GS1000S

Succeeding its 750cc predecessor the 1000cc 4-stroke GS1000S set future of Suzuki,
a company formerly renowned for 2-stroke motorcycles.
Although the design was based on the Kawasaki ZI, the GS1000S is a motorcycle that oozes Suzuki’s original charm.

 
 

It was the cornerstone for the evolution of Suzuki’s highly successful GS series, which would prevail in countless races to come.

 
 

The BITO R&D tuned version of the machine that is said to be the origin of Suzuki’s “Big Bikes”, now truly lives up to its legend.

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JB Power - Special Racing Parts - BITO R&D

Development & Concept

The GS1000, an upscaled and optimized version of previous years GS750, Suzuki’s first large-displacement four-stroke model, was released in 1978. The engine design was based on the Kawasaki Z1 with a strong focus on improved reliability. It was subject to a multitude of extensive tests during development to the point when race legend Hideo Yoshimura, known as POP Yoshimura, stated that it has “Excessive Quality”. Starting with the Suzuka 8 Hours Endurance Road Race in 1978, the GS1000s was victorious in numerous races including the next year’s AMA Superbike and Daytona Superbike class.

Forty years later, while genuine parts have become scarce and customer demands are increasing, BITO R&D consequently responded with the development of the JB-POWER GS1000 complete machine. Installing ultra-light JB MAGTAN wheels and titanium exhaust reduced weight and significantly enhanced handling and chassis balance. The aged yet rock-solid powerplant was upgraded with JB big-bore forged aluminum pistons and a 35mm Flat-CR carburetor. JB-POWERs special frame reinforcement and rigid aluminum swingarm assist in dealing with the newly gained power. The JB-POWER GS1000 Complete Machine’s revised high-torque engine, revving smoothly from the low-end and a nimble, almost sport-bike like handling make its “Excessive Quality” all the more prominent.

