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| {{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}}
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| [[Image:1959-Honda-RC142.jpg|right|thumb|1959 Honda RC142]] | | [[Image:1959-Honda-RC142.jpg|right|thumb|1959 Honda RC142]] |
| [[Image:1959-Honda-RC142-Engine.jpg|right|thumb|1959 Honda RC142 Engine (2 valve head)]]
| | There are two valves per cylinder, as can be clearly seen from the position of the spark plugs in the picture. When during practice it becomes clear that the bikes are lacking in power, four-valve heads are flown in from Japan. Bore and stroke are 44 x 41 mm for a capacity of 124.6 cc, and with a compression ratio of 10.5 : 1, 18.5 bhp is developed at 13,000 rpm; maximum rpm is 14,000. The valve angle is 40 degrees for the inlet valves and 44 degrees for the exhaust valves; spark plugs for the four-valve heads are 10 mm. Carburation is by flat-slided Kei-hin carburettors with remote float chambers. Ignition is by magneto, driven by the inlet-camshaft. Lubrication is by wet-sump system, carrying 2 litres of oil. The gearbox contains 6 speeds, and the total weight of the bike is 87 kg. The wheelbase is 1265 mm. In the TT, the bikes finish 6th, 7th, 8th and 11th, earning Honda the team prize. The American rider drops his bike and doesn't finish.The race proved that the Honda's were reliable, but not yet fast enough, although the results no doubt would have been better if top European riders, well acquainted with the TT course, would have ridden the bikes. After the race, Honda's team returned to Japan, having spent on this one trip as much as most factories would spend on a whole season of racing. |
| ==June 1959, TT of Man==
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| Honda arrives on Man with 5 riders, 4 Japanese and one American. They bring along five 125cc racing motorcycles and four training bikes, plus enough spares and tools to set up a self sufficient workshop - a very professional approach.
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| The racers, with the type designation RC142, have open spine frames, in which the engine is a stress bearing part, with leading link front and swing arm rear suspension. The engine is a four stroke twin with the cylinders slightly inclined forward under 6 degrees, with [[DOHC]], driven by a vertical shaft with bevel gears on the left hand side of the engine, and from there with gears to the camshafts.
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| There are two valves per cylinder, as can be clearly seen from the position of the spark plugs in the picture. When during practice it becomes clear that the bikes are lacking in power, four-valve heads are flown in from Japan. Bore and stroke are 44 x 41 mm for a capacity of 124.6 cc, and with a [[compression ratio]] of 10.5:1, 18.5 bhp is developed at 13,000 rpm; maximum rpm is 14,000. The valve angle is 40 degrees for the inlet valves and 44 degrees for the exhaust valves; spark plugs for the four-valve heads are 10 mm. Carburetion is by flat-slided [[Keihin]] [[carburetor]]s with remote float chambers. Ignition is by [[magneto]], driven by the inlet-camshaft. Lubrication is by wet-sump system, carrying 2 liters of oil. The gearbox contains 6 speeds, and the total weight of the bike is 87 kg. The wheelbase is 1265 mm. In the TT, the bikes finish 6th, 7th, 8th and 11th, earning Honda the team prize. The American rider drops his bike and doesn't finish. The race proved that the Honda's were reliable, but not yet fast enough, although the results no doubt would have been better if top European riders, well acquainted with the TT course, would have ridden the bikes. After the race, Honda's team returned to Japan, having spent on this one trip as much as most factories would spend on a whole season of racing. | |
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| {{Honda}}
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| [[Category:Honda motorcycles|RC142]] | | [[Category:Honda motorcycles|RC142]] |
| [[Category:Honda RC series|RC142]] | | [[Category:Honda RC series|RC142]] |
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| {{Motorcycle
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| |name = Honda RC142
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| |photo=1959-Honda-RC142.jpg
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| |aka = RC 142
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| |manufacturer = Honda
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| |parent_company =
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| |production = 1959 - 1960
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| |model_year =
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| |predecessor =
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| |successor =
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| |class = Sport Bike
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| |engine = Two valves per cylinder
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| |bore_stroke = 43.2mm x 43.2mm
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| |compression = 10.5:1
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| |top_speed =130 mph
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| |power = 18.51 HP (13.8 KW) @ 13000RPM
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| |torque =
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| |fuel_system = Carburetor
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| |ignition =
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| |spark_plug =
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| |battery =
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| |transmission = Gear box: 6 Speed <br>
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| Final Drive: Chain <br>
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| |frame =
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| |suspension =Front: Leading link <br>
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| Rear: Swing arm
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| |brakes =Front: Drum <br>Rear: Drum
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| |front_tire =
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| |rear_tire =
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| |rake_trail =
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| |wheelbase = 50.0 inches (1270 mm)
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| |length =
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| |width =
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| |height =
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| |seat_height =
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| |dry_weight =
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| |wet_weight = 87.0 kg
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| |fuel_capacity =
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| |oil_capacity =
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| |recommended_oil=Honda GN4 10W-40
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| |fuel_consumption =
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| |turning_radius =
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| |related =
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| |competition =
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| }}
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| The '''[[Honda]] RC 142''' was a Two valves per cylinder Sport Bike [[motorcycle]] produced by [[Honda]] between 1959 and 1960. Claimed [[horsepower]] was 18.51 HP (13.8 KW) @ 13000 RPM.
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| ==Engine==
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| The engine was a [[air cooled]] Two valves per cylinder. A 43.2mm [[bore]] x 43.2mm [[stroke]] result in a [[displacement]] of just 124.6 cubic centimeters. Fuel was supplied via a double overhead cams/twin [[cam]] (dohc).
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| ==Drive==
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| The bike has a 6 Speed transmission.
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| ==Chassis==
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| Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a Leading link while the rear was equipped with a Swing arm. The wheelbase was 50.0 inches (1270 mm) long.
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| ==1960 Honda RC 142==
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| The bike, born in 1959, had a capacity of 124.6cc and a bore and stroke of 44x41mm with a compression ratio of 10.5:1. The engine developed 18.5bhp at 13000rpm and a weight of 87kg.
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| ==In Media==
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| * [https://motopixel.org/pixel/nippon-motorsports-shi#honda-rc142 Nippon motorsports shi]
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| [[Category:Sport Bike motorcycles]]
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| [[Category:Honda motorcycles]]
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| [[Category:1960s motorcycles]]
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| [[Category:1950s motorcycles]]
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