Things are shaping up fast for CYCLE WORLD'S First Annual National Motorcycle Show, to be held in conjunction with the International Custom Car Show at Los Angeles' magnificent Sports Arena this coming May 22nd, 23rd, and 24th. We have long felt that the motorcycle industry needed the type of show that the automobile enthusiasts enjoy, such as the New York Automobile Show.
I have a 1961 MZ 125cc motorcycle and I would like to know if I could put a two-cylinder engine in its frame? If so, what make and displacement would you recommend? Eddie Foster Oak Lawn, Illinois We have been getting a lot of letters from people who want to know about installing bigger engines in their motorcycles, so it would seem that this is a good time to make a general statement of policy in that regard.
Miss Sharon Otis hands Don Brown the first winning ticket in Triumph's "TV Times" promotion in which two 1964 Triumph Bonnevilles were given away free. Miss Otis is an Adrian Teen model in Pasadena, California, and 1962 "Miss Junior Rose Bowl."
High speed, professional, Continental road racing with an ear-splitting four-cylinder roar.
NEARLY EVERY RIDER of any consequence in world standings was in Daytona for the United States Grand Prix, and staged the most impressive road race ever seen there. England's Mike Hailwood, Gary Dickinson, Jim Baughn, Alan Shepherd, Joe Dunphy, Phil Read, John Hartle, B. J. Davis, W. Scott, Dave Degens came.
"GOOD GRIEF, CHARLIE BROWN!" That startled comment was heard ringing through our offices on the day we learned that the mighty Norton Atlas was to be produced in scrambler form. Even though a year had passed since we tested the touring version of Norton's 750cc Atlas, that machine's very muscular performance was still quite fresh in our minds.
THE NEW AND EXCITING in the world of motorcycling quite naturally attracts most of our attention, and it is good to be reminded from time to time that the old and familiar is more likely to give good results. Our latest reminder of this came when we were given a Velocette 500 Scrambler for testing.
CYCLE WORLD has often had the privilege of spending time with Yamaha motorcycles. In each case our findings and opinions met with comments inclined towards a suspicion that we had sold out our integrity to Yamaha. So staunch was our enthusiasm for the Japanese two-strokes, some of our critics felt we could not possibly have liked them so much.
BIANCHI TWIN was originally conceived in 1961 as a two-fifty (55mm × 52mm) with 40 hp @ 12,000 rpm), but due to its bulk it was converted to a 350 by enlarging the bore to 65mm while retaining the same stroke. Power was stepped up to 53 bhp @ 10,800 rpm. As a 350 machine proved quite successful, it was then enlarged to 500cc in another version. In this form its bore/stroke was 70mm × 59mm = 452cc; it developed 60 bhp @ 10,000 rpm. Over twisty race courses this machine was a match for the big fours since it was lighter and handier, and as a matter of fact it beat both the MV and Gilera fours at Sanremo and Imola. For 1964 it is being brought out closer to the capacity limit of its class to gain more horsepower; 67 bhp is the forecast. Double overhead cams are driven by a spur gear in the center of the crankshaft which also drives the distributor and oil pump. The six-speed gearbox is in unit, wet-sump lubrication is used, and weight is 281 pounds for the 350 and 286 pounds for the 452cc.
AERMACCHI is the only "over the counter" bike built today in Italy. It is offered in either 250 or 350 versions, the latter of which, if rumor serves its task well, will be seen in the U.S. very soon. Both are particularly attractive to the "private" (ie; non-factory supported or sponsored) rider, as they are not expensive and are easy to maintain. The 250 delivers 29 hp @ 9,800 rpm at the rear wheel, while the 350 gives well over 30 bhp @ 8,500 rpm. Bore and stroke are 72mm × 61mm = 248cc, and 74mm × 80mm = 348cc. Both are push-rod operated ohv, have five-speed gearboxes in unit with the engine, coil ignition, and 18-inch wheels. A new high resistant steel rod is used this year. More details can be found in CYCLE WORLD, December 1963 issue.
MORINI 250 is the miraculous single that challenged and beat the multi-cylinder machines in 1963's world championship events ridden by Tarquinio Provini. It is surely the fastest single-cylinder racer of today, even outrunning the Norton 500cc Manx and the Matchless G-50. Launched at the 1958 Italian Grand Prix, which it won, this 72mm × 61mm bore/ stroke, gear-driven dohc machine puts out 36 bhp @ 10,500 rpm, transmitted to the rear wheel through a six-speed gear box in unit. Its superiority lies in its lighter weight, 231 pounds, better torque and handling than its rivals, plus the superior Provini of course. Double-coil ignition, wet-sump lubrication, gear-driven primary drive, dry multi-plate clutch, 18-in wheels.
BENELLI 250 FOUR, introduced in 1960, was built on the lines of a similar model (but water-cooled and supercharged) developed just before the outbreak of World War II. It is showing great promise but still has teething problems. Scheme of the power plant follows Italian tradition with cylinders set transversely across the frame; double overhead cams are driven by a set of gears between the cylinders, primary drive is by gears between the two middle cylinders. Bore and stroke are 44mm × 40mm, power output is 40 hp @ 12,500 rpm. Other details: Coil ignition, six-speed gearbox in unit with the engine, wet-sump lubrication, 241 pounds weight, and 18-inch wheels.
