Single-Cylinder Serenity: YAMAHA SR400 Custom

• SR400

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Webike's Opinion

Here is a "YAMAHA SR400" custom by Webike community user "KMC". The owner impulsively bought a 1987 SR400, convinced that nothing beats a single-cylinder engine. One of the main reasons for loving this bike is the incredibly satisfying vibration from the engine. Additionally, with its long history, the SR400 offers a wide range of aftermarket and OEM parts, making it highly customizable.

The exhaust has been swapped for a WirusWin Vanguard Exhaust (Sport Type) made of durable and corrosion-resistant SUS304 stainless steel. The elegant, upswept design of the exhaust complements the SR400's classic style perfectly. The sound it produces is deep and rich, with a low thumping noise that’s pleasing to the ear—never too loud or annoying, making it perfect for city rides.

As seen in some of the images, the seat has been replaced with a Semi Double Seat in black by Payton Place, giving it a more chic feel compared to the brown option. The rear end has been lightened up with a GOODS Fender Eliminator Kit, crafted using 3D scanning to ensure a perfect fit for the SR. To combat the intense summer heat in Japan, the bike is equipped with a compact yet highly effective EARLS Oil Cooler. For the tires, race-grade DUNLOP SPORTMAX, known for their sharp and agile handling, are equipped. They offer a linear turning response, smoothly adjusting to lean angles for precise cornering performance.

Gallery

Specifications

Part	Details
Exhaust	WirusWin Vanguard Exhaust Sport Type (Exhaust Pipes Painted Black)
Brake	brembo Brake Caliper P4 30 / 34 40mm ACTIVE Caliper Support (GALE SPEED / Brembo 40mm & Standard Rotor Diameter) SWAGE-LINE Front Brake Hose Kit SWAGE-LINE Rear Brake Hose Kit NISSIN Radial Brake Master Cylinder Kit [Vertical Φ19 Radial Pump Brake Master]
Handles	ACTIVE Handlebar
Frame	One-Off Handlebar Lock
Bodyworks	Peyton Place Original / Semi Double Seat GOODS Fender Eliminator Kit, Battery In Type
Electrical	PROTEC [Optional Parts] PG-660 Pulse Generator Rotation Signal Converter SUPER NATTO SUPER Natto [Long Life/Long Warranty] [Motorcycle Battery] ACEWELL MD052-353 Digital Meter
Drive Parts	SUNSTAR Driven Sprocket Offset (Front)
Engine	NGK Power Cable (Plug Cord) AS Uotani Coil Assembly DAYTONA KEDO Reinforced Oil Pump JB POWER (BITO R&D) FCR Carburetor BORE ACE Twin Oil Line
Oil Cooler	EARLS Straight Oil Cooler Full System
Suspension	NITRON Rear Suspension Twin Shock STEALTH TWIN R1 Series Stock Swingarm for FZR400RR(3TJ)
Rearsets	WM Rearsets
Wheels	Stock Wheels for XJR400(4HM) DUNLOP SPORTMAX α-13 SP HF [110/70R17 M/C 54H TL] TIRE DUNLOP SPORTMAX α-13 SP Z [150/60ZR17M/C (66W) TL] TIRE