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| Manufacturer | Yamaha |
|---|---|
| Production | 1985–1991 |
| Class | Sport |
| Engine | 749 cc liquid-cooled in-line four-cylinder |
| Power | 110 PS (81 kW) @ 10,500 rpm |
| Transmission | 6-speed |
| Dimensions | L 2225 mm W 755 mm |
| Seat height | 790 mm |
| Weight | 210 kg (460 lb) (dry) |
| Fuel capacity | 21 litres (4.6 imperial gallons) |
| Related | Yamaha FZR1000 |
The Yamaha FZ750 is a sport motorcycle produced by Yamaha Motor Corporation between 1985 and 1991. The FZ750 is notable as predecessor of the highly successful Yamaha FZR1000.[1]
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Yamaha released the FZ750 in 1985. The bike was popular, and competed well against others in the "sport" class of motorcycles. The machine was noticeably narrower than many contemporaries. Yamaha achieved this by placing the alternator behind the cylinders, instead of the more normal position: on the end of the crankshaft.
The FZ750 uses an all-aluminium, liquid-cooled, tranverse-mounted, in-line, four-cylinder engine. The complex cylinder head is constructed in two halves, with dual chain-driven overhead camshafts operating 20 valves, 3 inlet and 2 exhaust per cylinder. Valve clearances are adjusted with under-lifter shims.
The four 34 mm Mikuni constant-velocity downdraft carburettors are mounted in a bank behind and above the cylinders and feed each cylinder through short intake manifolds. Four exhaust downpipes join a box below the engine where the gases are split to exit through two silencers.
The crankshaft is geared directly to the clutch. No counter balancer shaft is used. Starting is by electric starter only. Lubrication is wet sump using a trochoid pump.
The FZ750 uses a six-speed sequential close ratio gearbox; the gear shafts are only removable by splitting the crankcase halves. The clutch is of the wet, multi-plate type and is hydraulically operated. Final drive is by O-ring chain and sprockets. A safety feature of the FZ750 is that the engine ignition is cut if first gear is selected with the sidestand down; this is commonplace on modern motorcycles.
The frame of the FZ750 is manufactured from mild steel box-section and uses a perimeter layout. The fairing and upper rear section use separate cylindrical tubing sub-frames. The rear shock absorber is placed vertically behind the engine and connects to an extruded aluminium alloy swinging arm via several forged aluminium rocker arms. The 16-inch (410 mm) front wheel is held between spring and oil damped forks. Later models of the FZ750 used a 17-inch-diameter (430 mm) front wheel. Early FZ750s used twin ventilated disc brakes for the front wheel with a single ventilated disc at the rear. Later versions used unventilated disks, with four piston calipers on the front.
The FZ750 features a standard 12 volt electrical system. The alternator and starter motor are mounted behind the cylinders. Yamaha's self-cancelling indicator unit is used and a variable-resistance gauging system is used to monitor engine oil contents with associated warning lights. Nippondenso Transistor Controlled Ignition (TCI) is used in conjunction with two coils.
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The contents of this page are derived from <http://en.wikipedia.org/wiki/Yamaha_FZ750>
Text available under the Creative Commons Attribution-ShareAlike License;
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