TEN YEARS AGO,almost to the day, CYCLE WORLD's co-publisher (my wife B.J.) and I left Road & Track magazine to set off for Europe on a year-long spree of carefree fun and frolic. After we had our fling (it was worth every minute of it), we returned to Southern California and the publishing business.
I own a Hodaka 100 which runs fine. It has an expansion chamber on it, which is great, except for one thing. It is impossible to clean. I have tried sticking brushes down it, but the carbon inside still won 't come out. I have some friends who have the same problem, and we would appreciate any information On how to remove the carbon.
I was disappointed to note that an otherwise excellent road test of the Triumph Tiger 650 model (CW, March 69) was spoiled by two rather serious errors. The reference to the improvements in the Amal concentric carburetor on page 50 is accurate up to the point where it is stated that “unfortunately for those that own the old concentric, these improvements are not interchangeable and an entirely new unit must be bought.”
ITALY-beautiful, fantastic Italywhere anyone with half an appetite can easily gain five pounds in a week. For the tourist, Italy is the land of pasta and a liter of wine for lunch, with pasta and two liters of wine for dinner. For a true motorcycle enthusiast, though, Italy is more than pasta and wine.
Special Report: The Moving Forces Behind Motorcycle Legislation
NATIONAL HIGHWAY SAFETY BUREAU (NHSB)
J. BRADLEY FLIPPIN
THERE HARDLY EXISTS a motorcyclist who has not heard of the various pieces of legislation that have cropped up in the U.S. The one that has stirred the biggest controversy is, without a doubt, the compulsory helmet law. Have you ever wondered what brought all this about?
The New 405-cc Motocrosser Must Rate As One Of The Best Weapons Ever; The New Enduro Model Offers Powerful Good Surprises.
THE BIRTH OF the 500-cc class two-stroke revolution in motocross racing began when racers started looking at their stopwatches and noticing that the predominately ring-ding 250 class was going nearly as fast, and sometimes faster, than the 500-cc class, which was made up primarily of full-size four-strokes.
THE GRAND CANYON: Monumental Challenge for Man and Motorcycle
I FIRST SAW Cape Solitude in the fall of 1952, when I was training to be a Grand Canyon bus driver and sightseeing guide. From the Desert View Watchtower at the east end of the canyon, my instructor conducted his tour as usual, swinging an arm in a counterclockwise arc and commenting on various landmarks.
Fabulous Handling And Braking Mark This Heavyweight For The Enthusiast
SOME PEOPLE THINK caverns are reserved solely for truffles, troglodytes, and an occasional spelunker; not so. Royal Enfields are made in caves underneath England. Inside a vast complex of tunnels and caverns hewn from the earth during World War II, where the temperature stays at a constant 58 degrees year-round, men are hard at work assembling motorcycles for the Surface People.
TWO TRADITIONAL APPROACHES TO ENGINE DESIGN (destined for limbo)
STATE DESIRED BRAKE HORSEPOWER AS A FAIT ACCOMPLI AND TRY TO BUILD IT "SCIENTIFICALLY" BEFORE THE MONEY RUNS OUT THE SIREN CALL of road racing, which has lured more than a few engine projects onto the rocks in the past decade, wails once again in the British Isles.
CASE NO. 45-0-39 W.V.," said the doctor. "W.V.?" questioned the young intern. "Webley Vickers Mitty syndrome. It's quite prevalent these days. It's a side effect induced by overpopulatamous neurosis," answered the doctor. "Nurse, where is the patient?" “Catatonic Ward B, Dr. Hyde,” replied the nurse.
ONLY THE MAN who has had his motorcycle stolen from him knows that futile feeling. Return to the parking place and find it empty. Maybe I parked it on the next street. No, it's gone! Call the cops. Okay, buddy, we'll do what we can. Stand in the hollow echo of the phone booth, and sense the safety helmet dangling uselessly from your hand.
The Contemporary Scene-1953 to 1967The Days of Many Cylinders and Horrendous Revs
only logical considering their 20-year investment in designs that were still winning races. Velocette brought out dohc heads for their works racers, and the massive 10-in. diameter fins set a new fashion for engine cooling. Norton went from 21to 19-in.
IF YOU have been riding motorcycles for the past five, 10 or 15 years, you might justifiably protest that, from your experience, it is highly unlikely the episodes I relate could occur. And, looking back 15 or even 20 years, you would be reasonably correct.
SEVERAL MONTHS back, CW spies had reported that there was to be a new small-displacement Honda. Then, at the Las Vegas Dealers’ Show in February, our scrutiny of the inscrutables paid off. The motorcycle is the Honda SL 90, a jazzily chassied off-the-road bike, based on the ohc 89-cc Single.
Rall Scores An Upset As Briggs Bogs; Van Leeuwen Wins The TT (Ho,Hum), But Watch Those Teeny-Boppers!
THE INDOOR TT
EVERYTHING about the Houston Astrodome short track national was as big as could be. The setting was big, the pre-race promotion was big, the entry list was big, so were the prize money and the attendance figures. And the riders unanimously agreed that the bumps and ruts in the pear-shaped track were by far the biggest they had ever encountered on any of the national dirt track circuits.
