Serial turbocharged motorcycles

The CX500 Turbo was released in 1982. The CX500 Turbo (also known as the CX500TC) was only produced for the 1982 model year. It was superseded by the CX650TD (CX650 Turbo; D=1983) for the 1983 model year, which was itself discontinued the same year. The 1982 CX500T was Honda's first production motorcycle to have programmed fuel injection system. With redundant fail-safe systems working in tandem with a separate ignition system. Electronic system failures were reported to the driver through two dashboard displays: an issue with the fuel injection system would light a "Fuel System" light on the dashboard and an issue with the ignition would flash the "TURBO" indicator.
Max. Power - 82hp
Yamaha XJ650L Seca Turbo. With the appearance of turbocharged Formula One cars in the late 1970s, "turbormania" gripped motorsports and spilled over into everyday life, where the word "turbo" was applied to products from aftershave to vacuum cleaners. In the two wheeled world, every major manufacturer added a turbocharged model. Honda led the way with the CX500T; Yamaha was more cautious.
If the turbo represented a low-cost way of boosting the performance of an automobile, the weight and bulk of this bolt-on goody and its attendant plumbing made its advantages less obvious on motorbikes, where large-capacity engines were readily available anyway. But at the time Honda and Yamaha were locked in a bitter struggle for supremacy. The latter couldn't let the former outdo it in terms of high-tech features, even though at the period its finances were under considerable strain.
Yamaha chose its XJ650L as a starting point. To speed development while keeping costs as low as possible, the marque decided to retain carburetors rather than shifting to Fuel injection. A small-diameter turbocharger minimized throttle lag. Otherwise, the machine was quite conventional, though its aggressive fairing made it look at least like a fuel-injected 750. However, its performance was little improvement on the normally aspirated version, and sales were low.
Max. Power - 90hp
The Suzuki XN85, released in early 1983, was a turbocharged motorcycle. It was designed as a sportbike. The name came from the fact that it reportedly produced 85 bhp. Actual bhp at the rear wheel proved to be in the low 70 range. It featured the first factory 16-inch front wheel (at least in the U.S.), which was previously seen only on race bikes. It also had low clip-on handlebars, rearset foot pegs, four-into-one exhaust, and a monoshock rear suspension, called the Suzuki Full Floater, the first to feature this, and EFI. Its styling was from the katana motorcycle.
The engine was rather tame, with boost kicking in around the 5,000 rpm mark. The fuel-injected motor pulled strongly from that point but did not match the performance of larger sportbikes. The engine used an oil-jet forcible cooling system to spray oil on the bottom of the pistons to improve engine cooling. Later iterations of this cooling system became the Suzuki Advanced Cooling System. While the XN did not have the power of other sportbikes, due to frame and suspension geometry, it had notably better handling than similar powered machines. Total XN85 production was 1,153 units from 1983 through 1985. 300 of those were exported to the U.S, where the bike was sold only in its initial year - 1983.
The XN85 was replaced shortly after its release in the U.S. by the lighter and cheaper GS750ES.
Motorcycle.Com stated many years latter "An epic failure, the Katana-styled bike was the most unreliable and poorly selling turbo bike from the Japanese manufacturers"
The Kawasaki GPz750 Turbo was a sportbike manufactured from late 1983 to 1985, with two model years – the 1984 E1 and the 1985 E2. Differences were minor, a twin "push/pull" throttle cable for the E2 and different brake caliper stickers. The bike was manufactured in Japan, with parts also shipped to the US and assembled in Kawasaki's Nebraska plant for the US/Canada market to bypass the import tax levied on bikes over 700cc at the time by the US government, a protectionist move designed to save Harley-Davidson which was having financial problems at the time.
Although carrying GPz badges on the engine covers, it was only referred to by Kawasaki as the "750 Turbo"——the GPz tag was not mentioned. It is also referred to as the ZX750E.[1] Development started in January 1981 as a turbocharged 650, then as a 750 from November 1981. When finally released, the stock bike made a claimed 112 hp (84 kW)

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