Strong Admiration for the #19 Freddie Spencer: HONDA CB900F Custom

HASEGAWA SPL.'s CB900F

When considering customizing a CB-F, almost everyone thinks about the model of #19 Freddie Spencer, the AHM (American Honda Motor Company) ace who won the "Daytona 100 Mile," the opening round of the AMA Superbike Series held in the United States in '82. As you can see, This CB900F is also customized to resemble that bike. The front wheel is 16 inches, and the rear wheel is 18 inches to match Spencer's model. The steel megaphone exhaust is a Spencer replica type made by the SSP factory.

The order was placed with the strong goal of creating a Spencer CB-F. The 16-inch front wheels, which were used in the World Grand Prix 500 class, the most prestigious race of the time, were reproduced to enhance the machine's turning ability, while maintaining a close balance with the original bike's appearance. The engine underwent a complete overhaul and was converted to 1000cc at Platz in Furano, Hokkaido, a well-known establishment that handles a wide range of models and participates in the Suzuka 8 Hours endurance race. The Spencer CB-F also featured a 1023cc engine, which was the maximum allowed by the regulations at the time. Therefore, it can be said that this build follows the Spencer CB-F's specifications. Building a racer with the same specifications is much easier compared to the street version, which poses challenges due to safety parts and the electrical system.

Electrical

The gauges are OEM for the North American specification CB750F and, unlike the AMA Superbike racers who prioritize external appearance, it functions properly as expected. On the left side, you can see the Daytona Moto GPS Radar LCD 3.0. The front master cylinder features a Brembo radial pump, and the stem has been replaced with the OEM XJR1200 with some modifications.

Bodyworks

A steering damper, replicating the Spencer CB-F, is installed by horizontally placing the damper unit at the front end of the frame and operating it with a bar extended from under the stem. In order to achieve authenticity as much as possible, the headlight is mounted with a cut-out for the race number plate, and the oil cooler is also positioned in the same location.

Engine

The engine undergoes an overhaul and is upgraded to 1000cc at Platz in Hokkaido. This is done to replicate the RS1000 engine, which is a 1023cc modification of the original CB750F engine based on the CB900F. The carburetors are set with TMR carburetors in air filter specification.

Intake & Exhaust

The 4-2-1 steel megaphone end full exhaust is a "Spencer" replica by SSP Factory, accurately replicating details such as the bend of the far right exhaust pipe.

Chassis

The front end features a front fork with a diameter of Φ43mm, resembling the size of the SHOWA Φ41.3mm front fork used for the "Spencer" bike's NS500. The base for this setup is the XJR1200. Additionally, it is equipped with large-diameter Φ320mm brake discs. The front calipers are Brembo Axial Cast P430/34. The fender bracket has also been designed to closely resemble the "Spencer" bike.

The wheels are set to 16/18 inches, with the front wheel being the OEM 3.50-inch width from the CBR900RR, and the rear wheel being a OEM 5.50-inch width from a Honda craft machine. The swingarm is XJR400 OEM and has an added stabilizer. The rear brake features a Brembo Cast P232 caliper and a Sunstar Works Expand brake disc, providing a modern setup. And of course, the race number plate is #19.

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Specifications

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