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An American Rider’s Passionate: GSX1000S Katana Custom

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 7 min read

Sanctuary's GSX1000S KATANA

Today we bring you a full custom machine that was exhibited at the 2022 Tokyo Motorcycle Show.

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The base model is a GSX1000S Katana which was owned by an American rider who used to ride it when he was young. Sanctuary staff went to the US, then received the body at RCM USA Inc. in LA, disassembled it locally, and shipped only the necessary parts to Japan for production. This epic build has crossed the Pacific Ocean and taken three years to complete.

Engine

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Big bored to 1,135cc, the eternal standard for the Katana. The engine was overhauled and tuned based on the original GSX1000S. Other than a Yoshimura ST-1 camshaft and lightweight cam sprockets, the rest of the work was focused on overhauling the engine.

Intake & Exhaust

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The full titanium exhaust made by Nitro Racing is a custom-ordered version of the already discontinued GSX1000S Katana with an additional 4-2-1-2 dual exhaust.

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Although the cost was quite high, the owner's requirements were given top priority.

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Yoshimura TMR-MJN Φ40mm Carburetor.

Chassis

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The chassis is designed with 17-inch wheels both front and rear, and the parts used come from only the world's top manufacturers. Ohlins suspension, O-Z racing wheels and Brembo brakes. There is no room for lack of quality at the moment of choosing the components, as with so many supercars and bikes from high-end manufacturers.

Bodyworks

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The hand fabricated fuel tank is built from aluminium; this provides a more slender look and considerable weight saving.

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The front fender and the rear hugger are both carbon pieces. The side covers, radiator end caps, and seat are designed, fabricated, and finished in-house, with utmost determination. The belly pan is a modified Nitro Racing air-cooled Z cover.

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The unique Katana styling is retained and features carbon fiber winglets, LED square headlights and that unmistakable mini screen.

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The gauges are a one-off plate combination of a tachometer and oil temperature gauge made by Stack, which has an established reputation for reliability. The Ohlins steering damper is machined from duralumin and installed with a single fabrication bracket.

Gallery

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Specifications

Part Details
Engine 1,135cc
YOSHIMURA Camshaft [ST-L1]
Bore 74.0mm
Piston 66mm
Carb / Intake Mikuni Yoshimura TMR MJN 40Ф Carburetor DSF
Exhaust NITRO RACING Weld Titanium Full Exhaust with Custom-made Twin Tails
NITRO RACING Grenade Titanium Silencer Version 3
Frame SCULPTURE 17 Inch Exclusive Wide Swingarm Silver
Stabilizer Addition Welding Racing Stand Hooks
Brake Brembo CNC Radial Mount Brake Caliper Kit P4 32 / 32 108mm GP4 RX Left & Right Set
Brembo 19RCS Radial Brake Master Cylinder
DirtFreak ZETARCM Concept Flight Lever
RCM Concept Ф320 Hole & Slit
NITRO RACING Ohlins Multi Caliper Support Kit Radial Mount Spec.
Wheels OZ Racing GASS RS-A Forged Aluminum Wheel
Suspension OHLINS Upright Front Forks ExM Package
OHLINS Rear Suspension Ground-Twin
Steps GALE SPEED Foot Control Kit LIGHT
GALE SPEED Rear master Cylinder Mounting Bracket(Under development)
Drive System SANCTUARY EK & NOBLEST 530 RCM Chain (BK / GP)
(Front) 530-18 /15mm Offset Sprocket
SUNSTAR Rear Sprocket Duralumin
Handle / Steering SCULPTURE Φ43 Stem Kit Type3
Daytona Clips-on (RCM concept grip end)
NITRO RACING Clutch Plate Black
KOHKEN Mechanical Clutch Lever
Oil Cooler NITRO RACING NITRO RACING EARL'S Oil Cooler Kit
Seat Single seat processing for Cleverwolf R-1
Bodyworks Type Racing Front Fender
Rear Fender Eliminator Kit One-off
NITRO RACING Rearsets
OHNO-SPEED Takumi windshield
Electrical AS Uotani SPII Full Power Kit

About SANCTUARY

SANCTUARY is a custom builder that is good at Vintage motorcycles like Z1,Ninja and KATANA. They sell special parts which were born from trial and error that mechanics had repeated mounting and testing

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SANCTUARY brand page

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.