#153 SR400Custom Report
This is a “Hardtail Custom” brought in by an owner who travels a considerable distance on a single tour.
Despite the suspension-less “rigid line” hardtail frame, we prioritized ride comfort in its production.
The request from the owner of another custom bike that is beautifully finished was
“I want this SR400 to feel raw and amateurish.”
“Here is the related blog article ①”
“Here is the related blog article ②”
(Below are the impressions of the ride comfort when the owner who went for a test ride returned)




Custom List
FrontHandlebars, F forks, headlights, etc.
【Front Fork Area】
〇The front fork is extended by 5cm. (This is a self-made product by the owner who works at a machining shop)
At 2%ER, see below↓
(We have prepared Front fork 5cm joint pair for SR400/500).
【Front Tire】
The cost-effective tire BT45 is selected by owners who travel long distances.
【Headlight】
” 7 inch Lucas Type Headlight Case Black “
〇A rather large, bright headlight for a chopper. The mounting stay was custom-made from stainless steel.
【Handle/Handle Area】
“6.5 Inch Pullback Handle Post“
〇A combination of a pullback riser and a handlebar that is significantly pulled towards the front.
〇Install a new handle lock on the lower part of the under bracket. It’s a reliable equipment for storage, vehicle inspection, and even in the city.
“MOTOR ROCK Decompression lever“
A decompression lever directly attached to the engine to simplify the area around the handle. (The one on the vehicle is an old model)
【Front Blinker】
“Small Bullet Turn Signal Matte Black 4pcs SET General Purpose“
〇A classic among classics. A chopper-style blinker.
CenterTank, oil tank, seat, step, muffler etc.
【Muffler】
“One-off Pipe Manufacturing Exhaust Pipe Flange Set”
〇Exhaust pipe made one-off using a convenient manufacturing kit for the mouthpiece at the root
【Step】
“Mid Forward Control Kit by Paralyze for SR400/500“
〇A step kit that allows you to ride comfortably with a relaxed knee bend, even if you are tall. Combined with a spring seat, it provides a comfortable ride that you wouldn’t expect from a rigid frame without rear shocks. (Approximately 120mm forward and 20mm down compared to the standard forward step)
【Seat】
『BATES Type Genuine Leather Solo/Pillion Set Vertical Tuck Roll』
〇A seat set made of genuine leather with good cushioning. The spring input position and angle are set and the pillion pad is installed in a position that is unique to 2%ER and less likely to cause fatigue.
(Discontinued) ⇒Genuine Leather STD Solo Saddle Seat/Pillion Pad Set
『Solo Saddle Seat 2 Inch Spring Comfort Mount Set』
〇A mount kit that is easy to install on custom frames and the like. The lever ratio can also be changed, allowing for good cushioning.
【Electrical Equipment】
“SR400/500 Custom Electrical Plate #2%er Original #SR400/500“
〇All electrical components except the CDI are consolidated at the rear of the engine crankcase. It is easily accessible from either side of the vehicle and has good maintainability. There is no need to reassemble even if you return to the swing arm specification during vehicle inspection.
“IC blinker relay wide range specification“
〇A wide-range turn signal relay that can handle 1-150 watts and can be used without difficulty even with LED turn signals. It can also be used as a repro for the original relay.
〇This is a battery-less kit that we manufacture in Japan.
“Custom Ignition Switch Weld On Kit General Purpose“
〇Easy to operate even while riding, welded on the lower left of the seat.
【Gasoline Tank Installation】
〇We have installed and modified a large gasoline tank, commonly known as the “King Sportster Tank”, which is a current Harley model. Despite the length of the gasoline tank, it is possible to change the oil without removing the gasoline tank, just like the standard model.
“Welding nut non-through M8 2p“
〇Drill a hole in the gasoline tank body and weld it in. It’s non-penetrating, so it won’t leak. Used on both sides.
“Weld tab M size 4.5mm thickness 2p“
〇Enlarge the hole diameter and change to a rubber mount specification to hold the non-penetrating nut. Used on both sides.
“Weld tab L size 4.5mm thick steel 2p“
〇Used for the rear installation of the gas tank. This also has an enlarged hole diameter and is used with a rubber mount.
【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.
●A 13cm long hardtail kit, a flat fender with reinforcement on the back, finished with an old-school tail lamp and a one-off sissy bar. The one-off sissy bar was made a little thicker to match the body of the vehicle.
【Hardtail】
『“Rigid Line” Bolt-On Hardtail Kit』(13cm long, made to order)
〇As the name suggests, this is a detachable hardtail kit using bolts/nuts. It remodels the seat rail of the original frame to make it a rigid line. You can revert to the swing arm/rear shock specification when you have a vehicle inspection or want to change the style.
【Tail Lamp】
“Sparto Tail Lamp/Polish Japanese Number Standard”
〇The standard Sparto. Domestic numbers can be installed without any modifications. It was installed on the standard flat fender.
【Rear Blinker】
“Small Bullet Turn Signal Matte Black 4pcs SET General Purpose“
〇A classic among classics. A chopper-style blinker.
“Weld tab S size 4.5mm thick steel 2p“
〇Welded onto the hardtail. Used as a blinker base.
【Drive System】
『Rear sprocket SR400/500 428-56 』
〇An affordable and durable replacement sprocket.
※Parts Reference may show similar products or products with additional processing.