I have just finished reading your interesting article on the two-stroke engine. In the course of so doing an idea came to mind: why would it not be possible to provide a passage from the crankcase to the cylinder through the top of the piston?
Most of the newspapers of the world recently splashed a picture of Britain’s Princess Margaret and her husband. Lord Snowdon, former society photographer Anthony Armstrong-Jones, riding a motorcycle with the Princess’s skirt raised above her knees.
THE NAME “ISLE OF MAN” conjures up for the enthusiast a dream of the world’s finest motorcycle road course where brave men pit their skill and guts against 37¾ miles of difficult bumpy roads that have everything including a 120 mph-plus descent between kerbstones, a 1300 foot climb up a mountain and numerous high speed leaps that led one rider to remark, “it’s the world’s fastest moto cross.” To practice means getting up at four o’clock in the morning for the roads are closed between 4:45 and 7:30 AM for that purpose.
JUST ABOUT the hottest category in motorcycling today, in both street and competition, is the 50cc class. Just five years ago no one connected with motorcycling would have agreed had anyone predicted the fantastic surge of interest shown in machines of this minute displacement category.
BELLA ITALIA, beautiful Italy, is the spiritual home of all the world’s sporting conveyances. They discovered the joys of chariot racing thousands of years ago, and to this day Italians prefer speed on wheels to almost any other form of sport.
FOR MANY A YEAR, one of the most popular models in the fast-selling Triumph line has been the “Tiger 100,“ their 500 cubic centimeter vertical twin. Sports riders, engaging in many and sundry forms of competition riding, liked it because it met the 500cc limit often imposed on engine size and was, more important, capable of winning almost any race in which it was entered.
THUS FAR, in this series on the two-stroke engine, we have covered overall fundamentals, and have gone into combustion chambers and cooling. Among the things explained was the fact that vast benefits can be gained by employing the highest possible compression ratio — and that if this is carried too far, the engine will fail.
THE AMA’S 400-mile, 16th annual Greenhorn Enduro, held in the desert and mountain regions of Southern California, was won this year by veteran rider and Green horn expert Max Bubeck, riding an Indian 500. The two-day run, which actually measured 445 miles, started at Pearblossom, a tiny desert community about 70 miles north of Los Angeles, Calif., and saw 170 entries take off at one minute intervals onto the course laid out by the Pasadena Motorcycle Club.
TO those of us who have been around motorcycles for many years the current growth of interest in what are becoming known as “trail vehicles” is a bit amusing. After all, this is what we have been doing since the first two-wheeled vehicle with an engine was built; well, almost anyway.
FIRST MAN to credit himself with thirty points in the AMA National Enduro ratings was John Penton of Lorain, Ohio, when he scooted home with the high point trophy in the Fifth Annual Little Burr Enduro. The event, sanctioned by the AMA as the 250-Mile National, took 227 riders south of Columbus through scenic southern Ohio.
BART MARKEL, popular Harley-Davidson rider from Flint, Michigan, came out on top at Heidelberg Raceway near Pittsburgh, Pennsylvania in the 15-mile National Championship dirt track race held June 10th. Markel also had the day’s fastest time trial, turning the half-mile oval in 23.95 seconds.
THOUGH bearing a name that would indicate otherwise, the Rabbit Superflow is a remarkable and interesting scooter that can boast of innovations and features rarely, if ever, found on modern day scooters. Disregarding, for the moment anyway, the very attractive body shell, it is the mechanical nature of the Rabbit that aroused most of our enthusiasm.
SPARK PLUG CARRIER An interesting accessory that adapts very well to motorcycle use is this aluminum holder/carrier for extra spark plugs. The plugs screw into threaded holes. It can be cut in half if four plugs seem like too many to carry, will mount almost anywhere on the frame of a cycle or scooter. The price is only $2.95, from MG Mitten, Dept. W, 1K3 East Green St., Pasadena, Calif.
NEW COMPETITION FUEL TANK A new fuel tank is now available in the U.S., designed for competition and custom use. Model “A" features a stream-lined shape, extra large frame channel and long universal mounting brackets. Two petcock fittings, ¾ gallon size with cap is priced at $19.95, 1½ gallon size with cap is $21.95. Model “B” is lighter gauge and has one petcock fitting, 1½ gallon; the price is $15.95. Petcocks are $2.25 each. Distributed by Cosmopolitan Mtrs., Inc., Dept. CW, 5521 Wayne Ave., Philadelphia, Penna.
LIGHTWEIGHT RACING SEATS Custom Plastics Assoc, now offers this new fibreglass racing seats for light-weight machines. The seat not only provides a proper perch for road racing but enhances the appearance of the bike as well. Price complete with upholstery is $17.50, or $12.50 without. Write Custom Plastics Assoc., PO Box 316, Pasadena, California.
BSA GOLD STAR VALVE SPRINGS Heavy duty valve springs for BSA Gold Stars have been especially designed to cure the valve float problems encountered during severe competition. The kit is supplied with inner and outer valve springs, lower valve spring cups, and top collars. The Webco part number is 1096, priced at $15.95. From Webco, Inc., Dept. CW, 218 Main St., Venice, California.
QUICK CHANGE ALLOY SPROCKETS This item is a correction of the sprocket illustrated in the Tab-Loc firm's advertisement that appeared in the July issue of CYCLE WORLD. The sprocket, pictured above, is one of their new aluminum alloy sprockets that employs a unique double split system that requires no bolts to hold the split. This makes dropping the rear wheel unnecessary to change sprockets. A puller is supplied with sprockets. Shown is a 72-tooth overlay type for 36and 40-tooth overlays on Honda and Yamaha 50cc machines; the price is $12.95. For full information write to Tab-Loc Products, Dept. CW, 6234½ North Irwindale Ave., Azusa, California.
I have a problem that I am sure is shared by many others. What are the secrets of a leak-free motorcycle? It seems that no matter how tight I tighten things, or how much gook I plaster on the gaskets, it still slobbers oil all over itself. C’mon you guys .
THE opening of the Canadian racing season shows that events this year will be very hotly contested. In Eastern Canada, two of our courses have already been in action, Mosport and Harewood. Mosport is a 2.5-mile road course with hills and interesting turns, while Harewood is an airport circuit, wide and flat and with artificial chicanes to make the racing more interesting.
"DETERMINATION PLUS” is a very necessary attribute to any potential World Champion and Gary has certainly the right qualification in that direction for he came to Europe to race motorcycles in 1958. Unlike others who have come here with that intention.
ROAD RACING is now in full swing and 1962 looks like a real vintage year—the best, in fact, since the tragedy of 1957 when we last heard the sound of the Gilera four and the fabulous Guzzi V8. The last named machine was such a powerful device that at certain parts of the Isle of Man course it was necessary to shut off to prevent lifting the front wheel where other machines were being accelerated to the maximum.