Cling on for dear life is a blog dedicated to CB 750 Café Racers and other cool motorcycle stuff.
Monday, 29 November 2010
1966 - 50 cc RC116
1966 -125 cc RC149
The RC148, used in the GP of Japan 1965, had the same bore and stroke as the RC 114, 33 x 29 mm, but the new RC149 gets the same dimensions as the RC116: 35.5 x 25.14 mm.
The crankshaft has a special configuration: the three cylinder part has the crankpins at 120 degrees, the two cylinder part has the crankpins, in the usual Honda fashion, at 180 degrees. Both crankshaft are coupled together at the position of the camshaft drive.
The valve angle is 56 degrees, 24 degrees for the inlet and 32 degrees for the exhaust valves. Lubrication system is by wet sump, with two oil coolers in the sides of the fairing.
There's also an oil temperature gauge. The oil temperature is checked, and the coolers can be covered more or less to maintain the oil temperature within certain limits
Power output is 38 bhp at 20,500 rpm. The polyester petrol tank has an unpainted strip, to check the petrol level.
1966 - 250 cc RC166
The Honda six RC116 may be the most glamorous racing bike ever built. Although the Italians are known for their creations, Carcano's masterpiece, the Guzzi V8 500 cc, was a lumpish, ungainly hunk of a motorcycle when compared to the sleek, beautiful lines of the Honda. It's the comparison between a dray horse and a thoroughbred. In addition to its specifications and beauty came the incomparable, ear-splitting howl of its six megaphones and its invincibility in the hands of Mike Hailwood, which made it a legend in its time. Check the reaction on these japanese spectators:
http://www.youtube.com/watch?v=eaRop_ZMwo0
Although outwardly very like the RC165, internally the engine has been changed and now has a bore and stroke of 41 x 31 mm. Carburettors have cylindrical slides, although sometimes flat slides are used. Power output is 60 bhp at 18,000 rpm. Like the RC149, the bike has oil coolers in the right and left hand side of the fairing. Also new are the brakes, which have now radial cooling fins instead of circumferential ones. Dry weight of the seven speed bike is 112 kg.
SEE THE RC166 ON A TRACK HERE : http://www.youtube.com/watch?v=iBrb93O_Xg0
1966 - 350 cc RC173
External difference : the RC173 has round camshaft covers, the RC181 rectangular ones. The engines have now wet sump lubrications, with external oil coolers like the RC149 and 166. The carburettors have cylindrical slides. However, bore and stroke are the trusted 50 x 44.5 mm of its predecessor, and the gearbox contains six speeds. The megaphones have very pronounced reverse cones. Power is 64 bhp at 13,000 rpm. The frames have now bolted-on, twin front down tubes.
1966 - 500 cc RC181
Bore and stroke are 57 x 48 mm for a total capacity of 489.94 cc. Total enclosed valve angle is 75 degrees, symmetrical, so both inlet and exhaust valves are hanging under 37.5 degrees.
There is a six speed gearbox. Power output is 85 bhp art 12,000 rpm, with a redline at 12,500 rpm
A weak point of the RC181 is its crankshaft – the press fit of the crankpins sometimes gives way, causing the crankpins to change position against one another, with disastrous results, a.o. reason of Hailwood's retirement in Monza.
1966
1966 becomes the absolute top year for Honda. They win the manufacturers' world championship in all five classes, for this year they also compete in the 500 cc class, and individual world championships in three classes. It is a unique fact, a record still standing today. Although during the years 1958-60, MV also won the manufacturers' title in all the classes they contested, there were only four classes then – and the competition of the MVs was weak, not to use the term non-existent.
This year Mike Hailwood, arguably the greatest motorcycle racer ever, joins the Honda team as a works rider (his participation and resulting first world championship 250 cc in 1961 was as a privateer, with the Hondas on a loan basis). After Redman's retirement, Stuart Graham, son of the famous Leslie Graham, joins the team to assist Hailwood.
In the 50 cc there's fierce competition between Taveri and Bryans on their Hondas, and Anscheidt, after the withdrawal of Kreidler, on a Suzuki twin. After the one but last GP of the season, the Isle of Man TT (this year one but last because strikes in
In the 125 cc class, the competition for Honda this year comes from Phil Read and Bill Ivy on Yamahas, not from Suzuki. Taveri takes the title, with Ivy second and
In the 250 cc class, Redman and Hailwood have to defeat the Yamaha four cylinders of Read and Ivy. Although the Yamahas are slightly more powerful with 60 bhp, the combination of Hailwood and the Honda six is so superior, that Hailwood wins the first seven races and is already world champion halfway through the season. In total he wins 10 of the 11 races this year. Read is second and Redman, who breaks his arm in Franchorchamps and retires from racing, is third. In the manufacturers' standing, Honda is first, followed by Yamaha, MZ and Bultaco.
In the 350 cc class, Hailwood wins the title with six victories, Agostini is second with three wins, and Renzo Pasolini (Aermacchi) is third. Honda wins the manufacturers' title, followed by MV Agusta, Aermacchi and Jawa. The 500 cc becomes a different story. Redman, who has decided that this will be his last season, wants to round off his career with a 500 cc world championship, so Hailwood will concentrate on the 250 and 350 cc, and Redman on the
In
I Feel The Need... The Need For:
"Madame Guzzi" – The Creation Of A 20 Year Old Kid !?!
Belive it or not this beautiful Ferrari blue Moto Guzzi splendour, is build by Adam Nestor (Born 1989) from Rävlanda
Adam Started build his first bike (a Honda CB 125 K5) with his dad when he was only 16, and is now a bike mechanic at a motorcycle company in Gothenburg.
"Madame Guzzi" was build around the engine of a 1979 Guzzi SP1000, and that is about the only piece cannibalised from that model! Most of the parts for the bike, like the velocity stacks, frame, tank, bars, and exhaust, were hand- fabricated by Adam. Other specs include twin SU HS2 carbs, Benelli hubs, Avon Speedmaster tires, Marzocchi forks, and an Ohlins rear shock.
The bike was entered in numerous categories at the 2010 Västervik bike show, where it took first place in the custom class and landed overall as best-in-show.
Nice going Mr. Nestor. I bet I am not the only one looking forward to see the next bike from this young man?