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Enhanced Functionality and Playability with Minimum Risk: YAMAHA SR400 Custom

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 9 min read

Webike User's SR400

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How is it that a single-cylinder motorcycle with only 27 horsepower and no electronic controls can be so attracting? I guess Yamaha didn't know either. A bike with the simplest design in terms of engine structure and frame, but it is this simplicity that allows the rider to feel the most original pleasure of riding a motorcycle. Whether it's a TRACKER, CAFE RACER, SCRAMBLER, BOBBER, CHOPPER or even a TRACK BUILD, it's hard to beat the SR400, an evergreen bike with a high popularity. This time we are going to introduce the SR400 CAFE RACER built by Webike Hong Kong User.

Bodyworks

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What caught the eye is of course this rocket cowl in the front, perfectly presenting the handcrafted racing style of the 60's. The fairing wraps the entire front of the bike, and the whole bike is color-coordinated with British racing green and the bottom paint has gold glitter, and the fuel tank part is white with a gold pull, and the YAMAHA characters are hand-engraved, bringing out the spirit of British CAFE RACER. It allows riders to reduce wind resistance better at high speeds, but CAFE RACER is of course a cool ride, not a fast ride.

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The tank looks like it was replaced with another model, but it's actually the stock tank with POSH's CAFE 3 tank cover to create the slender feel of the CAFE RACER. The advantage is that you don't have to modify the frame or transplant the tank, you just need to put on the tank housing, and then paint the housing with white background and gold Yamaha pulling letters to make the bike visually perfect.

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The seat is a typical CAFE RACER single seat with a small hump design, and it fits perfectly in the rear frame of the SR400. Anyone who has modified an SR400 knows that the rear frame of the SR400 is very difficult to handle when modifying a CAFE RACER because often riders want to make the frame straight and horizontal from end to end, so they often have to "chop the tail" and weld it back together with a U-shaped iron. It will also change the original proportions of the SR400. Therefore, the owner did not use the chopped tail to retain the lines of the original SR400 and bring out the feeling of CAFE RACER, which can be said to be very successful.

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The rear hump is close to the rear of the frame, and the hump can also store a small amount of items, which can be said to be both aesthetic and practical. The cushions are handcrafted in a leather stripe style.

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The front fender is plated with short sand version to give it more vintage racing look.

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CAFE RACER certainly uses the bar end mirrors.

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Taillight changed from the original square to goose egg shape.

Intake & Exhaust

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The exhaust pipe uses the same PEYTON's PLACE SR Conti tail section. The retro tapered pipe design with electroplated style is naturally the best choice for CAFE RACER, with PEYTON PLACE engraved on the pipe body.

Handle

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One of the main points of CAFER RACER is to make the riding posture more aggressive. For this reason, the handlebar was changed to a split type and the DAYTONA Top Bridge was replaced with the stock brigde with a crown mount. Although the clip-on handlebar makes the riding posture more aggressive, the actual riding is not too tiring, as the fuel tank is just the right size for the legs to clench, so it takes a lot of the burden off the upper body of riders. The meter has been changed from the sock large double meters to a small mechanical round meter also made by DAYTONA, with the indicator and the meter frame combined, allowing the whole meter set to be reduced and placed inside the rocket cowl. In addition, the electric door has been moved down to the bottom of the fuel tank, making the whole front section look more compact.

Engine

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In addition, in order to reduce the weight of the bike, it is essential to hollow out the frame, so it is necessary to remove the entire original air box and hide the battery, ignition computer and rectifier under the saddle with a special frame storage plate.

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Although there is no major power upgrade, such as replacing the carburetor with a Keihin FCR or Yoshimura TMR-MJN, the air intake has been replaced with a large high-flow air filter, and the crankcase breather hole has also been replaced with a high-flow air filter to increase the exhaust efficiency for smoother acceleration at low and medium rpm. The bottom of the engine is also replaced with a metal guard plate, which fits the frame shape better than the stock one.

Gallery

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Specifications

Part Details
Carb / Intake DNA Moto Filter Per Model
Exhaust Peyton Place SR Conti Exhaust
Drive System SUNSTAR Front Rear Sprocket & Chain Caulking Joint Set
Handle / Steering DAYTONA Separate Handle Set
Peyton Place TZ Type Top Bridge
Bodyworks Peyton Place Half Cowl Kit
POSH Cafe III Tank Cover
Peyton Place Stainless Steel Short Fenders
DAYTONA Micro Mini Rear Fender
Electrical GARAGE T&F Electric Plate Type I
WM Electrical Plate Set
POSH Blinker Set (Bullet Type)
POSH Vintage Round Taillight
MADMAX Taillight
DAYTONA Mechanical Speedometer 140km/h
DAYTONA Mechanical Tachometer
DAYTONA Mini Meter Bracket (Double)
DAYTONA Indicator kits by model
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.