#143 SR400Custom Report
About 10 years ago, we created a compact bobber style that utilized the rear shock, under a different store name, based on the SR400.
We added a sissy bar to comply with the number plate law revision.
With the addition of a sissy bar that can carry luggage to a small and easy-to-handle style, this chopper can handle not only city riding and highways, but also long touring.
The engine of the lightweight body is quite fast with a 500 crank built in and an FCR carburetor.
This is a custom SR that was assembled with ingenuity in an era when there were not as many bolt-on parts as there are now.
〇【Click here for the Bobber/Compact Chopper Complete】
〇【Click here for the article published in THE SR TIMES①】


Custom List
FrontHandlebars, F forks, headlights, etc.
【Front Fork】
◯In order to create a sense of density, the front fork has been lowered by 5cm.
【Front Wheel】
◯The wheel is a combination of an old 19-inch disc, deadstock tires from Million, and a Grimeca caliper and master.
【Front Fender】
◯The front fender is a resized version of the original.
We currently have this fender↓
“2%er Short Front Fender STD [SR400/500]“
【Headlight/Handle】
◯The face area is designed with a Harley TIN cover, which has been narrowed to match the size of the SR, and a square light attached vertically.
◯The handle was custom-made with a layout similar to Old Flanders.
“Amal type throttle holder, general purpose (for 7/8″)“
The controls such as throttle and switches are miniaturized for a clean and simple look.
“MOTOR ROCK Decompression lever“
A decompression lever directly attached to the engine to simplify the handle area. (The one on the vehicle is an old model)
【Speedometer】
“Mechanical Speedometer 60mm Black Panel 1:4“
〇Mounted on the left front side of the gasoline tank, where it is inconspicuous and highly visible.
CenterTank, oil tank, seat, step, muffler etc.
• The gas tank is a cherished deadstock Wassell Peanut. I asked “POTSDESIGN ” for the speedy and classical lettering. Within this style, I have produced many compact bobbers with this specification, using a method that combines the comfort of the rear shock, lowering, and improved styling.
【Step】
◯The steps of the drilled design, and things like the kick pedal and seat, are all one-off productions.
【Carburetor】
“FCR carburetor 39φ SR400/500 single unit“
〇The slow SR’s performance will drastically change. It’s a high-performance carburetor that offers sharp and smooth acceleration and good startability.
〇It’s a dedicated adapter to firmly fix the FCR carburetor to the SR400/500.
“Net funnel set for FCR carburetor“
〇It’s a set of a stainless steel debris net and an aluminum funnel, which is a change from the red plastic funnel.
【Electrical Equipment】
〇This is a battery-less kit made entirely in Japan.
『IC blinker relay wide range specification』
〇A wide-range turn signal relay that can handle 1-150 watts without any problem, even with LED turn signals. It can also be used as a replacement for the original relay.
【Engine Area】
〇This is a filter kit needed when removing the original air cleaner.
【Drive System】
“Front sprocket SR400/500 428-19“
〇A durable replacement sprocket made of steel.
RearFenders, rear shocks, swingarms, etc.
【Rear Wheel】
◯ The rear wheel is a 16-inch conversion using the XS650 rim.
We currently have this kit available↓
『16″ Kit Steel Spoke SR400/500 Rear』
〇 It’s a kit that gives a powerful look, the same size as a typical Harley.
【Rear Shock】
◯ The rear shock is a modified and reused one for Daytona’s Magna 250.
We currently have this rear shock↓
〇A rear shock that is about 4cm down. It moves well among the low-down suspensions. (Removal of the original chain case is necessary)
【Rear Fender】
◯The rear fender is also repurposed from the original XS650, but has been narrowed down.
【Sissy Bar】
◯The Sissy Bar is extremely convenient for loading luggage. It’s challenging to ensure design and durability when adding to the compact chopper style with a short rear fender, but we’ve strived to make it user-friendly and well-balanced.
【Tail Lamp】
◯The tail is round Ford.
【Drive System】
“Rear sprocket SR400/500 428-56“
〇A durable sprocket made of steel.
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