In the early thirties a team of engineers from Rome, including the famed driver/designer Piero Taruffi, developed a 500cc four cylinder racer called a "Rondine" (Swallow), which was bought in 1936 by the GILERA concern of Arcore (Milan), to be raced under their name. It won the European Championship in 1939. Brought up to date after the war, it lost the supercharging and water cooling of the first version, but the general layout of the power unit remained unaltered (later to be copied by several Italian and Japanese manufacturers). The 500cc Gilera was indeed the most successful multi-cylinder mount used in 1946-47. At the end of 1957 Gilera retired from racing, only to return again with the same machinery in 1963 with the famous Scuderria Duke. The Arcore "Fire Engine" with its 45° inclined cylinders, 52mm × 58mm bore/stroke dimensions, develops 70 bhp @ 10,500 rpm, has dohc that are gear driven (as is the primary drive), magneto ignition and five-speed gearbox in unit with the four cylinder engine. The multi-plate clutch runs in oil, 19-inch wheels are fitted, weight is about 330 pounds. In 350cc form, 46mm × 52mm bore/stroke power is 46 bhp @ 11,000 rpm.
MV AGUSTA, the Gallarate firm which, up until now, has won more world championships than any other factory, introduced their four-cylinder machine in 1950. Following Gilera's scheme, development, in fact, was carried out by a staff of engineers from Gilera, but featured such novelties as shaft drive, steel in torsion suspension, etc. However, most of these innovations were abandoned and the MV is practically a replica of the Gilera, the only noticeable difference being bore/stroke dimensions which are 53mm × 56 mm. MV also has a 350 version (47mm × 49mm) which has the same power as the Gilera 350. Needless to say, MV is the factory that has won the 500cc class six years running, while Honda has captured the 350 honors in spite of some good performances given by Mike Hailwood. The truth is that, like the Gilera, the 350 is simply too large and heavy; and, it is not as powerful.
ITALY IS WORLD KNOWN as the country of lightweight motorcycles, yet oddly enough, its present grand prix racing bikes are only of the medium and large capacities. Gone are the 100cc and 125cc Ducati desmodromics, the 125 and 175 Mondials, the 125 MV (all double overhead cam machines that achieved immense success in the fifties).
SIXTEEN YEARS AGO, the SCTA (Southern California Timing Association) hot rod club organized the first Bonneville National Speed Trials, and as a result of their enterprise, the Bonneville Salt Flats were opened to the average automobile enthusiast.
RECORD CROWDS, MOSTLY members of the younger generation, thronged the three-day Autorama sponsored by the Michigan Hot Rod Association, presented in the magnificent Cobo Hall. Attendance was up 20% over last year's show. In addition to the many weird cars were 25 motorcycles competing for the various class awards for two-wheelers.
Your Round Up column in the February issue struck me close to my heart for I am one of those pseudo policemen that scare people. When I have to stand in the middle of an intersection, stop cars, reposition cars and prevent people from breaking in the middle of a procession, it makes an irate motorist out of even the best of them.
THIS SPRING A NEW JAWA Sports model will appear in the rough European moto-cross events in an all-out bid to regain the lead in that highly competitive form of racing. It features a new twincradle frame design, the results of years of research and testing, and a new engine that is also not a descendant of any previous Jawa unit.
A RECENT LETTER from the Berliner Motor Corporation informs us that Mr. Joseph Berliner has commissioned Ducati to design, develop and manufacture an all-new, large-displacement touring/ sports motorcycle.
Flattrack racing is on the rise in California. No sooner had J. C. Agajanian announced that the weekly half-mile oval season at Ascot Park in Gardena would begin on Friday night, April 3rd, than word came from Jim McLennon, owner of the new Champion Speedway, just south of San Francisco, stating that the Northern California half-mile season is slated to start the last Saturday night in March and continue weekly through late October.
THE MANUFACTURERS' ASSOCIATION predicts another record year for Japanese motorcycle makers in 1964, and expects exports to top the 606,000 mark, a whopping 40 percent over last year's figure. A 20 percent increase in production, up to 2,400,000 machines, was also foreseen by the Association in an announcement of 1963 production figures made early this year.
THE NEW Aermacchi/Harley-Davidson 250cc scrambler announced in the February issue of CYCLE WORLD is an "over-the-counter" model already on sale in Italy at the price of 520,000 Liras. The Italian factory states that up until now no requests for this machine have been received from the U.S.
PERHAPS THE HEADING is a misnomer this month and the title should read inter-continental ballistic missile as comment has to be made first and foremost on the United States Grand Prix held at Daytona. Perhaps by now you will have fully recovered from the chaos and confusion of being invaded by the F.I.M. and you could be forgiven if after this meeting you decided that you wanted nothing to do with the F.I.M. again.
THROTTLE-HAPPY mortician Marshall "Digger" Helm started the 1963 season with a national number plate after five years of competing in everything from scrambles and hillclimbs to road races. Obtaining his first machine in 1957, he entered his initial AMA competition, a hare scrambles, in June of 1958, finishing 15th in a field of 47 riders.
THIS IS BEING written from Daytona Beach, where the World Championship races have just concluded. To us, apart from the thrill of meeting international riders in person, the event was almost like a Canadian road race, since we saw so many riders at Daytona who compete regularly in our events at Mosport and Harewood.