The Honda CB750 Sandcast refers to an early production version of the iconic Honda CB750 motorcycle. When Honda first introduced the CB750 in 1969, the initial batch of motorcycles produced had a unique sandcast engine case. These sandcast CB750s are highly sought after by collectors and enthusiasts due to their historical significance and limited production numbers.
The term "sandcast" refers to the manufacturing process used to create the engine cases of these early CB750s. In the sandcasting process, a mold is made using sand, into which molten aluminum is poured to create the engine case. This method was used for the initial production run of the CB750 before Honda transitioned to a die-casting process, which is more efficient for large-scale production.
The sandcast CB750s are distinguishable by their engine case, which has a rougher texture and unique casting marks compared to later models. These motorcycles also had a few other distinguishing features, such as a flatter seat and smaller rear taillight.
Due to their limited production numbers and historical significance as the first mass-produced inline-four motorcycle, sandcast CB750s have become highly collectible and can command higher prices in the market. Their rarity and unique characteristics make them a sought-after piece of Honda motorcycle history.