THE CYCLE WORLD Motorcycle Show last year broke a11 atten dance records for two-wheeled vehicle shows in the U.S., and placed itself among the largest and best consumer shows in the world. Included in that show for the first time was a national exhibit by a foreign country, the Republie of West Germany.
IN A SINGLE HORRENDOUS DAY WITH MASOCHISTIC FREAKS, DING-A-LINGS, LEECHES, STINKING WEATHER AND OTHER ADVERSITY, IT MAY BE DEMONSTRATED UNEQUIVOCALLY THAT ENDURO RID1NG IS A BUMMER.
THE OLD Volkswagen bus, which I am driving until I can afford an automobile, whined along at the unreasonable speed of 52 mph. Behind me, the Bultaco gently rocked, sloshing gasoline out of its tank onto the rubber floor mat which was disintegrating.
Mark Brelsford, last year’s high point Amateur in the AMA, surely is the most promising new Expert rider this season. He was dnf at the big Ascot 100-lap TT, which traditionally opens the professional year in California, but only due to misfortune.
To help pack more air into those Keihin carburetors, Daytona Products offers 350and 450-cc Honda owners new, dynamometer-tuned velocity air horns. The manufacturer claims that these easily installed items will yield a minimum of five percent more power. The spun aluminum units retail for $4.75 each. Daytona Products. Inc., Dept. CW-5, P.O. Box 668, Reseda. CA 91335, will answer further questions.
Daytona Products. Inc.
FIVE-BHP MINI KIT
Michrina Enterprises, Inc., Dept. CW-5, 11859 Levan Rd., Livonia, MI 48150, says that its model 5000-KX is the only high powered and fully sus pended minibike available in kit form. It comes with chrome, fold-down handle bars, 6-in, wheels, chrome chain guard and fenders, and is powered by a 5-bhp Briggs & Stratton engine. The 5000-KX sells for $l99.95 and the assembled model, the 5000, for $229.95.
Daytona Products. Inc.
650 VALVE KIT
After 1966 engine No. 24875, Triumph valve springs were changed along with the lower base cups. Because of this, most racing-type valve springs would no longer fit the altered springs cups. Pre cision Machining has come up with a solution to this problem. It is a racing valve spring and alloy collar kit for 650-cc models. The new valve springs are made of ground silicon chrome wire and are shot-peened, burnished, and pre-set. The alloy collars and keepers are the same as described in Kit No. 6110. When com pressed, the inner spring pressure is rated at 100 lb. and the outer spring at 145 lb. Instructions are supplied with each kit, part No. 6100. The price is $19.95 (California residents add 5 percent sales tax) from Precision Machining, Dept. CW-5, 1209 Montgomery Ave., San Bruno, CA 94066.
Daytona Products. Inc.
FLASHLIGHT CIRCUIT TESTER
A valuable adjunct to any mechanic's toolkit is this product from Webco. It is a continuity tester and flashlight combination. It is very useful for detecting short circuits in electrical wiring. checking point gap, and just poking around in general. The tester uses standard "D" cell batteries and is incorporated in a nonbreakable flashlight. It may he ordered directly from Webco, Inc., Dept. CW-5, P.O. Box 429, Venice, CA 90291.
Daytona Products. Inc.
Rickman Metisse components are now available for Yamaha DT-ls. Those who already own DT-ls and want to convert might choose the Metisse Mark IV Kit. This includes the frame, swinging arm and spindles, fiberglass components. rear brake lever and cable, saddle, air filter, a set of 20 chain adjusters, fuel petcock, engine mounting plates and studs, and handlebars. Also, both left and right brake pedals are provided, to allow a choice of shift locations. Included in the kit are all vital nuts, bolts, washers. and an engine sump shield. Also available is the Metisse Mark IV Chassis. This includes all of the above parts, plus Rickinan magnesium hubs, nylon-lined cables with Magura levers, Ceriani forks. Girling rear suspension, rear wheel with a 4.00-18 knobby tire, front wheel with a 3.50-19 trials or 3.00-21 sports tire. Prices are $597 for the kit, $1096 for the chassis, and $68 for the Yamaha Metisse expansion chamber. The frame is nickel plated and fiberglass parts are pigmented in U.S. Racing Blue. For further information, write Steen's, Inc., Dept. CW-5, Box 2276, Alhambra. CA 91803.
With Mike Hailwood having decided to go car racing this year, it looked as if two of the 1968 grand prix aces would be missing this season. But Bill Ivy (who so determinedly retired last year and bought a Formula IV racing car) has had second thoughts and signed to ride the Jawa four-cylinder 350-cc two-stroke in the world championship series, when it does not clash with his car racing.
Even motorcycles are used as effective weapons in the Vietnam war these days. Recently, high officials of South Vietnam-ministers, generals, etc.-were attacked by guerillas riding on mopeds. As the officials were escorted by jeeps, it was difficult to chase the two-wheeled attackers through the crowded city streets.
Laverda has taken another step in the development of its big Twin. The model was first introduced at the 1966 London Show. By the end of the following year, it was also offered in a 750-cc version, the GT. Currently, the 650 model is to be dropped in favor of a new 750 Sport version.