sr400_01.jpg BIKES
PICK UP
BIKES

In Pursuit of Perfection: Yamaha SR400 Custom by NINE GATE

 8 min read

NINE GATE's SR400

sr400_01.jpg

NINE GATE is known for their comprehensive performance enhancements that consider not only speed but also comfort and the joy of riding. Presented here is a high-tech machine that showcases the meticulous workmanship of the shop in every aspect. Originally customized by Thruxton, this machine embodies the concept of 'visuals and performance that stand the test of time,' evolving from the universally popular cafe racer style common with SR customs to a high-performance machine that rivals current sport models.

sr400_02.jpg

First, let's start with the engine. Initially a 595cc engine, the builder, Mr. Hosoi, downsized it to 534cc, which he describes as the "most enjoyable and long lasting displacement for the SR." Despite the reduction in displacement, meticulous tuning, including cerakote coating in the combustion chamber and piston crown area, resulted in a peak output of 48.6PS. Considering that the current SR model has a maximum output of 24PS and the famed SRX600 Big Single Racer produces 42PS, you can see how exceptional this figure is. Furthermore, the overall uneven performance, such as overly strong brakes and stiff suspension, has been rectified to be more rider-friendly through maintenance and modification of each component. While maintaining its speed, the machine was refined to be stress-free to ride. It's not just about being fast or looking cool but it must also be comfortable, safe, and enjoyable to ride. It may seem like common sense, but by pushing this common sense to the limit and achieving it at a high level, a high-quality machine that won't lose its shine even after 10 years is born... This gem flawlessly embodies the builder's sincere custom philosophy, diligently realizing it to perfection.

Handle

sr400_04.jpg

The handlebars are made by SANSEI and the top bridge is made by BORE ACE. At first glance, it looks high-tech, but the stock gauges are used as the base, giving it an SR-like appearance.

Bodyworks

sr400_03.jpg

The front cowl is made by Thruxton, and the bracket is a one-off fabrication. An LED headlight for a Harley is used to provide sufficient light.

sr400_06.jpg

The bold yet simply designed undercowl is made by Thruxton, giving the machine a distinctly racer-like look.

sr400_07.jpg

The seat cowl is an original from Thruxton, which gives the rear area a sense of speed. Maintaining the racer-like appearance, it can also accomodate a pillion passenger, which is a notable highlight.

Chassis

sr400_05.jpg

The brakes are equipped with Brembo 4-Pot calipers paired with SUNSTAR 320φ rotors, significantly enhancing stopping power. The wheels have been replaced with 17-inch MAGTAN, reflecting a serious commitment to performance.

sr400_08.jpg

Brembo 2-Pot calipers and a GALE SPEED master cylinder have been installed, transforming the rear to a disc brake using all aftermarket parts.

sr400_09.jpg

The swingarm is by OVER, and the wheels have been swapped to 17-inch MAGTAN. With high-grip S20EVO tires, it creates a high-spec suspension for full-scale sports riding.

Gallery

sr400_01.jpg sr400_02.jpg sr400_03.jpg
sr400_04.jpg sr400_05.jpg sr400_06.jpg
sr400_07.jpg sr400_08.jpg sr400_09.jpg
sr400_10.jpg

Specifications

Part Details
Engine RAM AIR Air Cleaner
BORE ACE Filter Cover
TRESTLES Camshaft
WISECO High Performance Piston Kit
TRESTLES Billet Cylinder
SR500 Stock Crankshaft
TRESTLES Reinforced Valve SP
PINGEL Fuel Cock
Carb / Intake Carburetor FCRφ39
Exhaust Thruxton Full Titanium Exhaust
Brake brembo Brake caliper P4 30/34 40mm
SUNSTAR PREMIUM RACING Front Disc Rotor
SWAGE-LINE Front Brake Hose Kit
brembo 15RCS Front Master Cylinder  
GALE SPEED Rear Brake Master Cylinder
brembo Racing 2P
One-Off Caliper Suppport
Wheels OVER RACING Swingarm Type 1
JB MAGTAN Front Wheel (Rim: 3.00 / Diameter: 17inch)
JB MAGTAN Rear Wheel (Rim: 4.00 / Diameter: 17inch)
One-Off Sprocket Adaptor
Suspension NITRON Rear Suspension Twin Shock TWIN R1 Series
Steps CRAFTMAN Rearsets Kit for SR
Handle / Steering BORE ACE Fork Diameter 35mm Offset 35mm Special Stem Kit for Clip On Handlebar
CRAFTMAN Morphing Mirror Tapered Shaft/Narrow(Black Anodized)Quantity:Pair (for Left and Right)
Thruxton Original Speedometer (Stock Modified)
BORE ACE Steering Stem Kit
Oil Cooler EARLS Oil Cooler
Seat Thruxton Original Seat
Bodyworks Thruxton Fuel Tank (Modified)
Thruxton Front Cowl
One-Off Cowl Bracket
Thruxton Under Cowl
BORE ACE Duralumin Collar
Front Fender TZ Replica
One-Off Rear Fender
Electrical Harley Davidson LED Headlight
KIJIMA Slim Cats Eye Tail LED Type
BULL ORIGINAL LED Turn Signal
AS Uotani SPII High Power Coil (Universal)
SANSEI Carbon Clip-On Handlebar
One-Off Electrical Box

Original Source of this Article

MOTO TIMES

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.