BaT Auction: CR750-Style 1969 Honda CB750 Sandcast

This 1969 Honda CB750 is an early-production Sandcast model that was modified between 1996 to 1999 by the seller’s shop, World Motorcycles of San Bruno, California, using racing components developed following Honda’s victory at the 1970 Daytona 200. Power is from an air-cooled 750cc inline-four and features sandcast-bodied Keihin CR31 carburetors, titanium components, and high-dome pistons. The bike is finished in blue with white accents and features a full fairing, aluminum fuel and oil tanks, clip-on handlebars, rearset foot controls, titanium suspension components, Works shocks, dual front disc brakes, and a close-ratio five-speed transmission. This CR750-style Honda is now offered with a clean California title in the seller’s name.

Honda offered limited edition kits through its Racing Services catalog that dealers could use to build CR750 racers similar to the works bikes. This example is said to use 170 of the available 185 race kit parts and features an aluminum racing fuel tank finished in Candy Sapphire Blue with white graphics, while the fenders, tail section, and full fairing are painted to match. Additional racing equipment includes rearset foot controls, an aluminum oil tank, and white number plates on the front and sides of the fairing, which is also equipped with a clear windscreen.

Wire-spoke wheels feature magnesium hubs as well as Akront aluminum rims mounted with Dunlop racing tires. The suspension features titanium fork caps, axles, chain adjusters, and a swingarm pivot bolt, as well as a racing fork and Works shocks. Braking is from dual drilled discs up front and a twin leading-shoe drum at the rear.

Clip-on handlebars are mounted below the top triple clamp and feature racing levers, master cylinder, and switches. The floating dash sits behind the front fairing and contains a Smiths oil pressure gauge and a Nippon Denso 12k-rpm tachometer that starts at 4k-rpm. Total mileage is unknown.

The air-cooled inline-four is said to now displace 750cc and be capable of achieving a 10,500-rpm redline thanks to racing components that reportedly include:

  • Cylinders and cylinder head
  • Camshaft
  • Crankshaft
  • Magneto
  • Titanium connecting rods, through bolts, intake valves, and retainers
  • High-dome pistons
  • An oil cooler
  • A two-wire wiring harness

The engine breathes through a quartet of sandcast-bodied Keihin CR31 carburetors utilizing velocity stacks of varying lengths as well as a black four-into-four exhaust system with megaphone mufflers. Power is routed to the rear wheel through a five-speed close-ratio transmission and a drive chain.

Engine number 1000291 is shown above, and frame number 1000259 is viewable in the gallery below.

According to the seller, the bike was first raced to a third place finish at Sears Point in 1999, and most recently campaigned to victory in the AHRMA Formula 750 and Formula Vintage classes at Daytona in 2002, where it is said to have been clocked at 150 mph. It was shown at The Quail Motorcycle Gathering in 2019.

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