RCM Kawasaki ZRX1200R…Serial number: RCM-528
This modified Kawasaki ZRX1200R is RCM’s 528th bike, with serial number RCM-528. The engine has been completely overhauled and equipped with genuine ZZR1200 pistons for higher compression. The transmission has been upgraded from a 5-speed to a 6-speed.
The front and rear wheels are 17-inch O.Z. Racing wheels (wheel diameter is the same as the stock size), the front forks are inverted Ohlins, the swingarm is a wide one with a stabilizer made by SCULPTURE, and the front and rear brake calipers are made by Brembo. The suspension has been finished with high precision and uses current high-spec parts.
This version was completed in June 2021 and had traveled 2,575 km since delivery. The car was released for 5,148,000 yen (tax included). The car exhibited at the Tokyo Auto Salon 2025 has been modified in detail, such as removing the silencer part of the muffler and the sticker on the under-cowl, and being fitted with Michelin tires.
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The crankcase features a cover with the RCM logo.
The RCM-528 serial number plate is placed under the carbon meter plate, which was created using CAD.
The Kawasaki ZRX1200R was released from the 2001 model to the 2008 model (pictured is the 2008 model). It is equipped with a water-cooled, 4-stroke, in-line 4-cylinder, DOHC, 4-valve, 1164cc engine. Maximum output is 95ps/7500rpm. The intake system uses a carburetor.
The booth of KOYORAD, which offers a wide range of heat exchange systems for four-wheel and two-wheel vehicles.
KOYORAD is a prestigious manufacturer that offers a wide range of high-performance heat exchange systems for automobiles and motorcycles, including radiators and oil coolers. The modified Kawasaki ZRX1200R exhibited at the company’s booth is a complete RCM series machine built by motorcycle customization expert SANCTUARY.
“RCM (Radical Construction Manufacture)” is a fully custom-made complete machine production system that Sanctuary started in 2000.
RCM primarily accepts applications for Japanese on-road sports models. So far, they have revived “treasured big bikes” such as the Kawasaki air-cooled Z series, various Kawasaki Ninjas, Kawasaki Zephyr, Suzuki Katana, and Honda CB-F as modern versions.
The key point of RCM is that it sets itself apart from vehicles that simply have parts replaced. For example, the key frame is reinforced after being modified. Special processing is also carried out to match the chassis dimensions. The engine is fully overhauled down to the smallest detail before being installed. The suspension is finished with high precision and uses current high-spec parts. All sections, including the electrical system, intake and exhaust system, position system, and body parts, are manufactured using a process that does not allow for compromise.
After the vehicle is completed, it is subjected to a 200-300km road test drive, and any issues that are common with custom vintage cars are thoroughly troubleshooted before delivery.
The modified Kawasaki ZRX1200R pictured here is RCM’s 528th bike, with serial number RCM-528. The engine has been completely overhauled and fitted with high-compression ZZR1200 stock pistons for increased compression. The transmission has been upgraded from a 5-speed to a 6-speed. The engine’s cast iron parts have been painted with Guncote. The carburetor used is a Yoshimura Mikuni TMR-MJNΦ38.
The front and rear wheels are 17-inch O.Z Racing wheels (wheel diameter is the same as the standard size), the front forks are inverted Ohlins type, the swing arm is a wide one with a SCULPTURE stabilizer, and the front and rear brake calipers are made by Brembo.
To achieve the ideal fit for the Leopard single seat, the seat rails have been modified, the seat bottom has been remade from FRP, and the mounting bracket has been custom-made and the angle has been readjusted. Not only has the ride been tuned to perfection, but the appearance has also been perfected.
Main specifications (custom parts)
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| Frame | Seat rails powder coated after partial processing | |||
|---|---|---|---|---|
| Front and rear wheels | O.Z. Racing Wheel GASS RS-A Black for ZRX1200 (F 3.50-17 R 6.00-17) | |||
| Front fork | OHLINS Inverted ExM Package (BLK fork / length 800mm, spring rate 0.85N/mm) | |||
| Front and rear tires | Front Michelin 120/70-17 Rear Michelin 190/55-17 | |||
| Front and rear discs | Front: SUNSTAR Works Expanded φ320 Hole & Slit Rear: SUNSTAR φ250 Hole & Slit | |||
| Front and rear calipers | Front: Brembo CNC 4-pot GP4-RX Rear: Brembo CNC 2-pot nickel coated | |||
| Brake master cylinder | Brembo CNC Racing Radial Pump Φ19 x 18 | |||
| clutch master cylinder | Brembo CNC Racing Radial Pump Φ16 x 18 | |||
| Left and right master levers | ZETA RCM Concept Flight Lever | |||
| Brake and clutch hoses | Allegri Sholto System | |||
| Handlebars | Daytona RCM Concept Handlebar & Grip Ends | |||
| Steering stem | SCULPTURE ZRX Inverted ExM Package Stem Kit | |||
| Swingarm | SCULPTURE Wide Swing Arm + Block Piece Stabilizer + Racing Stand Hook | |||
| Rear shock | NITRON Stealth twin rear shock | |||
| engine | coating | Casting section gun coat and full overhaul | ||
| piston | ZZ-R1200 genuine Φ79 high compression piston | |||
| cylinder | Normal Top surface minimum polishing | |||
| camshaft | normal | |||
| valve | normal | |||
| Cylinder head | Oversized valve guide replacement / Seat ring cutting / Minimum surface grinding | |||
| crankshaft | Dynamic balancing and journal wrapping followed by selective replacement of main and connecting rod metals | |||
| transmission | DAEG genuine 6-speed transmission | |||
| clutch | Pegasus Back Torque Limiter | |||
| others | Oil bypass line | |||
| Intake system | Yoshimura Mikuni TMR-MJN DSFΦ38 Carburetor (Anodized Two-Tone) | |||
| exhaust system | Nitro Racing Weldcraft 3D Titanium EX | |||
| cooling system | KOYORAD Round Radiator Kit + High-Mount Round Oil Cooler Kit | |||
| Body parts/electrical system | Genuine front bikini cowl for ZRX1200DAEG, Leopard single seat (with some custom modifications) single seat bracket, one-off acrylic points, smoke screen, Nitro Racing modified under cowl for Ninja, Nitro Racing carbon front fender, RCM aluminum tool case kit (rear fender), Nitro Racing rear step, LED lights, Magical Racing carbon rearview mirror, AS Uotani SP-II electrical system , STACK triple stepping meter (one-off original carbon meter panel), YF Design paint | |||
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