Difference between revisions of "Honda CB550SC"

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The '''Honda CB550SC''' is a [[motorcycle]] produced by [[Honda]] in 1983.

This is a 550 Four performance cruiser, factory rated at 75 bhp at 9500 rpm, 36.5 lb.-ft. at 8000 rpm. Potent [[air-cooled]], [[DOHC]], link-plate cam chain, four valves per cylinder, offset rocker ~~arms~~ with hydraulic lash adjusters, plain bearing crankshaft, helical primary gears, hydraulic multi-plate wet clutch, six-speed transmission, shaft final drive.

This is a 550 Four performance cruiser, factory rated at 75 bhp at 9500 rpm, 36.5 lb.-ft. at 8000 rpm. Potent [[air-cooled]], [[DOHC]], link-plate cam chain, four valves per cylinder, offset [[rocker arm]]s with hydraulic lash adjusters, plain bearing crankshaft, helical primary gears, hydraulic multi-plate wet clutch, six-speed transmission, shaft final drive.

This is the smaller version of [[Honda]]'s 1983 inline Four, introduced in the Nighthawk 650 and Nighthawk 550 for 1983. The engines share crankcase castings, clutch, transmission and cylinder head. The 572cc 550 has lower primary gearing and the same 60mm bore as the 650; stroke is shorter; 50.6mm to 58mm. To work with the 50.6mm stroke, the 550 has shorter [[connecting rod]]s, crankshaft throws and cylinders. The crankshaft, designed for the 572cc version, is lighter with 1mm smaller diameter journals; the cases are machined to fit.

The engine is designed to be compact. It is narrow, the alternator mounted behind the cylinders, overdriven off the crankshaft by a link-plate chain. It is short; the transmission shafts staggered vertically instead of laying one behind the other. It's also designed for low maintenance. The hydraulic lash adjuster automatically take up clearance between valve stems and rocker ~~arms~~ - meaning no valve adjustment is necessary - and pump down if the engine is over-revved, increasing clearance and reducing the chances of a mis-shift bending the valves. The transistorized electronic ignition is not adjustable, and has electronic advance. The hydraulic clutch, like hydraulic disc brakes, is self-adjusting.

The engine is designed to be compact. It is narrow, the alternator mounted behind the cylinders, overdriven off the crankshaft by a link-plate chain. It is short; the transmission shafts staggered vertically instead of laying one behind the other. It's also designed for low maintenance. The hydraulic lash adjuster automatically take up clearance between valve stems and [[rocker arm]]s - meaning no valve adjustment is necessary - and pump down if the engine is over-revved, increasing clearance and reducing the chances of a mis-shift bending the valves. The transistorized electronic ignition is not adjustable, and has electronic advance. The hydraulic clutch, like hydraulic disc brakes, is self-adjusting.

Low maintenance doesn't mean low performance. The 550 has the same cams as the 650, and, used with the smaller engine, those cams are closer to the high-performance grinds sold by aftermarket engine builders than are most stock camshafts. The four Keihin CV carbs have oval throats, 26.8mm at the venturi, 30mm at the throttle plate, with lightweight throttle slides and thin diaphragms for instant throttle response. Combine the cams and the carbs with the lighter crankshaft and you've got a quick-revving, free-winding 550 that feels faster than anything in the class.

Difference between revisions of "Honda CB550SC"

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 The '''Honda CB550SC''' is a [[motorcycle]] produced by [[Honda]] in 1983.
-This is a 550 Four performance cruiser, factory rated at 75 bhp at 9500 rpm, 36.5 lb.-ft. at 8000 rpm. Potent [[air-cooled]], [[DOHC]], link-plate cam chain, four valves per cylinder, offset rocker arms with hydraulic lash adjusters, plain bearing crankshaft, helical primary gears, hydraulic multi-plate wet clutch, six-speed transmission, shaft final drive.
+This is a 550 Four performance cruiser, factory rated at 75 bhp at 9500 rpm, 36.5 lb.-ft. at 8000 rpm. Potent [[air-cooled]], [[DOHC]], link-plate cam chain, four valves per cylinder, offset [[rocker arm]]s with hydraulic lash adjusters, plain bearing crankshaft, helical primary gears, hydraulic multi-plate wet clutch, six-speed transmission, shaft final drive.
 This is the smaller version of [[Honda]]'s 1983 inline Four, introduced in the Nighthawk 650 and Nighthawk 550 for 1983. The engines share crankcase castings, clutch, transmission and cylinder head. The 572cc 550 has lower primary gearing and the same 60mm bore as the 650; stroke is shorter; 50.6mm to 58mm. To work with the 50.6mm stroke, the 550 has shorter [[connecting rod]]s, crankshaft throws and cylinders. The crankshaft, designed for the 572cc version, is lighter with 1mm smaller diameter journals; the cases are machined to fit.
-The engine is designed to be compact. It is narrow, the alternator mounted behind the cylinders, overdriven off the crankshaft by a link-plate chain. It is short; the transmission shafts staggered vertically instead of laying one behind the other. It's also designed for low maintenance. The hydraulic lash adjuster automatically take up clearance between valve stems and rocker arms - meaning no valve adjustment is necessary - and pump down if the engine is over-revved, increasing clearance and reducing the chances of a mis-shift bending the valves. The transistorized electronic ignition is not adjustable, and has electronic advance. The hydraulic clutch, like hydraulic disc brakes, is self-adjusting.
+The engine is designed to be compact. It is narrow, the alternator mounted behind the cylinders, overdriven off the crankshaft by a link-plate chain. It is short; the transmission shafts staggered vertically instead of laying one behind the other. It's also designed for low maintenance. The hydraulic lash adjuster automatically take up clearance between valve stems and [[rocker arm]]s - meaning no valve adjustment is necessary - and pump down if the engine is over-revved, increasing clearance and reducing the chances of a mis-shift bending the valves. The transistorized electronic ignition is not adjustable, and has electronic advance. The hydraulic clutch, like hydraulic disc brakes, is self-adjusting.
 Low maintenance doesn't mean low performance. The 550 has the same cams as the 650, and, used with the smaller engine, those cams are closer to the high-performance grinds sold by aftermarket engine builders than are most stock camshafts. The four Keihin CV carbs have oval throats, 26.8mm at the venturi, 30mm at the throttle plate, with lightweight throttle slides and thin diaphragms for instant throttle response. Combine the cams and the carbs with the lighter crankshaft and you've got a quick-revving, free-winding 550 that feels faster than anything in the class.