Features

JB-POWER
MAGTAN JB4 3.00-18
Gloss Black
JB-POWER
MAGTAN JB4 4.00-18
Gloss Black
Sprocket 520-47
JB-POWER
Hand-Bend Titanium Exhaust System (4 into 1, Angled Megaphone Silencer)
JB-POWER KEIHIN
FCR Carburetor Φ35 Alumite
JB-POWER
Milled Aluminum Air Funnel (35mm, Stainless Steel Net)
JB-POWER
Aluminum Oil Catch Tank (Square Box Type)
JB-POWER
Cast Iron Front Brake Disc (Φ320mm, 6POT)
Radial Mount Brake Caliper 6POT (Brake Pads Included)
Milled Aluminum Radial Brake Caliper Bracket
GOODRIDGE
Stainless Mesh Hose
EARL’S
Stainless Fittings
JB-POWER
Milled Aluminum Fork Bridge (Φ38, 45mm Offset, Black Anodized)
Milled Aluminum Ignition & Meter Bracket
JB-POWER
Throttle Wire Set
Handle Bar (Black)
Handle Bar End (Black)
AP-RACING
Brake Master Cylinder CP3125-2 (Switch included)
JB-POWER
Rear Floating Kit (Cast Iron Disc Φ250mm, CP2696 Caliper…)
JB-POWER
Special Tuned Engine
Displacement 1,144cc
75mm x 64.8mm
Compression Ratio 11.0:1
Forged Aluminum Piston Kit
Cylinder Liner
Liner exchange, Boring, Upper Case Boring
Special Head Porting
Crank Shaft Center Alignment
WPC Coating (Transmission)
Black Powder Coating
JB-POWER KYB
Special Front Fork Φ38mm (Total Length 815mm, Silver Bottom)
JB-POWER
Hollow Chromoly Front Axle Shaft (Φ17mm)
JB-POWER
Milled Aluminum Riding Step Kit (90mm Rear, 25mm Up, Black Anodized)
JB-POWER KYB
Rear Suspension (With Tank, Total Length 340mm)
JB-POWER
Milled Aluminum Head Light Bracket (Φ38mm, Black Anodized)
JB-POWER
Hollow Chromoly Rear Axle Shaft (Nut Included)
JB-POWER
Seat Cover Exchange and Foam Modification
JB-POWER
Aluminum Swing Arm (Square Chain Tensioner, Black)
JB-POWER
Milled Aluminum Number Plate Holder (Black Anodized, Japanese Numberplates Only)
JB-POWER
Oil Cooler Kit 13 Row (Below Tank, Fitting, Hose, Adapter, Bracket) [Only available as in-house installation!]
JB-POWER
Special Frame Reinforcement (Lay Down included)
JB-POWER
Milled Aluminum Engine Mount Set (Black)
Chormoly Engine Mount Bolts (Front Top & Rear Top)
JB-POWER
Hollow Chromoly Pivot Shaft (Nut Included)
JB-POWER
Milled Aluminum Racing Stand Hook (Black Anodized)
DUNLOP
SPORTMAX α-14
110/80ZR18
DUNLOP
SPORTMAX α-14
150/70ZR18
D.I.D
Gold Chain 520
JB-POWER
Hand-Bend Titanium Exhaust System (4 into 1, Angled Megaphone Silencer)
JB-POWER
MAGTAN JB4 3.00-18 Semi-Gloss Black
Cast Iron Brake Disc
Radial Mount Caliper
Caliper Bracket
Hollow Chromoly Front Axle Shaft
GOODRIDGE
Stainless Mesh Hose
EARL’S
Stainless Fitting
DUNLOP
SPORTMAX α-14 (110/80ZR18)
JB-POWER
MAGTAN JB4 4.00-18 Semi-Gloss Black, 520-47
Rear Floating Kit (Φ250, CP2696…)
Aluminum Swing Arm
Racing Stand Hook
Hollow Chromoly Rear Axle Shaft
Chromoly Rear Axle Nut
DUNLOP
SPORTMAX α-14 (150/70ZR18)
D.I.D
Gold Chain 520
JB-POWER
Special Tuned Engine
Displacement 1,144cc
Compression Ratio 11.0:1
Forged Aluminum Piston Φ75mm
Cylinder Liner
Liner Exchange, Boring
Special Head Porting
WPC Coating (Transmissin Parts)
Aluminum Air Funnel 35mm
Oil Cooler Kit 13 Row (Black)
Engine Mount Set (Black)
Chromoly Engine Mount Bolt
JB-POWER KEIHIN
FCR Carburetor Φ35 Alumite
JB-POWER
Oil Catch Tank (Square Box Type)
Riding Step Kit
Hollow Chromoly Pivot Shaft
Special Frame Reinforcement
AP-RACING
Brake Master Cylinder CP3125-2
JB-POWER
Fork Bridge Set (Black, Offeset 45mm)
Ignision and Meter Bracket
Head Light Bracket (Black)
Handle Bar (Black)
Handle Bar End (Black)
JB-POWER KYB
Front Fork Φ38mm (Silver Bottom)
JB-POWER KYB
Rear Suspension (With Tank)
Seat Cover Exchange, Foam Modification
JB-POWER
Number Plate Holder (Black)

