Re: Honda RC113
- From: "dustoyevsky@xxxxxxx" <dustoyevsky@xxxxxxx>
- Date: Wed, 29 Dec 2010 18:39:33 -0800 (PST)
On Dec 29, 8:32 pm, "dustoyev...@xxxxxxx" <dustoyev...@xxxxxxx> wrote:
From CycleChaos (<http://www.cyclechaos.com/wiki/Honda_RC113>):
(quote) The Honda RC113, introduced during the Japanese GP of 1963, is
a twin with the same bore and stroke as the previous RC112, 33 x 29 mm
for a total capacity of 49.6 cc, but now with four valves per
cylinder. Total valve angle is 72 degrees, symmetrical: both inlet and
exhaust valves are under an angle of 36 degrees. Ignition is by a
transistorized, breaker less system, with 8 mm spark plugs.
The carburettors are again the flat-slided type. This carburettor type
builds shorter than the round slided type, and the very high engine
speeds necessitate a very short inlet and exhaust length to achieve
optimum wave tuning. Lubrication is by wet sump, and there are nine
speeds in the gearbox. Power output is 13 bhp at 18,500 rpm; the red
line on the rev counter is at 19,000 rpm, and short excursions to
20,000 rpm are allowed. Dry weight of the bike is 53 kg, lower than
its predecessor through extensive use of magnesium, and a curious
front brake.
The latter is the same as used on a normal bicycle, with two brake
pads being clamped on to the rim. This saves total weight and unsprung
weight, which improves handling. Two large, light alloy discs are
mounted on the front wheel to give some streamlining. (end quote)
20 grand in 1963, even with only 50cc displacement, and 13 bhp. A
couple of contemporary non-racing scooter and industrial engines I
glanced at made maybe 3.5 hp at 7,000 rpm, max.
Well, I admit my Varsity didn't weigh 117lbs, but it did the best it
could.
--D-y
Wow, I swear I only hit send twice, after an apparent "fail"!
--D-y
.
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