Honda CB750 Four

Lore & Background

When Honda rolled the CB750 Four out of its factories in 1969, the motorcycle industry had been a quiet, European-led affair for decades. Suddenly a Japanese company was putting a four-cylinder, 736 cc engine on a production bike that a regular person could buy, and the result was nothing short of a shockwave. The CB750 Four was the first motorcycle most riders of that generation ever saw that could genuinely threaten a car on a back road, and its arrival reshaped expectations for what a two-wheeler could be.

In the Forza universe, the CB750 Four carries that same sense of historical weight. It sits in the Motorcycle class alongside modern superbikes and track-focused machines, yet it never feels out of place. Its light chassis, simple mechanical layout, and analog feel give it a character that no amount of digital horsepower can replicate. Players who have spent time on the CB750 often describe it as the bike that makes them slow down, look around, and appreciate the ride itself rather than just the lap time.

The K0 designation marks it as the original 1969 model, before Honda made incremental updates in subsequent K-series revisions. In the Forza games, that originality is part of its charm: no electronic aids, no fancy fuel injection, just a carbureted four-cylinder and a rider's instincts.

In Their Own Story

The rain had barely stopped over the coastal stretch, and the tarmac still glistened under a low amber sun. You kicked the stand down, felt the CB750 settle onto its rear tire with a soft metallic clink, and turned the key. The four-cylinder caught on the second pull, coughing once before settling into that unmistakable, slightly rough idle that no modern engine could imitate.

You pulled out onto the two-lane road, and the bike leaned into the first bend like it had been doing it for fifty years. The carburetors swallowed air and fuel in a way that felt almost conversational—blip the throttle, and the engine answered with a bark that echoed off the wet cliffs. There was no traction control to save you, no ABS to bail you out. Just your hands on the bars, your weight on the pegs, and the honest, mechanical feedback of a machine built when engineers still listened to the engine with their ears.

By the time you reached the hairpin, you were grinning. The CB750 didn't just go around the corner; it argued with you about the line, and you both compromised, and the compromise was beautiful.

Reader's Guide

Honda CB750 Four (K0), 1969, Motorcycle class (Classic). Stock, the CB750 is a light, low-power machine: think a modest single-digit-hundred horsepower figure, a featherweight curb weight, and handling that is quick and communicative but ultimately basic by modern standards. It will not out-accelerate a contemporary superbike out of a standing start, and its top speed will leave you wanting on long straights. What it does have is agility, a low center of gravity, and a throttle response that feels immediate and honest.

Tuning levers in the Forza tuning menu let you swap exhaust systems, intake components, and engine management to squeeze more horsepower from that 736 cc four. Suspension upgrades—springs, dampers, and geometry tweaks—let you sharpen turn-in and reduce body roll. Tire compounds and brake kits are the other big levers: a stickier rubber compound and better stopping power will make the bike feel dramatically more planted in fast, sweeping corners. You can also shave weight with lighter body panels and a smaller tank, which helps the power-to-weight ratio but can make the bike feel twitchy at high speed.

The core trade-off is always the same: every point of power you add makes the rear tire work harder, and every gram you remove makes the front end more nervous. Push the engine too far and you lose the smooth, progressive delivery that makes the CB750 so fun. Push the suspension too stiff and you lose the planted, connected feel that separates it from a go-kart.

Build philosophy: treat the CB750 like a conversation, not a spreadsheet—add just enough power to keep the engine singing, keep the chassis light and communicative, and let the rider do the rest.

Did You Know?

• The CB750 Four is widely credited as the world's first mass-produced four-cylinder motorcycle, a milestone that shifted the balance of power from European to Japanese manufacturers.
• The 'K0' suffix in its name denotes the original 1969 model year; subsequent revisions used K1, K2, and so on, each with small mechanical and cosmetic updates.
• In the Forza Horizon series, the CB750 Four is one of the few motorcycles that feels genuinely at home in a world dominated by cars, rewarding players who prefer smooth, analog riding over raw speed.
• The 736 cc displacement figure comes from Honda's bore-and-stroke calculation (68 mm × 50 mm × 4 cylinders), a dimension that became a benchmark for the '750 class' that dominated sport-bike racing for a decade.