SPECS

Exhaust
JB-POWER Hand-Bend Titanium Exhaust System
(4 into 1, Angled Megaphone Silencer)
¥330,000
Wheels
JB-POWER MAGTAN JB4 F3.00-18, R4.00-18
Semi-Gloss Black 520-47
¥350,000
Carburetor
JB-POWER KEIHIN FCR Carburetor Φ35 Alumite
¥204,000
Carburetor
JB-POWER Milled Aluminum Air Funnel FCR 35mm
(Stainless Steel Net / x4)
¥7,500
Carburetor
JB-POWER Aluminum Oil Catch Tank
(Square Box Type)
¥18,000
Brakes
JB-POWER Cast Iron Front Brake Disc
(Φ320mm, for JB-6POT / CP2696 / x2)
¥75,000
Brakes
JB-POWER Radial Mount Brake Caliper 6POT
(Brake Pads Included / x2)
¥98,000
Brakes
JB-POWER Milled Aluminum Radial Brake Caliper Bracket
(for JB Radial Mount Caliper / x2)
¥25,000
Brakes
AP-RACING Brake Master Cylinder CP3125-2
(Switch included)
¥69,000
Brakes
GOODRIDGE Stainless Mesh Hose
EARL'S Stainless Fittings (x2)
¥11,000
Brakes
JB-POWER Rear Brake Kit
(Cast Iron Disc Φ250mm, CP2696 Caliper...)
¥184,600
Engine
JB-POWER Special Tuned Engine
(Displacement 1,144cc, Compression Ratio 11.0:1)
Please Ask
Engine
JB-POWER Forged Aluminum Piston Kit Φ75mm
¥135,000
Engine
JB-POWER Cylinder Liner (x4)
¥9,500
Engine
JB-POWER Liner Exchange, Boring
¥100,000
Engine
JB-POWER Special Head Porting
¥80,000
Engine
JB-POWER Crank Shaft Center Alignment
¥25,000
Engine
WPC Coating
(Transmission Parts)
¥44,000
Engine
JB-POWER Oil Cooler Kit 13 Row (Fitting, Hose, Adapter, Bracket)
[Only available as in-house installation!]
Please Ask
Suspension
JB-POWER KYB Special Front Fork Φ38mm
(Total Length 815mm, Silver Bottom)
¥130,000
Frame parts
JB-POWER Hollow Chromoly Front Axle Shaft (Φ17mm)
¥19,000
Frame parts
JB-POWER Milled Aluminum Fork Bridge
(Φ38, Offset 45mm, Black Anodized)
¥155,000
Frame Parts
JB-POWER Milled Aluminum Ignition and Meter Bracket
¥20,000
Frame parts
JB-POWER Milled Aluminum Head Light Bracket
(Φ38mm, Black Anodized)
¥30,000
Frame parts
JB-POWER Handle Bar (Black)
¥8,000
Frame parts
JB-POWER Milled Aluminum Handle Bar End
(Black Anodized / x2)
¥3,000
Suspension
JB-POWER KYB Rear Suspension
(With Tank, Total Length 355mm)
¥75,000
Frame parts
JB-POWER Milled Aluminum Riding Step Kit
(Black Anodized, 90mm Rear, 25mm Up)
¥70,000
Frame Parts
JB-POWER Special Frame Reinforcement
(Lay Down included)
¥150,000
Frame parts
JB-POWER Milled Aluminum Engine Mount Set (Black) +
Chormoly Engine Mount Bolts (Front Top & Rear Top)
¥50,000
Frame parts
JB-POWER Aluminum Swing Arm
(Square Chain Tensioner, Black Powder Coating)
¥180,000
Frame parts
JB-POWER Milled Aluminum Racing Stand Hook
(Black Anodized)
¥10,000
Frame parts
JB-POWER Hollow Chromoly Pivot Shaft
(Nut Included)
¥15,000
Frame parts
JB-POWER Hollow Chromoly Rear Axle Shaft
(Nut Included)
¥15,000
Exterior
JB-POWER Seat Cover Exchange and Foam Modification
¥50,000
Exterior
JB-POWER Milled Aluminum Number Plate Holder
(Black Anodized, Japanese Numberplates Only)
¥16,000
Tires
DUNLOP SPORTMAX α-14
(110/80ZR18,150/70ZR18)
Please Ask
Drive Train
D.I.D Gold Chain 520
Please Ask

Engine Power

45%

Total Dynamic Weight Reduction Effect

82%

Cornering

80%

Brakes Performance

89%

Comfort

85%

Total

76.2%