEED Elaborate. The stem is a Mccoy by BULL DOCK, which provides the necessary amount of trail for 17-inch wheels. A compact HYPERPRO Steering Damper is also mounted on the steering head.

Bodyworks

The bikini cowl/windshield and single seat (the seat itself is a Mccoy Supreme, which maintains comfort and quality even at this size), and aluminum tank are BULL DOCK Mccoy, and the mirrors are carbon by Magical Racing.

Engine

The engine is a 1230cc spec with Pistal Racing forged pistons and Extra Super Tarkalloy sleeves (154ps/8000rpm spec at the time of the photoshoot, it has now been increased to 1260cc with a φ78mm bore). The cylinder head is from a Z1000J and twin plugs are used. A Mccoy 6-speed Cross Transmission was installed, and the power generation/ignition system was also originally made. The engine moves the 184kg dry weight of the bike nimbly, and the exterior has a stylish finish.

Intake & Exhaust

The carburetor is a YOSHIMURA TMR-MJN φ40mm with dual stack funnel specs. The oil bypass line to the cylinder head can also be seen in this photo.

The full titanium exhaust is a Win Mccoy Neo optimized for the Z. The front and rear wheels are BST Carbon 3.50-17/6.00-17 size, the front forks and rear shocks are both collaborations of Mccoy and NITRON, and the pentagonal reinforced swingarm is a Mccoy original, giving this bike the full package.

Chassis

The step kit is also a Mccoy design optimized for the Z series. The chainline has also been optimized with outboard and offset sprockets.

Gallery

Specifications

Part	Details
Engine	PISTAL RACING φ78mm Forged Piston BULL DOCK Mccoy 6-speed Cross Transmission
Carb / Intake	YOSHIMURA MIKUNI TMR-MJN φ40 Carburetor YOSHIMURA Dual Stack Funnel System Basic Kit for TMR YOSHIMURA Original Aluminum Funnel for TMR/MJN
Exhaust	BULL DOCK Win Mccoy Neo Full Exhaust
Frame	BULL DOCK Mccoy Stem Kit (Upright φ43mm, Lightweight Racing Type/Steering Damper Compatible) BULL DOCK Mccoy Swingarm
Brake	GALE SPEED Elaborate Master Cylinder [VRE Series] Brake Master brembo Racing Radial CNC 4P Caliper MCCOY x SUNSTAR Collaboration φ320mm Omega Disc brembo GP2-SS CNC 2P Caliper SUNSTAR Works Expand Rear Disc
Wheels	BST Black Diamond Slanted 5-spoke Front Wheel 3.50-17 BST Black Diamond Slanted 5-spoke Rear Wheel 6.00-17
Suspension	MCCOY x NITRON Front Fork MCCOY x NITRON Stealth Twin R3 Rear Suspension
Steps	BULL DOCK Mccoy Rearsets TYPE II
Drive System	BULL DOCK Mccoy Offset Sprocket Outboard Kit RK 520XXW Drive Chain
Handle / Steering	BULL DOCK Mccoy Clip-on Handlebars GALE SPEED Elaborate Master Cylinder [VRE Series] Clutch Master Magical Racing NK1 Mirror TYPE-1 Parts Shop K&W Moto Gadget Motoscope Mini Digital Speedometer 1 STACK ST700SR Stack Timer Dash System Base Kit STACK ST3000 Universal Meter YOSHIMURA Digital Multimeter HYPERPRO Steering Damper
Seat	BULL DOCK Mccoy Supreme Seat
Bodyworks	BULL DOCK Mccoy Front Cowl BULL DOCK Mccoy Aluminum Tank BULL DOCK Mccoy Dry Carbon Front Fender BULL DOCK Mccoy Carbon Rear Inner Fender
Electrical	BULL DOCK Mccoy Dynamo / One-way Clutch Kit

About BULL DOCK

A motorcycle customization and tuning store focused on the Kawasaki Z series. The "Mccoy Series" is the original parts developed by BULL DOCK in pursuit of further performance for the complete machines. Each and every one of these parts is manufactured with a strong sense of commitment.

BULL DOCK brand page

Original Source of this Article

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