HONDA TRAIL GUIDES are the latest thing to come from the omnipotent American Honda Motor Co. Trail Guides are for those who spend endless week-ends in Southern California searching for open areas in which they can ride. Since so much land is steadily being closed, the guides are an invaluable aid.
A suggestion, if it’s not out of line. How about a contest to think up a slogan and emblem to encourage quiet operation of motorcycles? Such as "Muffle up and make friends." It could spread to snowmobiles, ATVs, dune buggies, etc. It is always good to start something good, like a better image for cycles.
A new, independent racing team will mount a serious challenge to the East Coast’s established motocross stars in the coming professional racing season. The Cycle Sports Center, a retail motorcycle shop and mail order business in Binghamton, N.Y. has contracted the services of two riders and a team manager/tuner to form a highly organized effort to compete in the professional motocross circuit to date.
In connection with your specification figures on various machines, I have a question to ask. I have sometimes checked them and found a considerable disagreement as to your computed top speeds at a given rpm. For instance, in your February 1971 issue for the Yamaha RT-1B on page 41, computed top speed in gears at 6500 rpm is: 5th, 73; 4th, 57; 3rd, 44; 2nd, 32; and 1st, 22.
May I add my two cents to what Richard Kennedy and Robert Bausch have said about the Norton Commando (February issue)? I own a Commando and have put quite a few miles on a Honda Four, and would have to admit that in any objective analysis the Honda is the superior machine.
IN THE February issue of CYCLE WORLD this column took to task the American Motorcycle Association Competition Congress for not taking a harder position on the restriction of noise in all Sportsman (now Amateur) competition. In the May issue I went after the dealers about using more discretion when selling machines with full expansion chambers, or converting to loud exhaust systems for non-racing purposes.
Yes, Virginia, There Is An Alternative To The Electraglide Or The BMW.
IT'S A GOOD THING that tastes differ. Where, for example, would Moto-Guzzi be if everyone insisted on riding light, nimble motorcycles? Light and nimble the Ambassador ain't. The big 750 is tank-like, in fact, and therein may lie a clue to its appeal.
When $6500 Waits In The Tower, A Winner Not A Record Holder Be!
BORIS MURRAY, the nation's current top speed record holder for the quarter-mile (166.35 mph), blasted his twin Triumph to a 9.47 elapsed time victory (159.85 mph) over favored David Campos in the final round of Top Fuel Eliminations at the NHRA sanctioned, second annual United States Fuel and Gas Motorcycle Nationals, held at Irwindale, Calif.
IN THE MIDST of this era, a young man, who had recently moved to Southern California from Buffalo, N.Y., rode his Vincent motorcycle to spectate a drag event at Pomona, Calif. He was a mechanic by trade and machinery and competition had always held a special fascination for him.
Suzuki's Latest 250 Roadster Is Bullet-proof. It Shares The 350's Crank Assembly. And Two-Up May Find Happiness Thereon.
IN 1965, the Suzuki X-6 was just about the fastest 250 two-stroke Twin to be had. CYCLE WORLD'S road test of the first X-6 in the October, 1965 issue showed a 15.3-sec. standing quarter-mile with a trap speed of 84 mph. An impressive 92-mph top speed was attained, a good speed for most 350 machines then available.
ENGINE DISPLACEMENT is a relative thing. Ideally, a powerplant should be large enough to do the job at hand, but no larger. It is a practical theory, but in reality, most bikes fall into certain classic displacement categories—125, 175, 250, 500, etc.
He did it last year on a Honda. He did it this year on a BSA. And both times, Dick Mann's strategy was the same. Hang in there and wait for the jackrabbits to break. Which they did. First came the opening two-lap chase after Cal Rayborn's quick accelerating factory Harley, which ended as his gearbox failed.
Land Closure Got You Down? Got Those Anti-Motorcyclist-Horsemen-Get-All-The-Breaks Blues? Then Check Out The Mistakes And Successes Of This Enterprising Group In San Mateo County. Mustering 25,000 Votes To Bounce An Unsympathetic Politician Out Of Office Is No Easy Trick— But They Did It!
14-YEAR INCUMBENT DEFEATED
RESULTS SANS PUBLIC DONATIONS
IT ALL BEGAN WITH A SURVEY
PLAN ONE, FAILURE ONE
CYCLISTS ON TRAILS COMMITTEE
200 CYCLISTS SHOW CONCERN
EQUAL REPRESENTATION DEMANDED
KICKED OFF COMMITTEE
SO WHAT WAS THE PLAN?
5 YEARS, ZERO RESULTS
ANSWER: ORGANIZED VOTING
LAND CLOSURE IS no longer a problem that we can put off. It is reality. It is widespread. But, it is not a hopeless battle, as the motorcyclists of San Mateo County have discovered. ITEM: There are an estimated 40,000 motorcyclists in California's San Mateo County.
Some Rewarding Potions Made With Alcohol & Gasoline, Straight Or With Chasers.
THE GASOLINE-BASED FUELS
BECAUSE OF THE FUEL restriction imposed in many sanctioned motorcycle races, the subject of fuel modification has not become a popular topic in the world of cycling. This article is therefore offered to the weekend warrior who looks for competition in his off-the-road trailing.
Would You Like To Participate In A Fascinating Research Project? Fill Out The Questionnaire And Mail To The Address Indicated.
IN THE BEGINNING, man’s very existence depended on physical activity. Foolhardy adventure meant almost certain death. But, through calculated risks, early man was able to secure food and shelter. Today, neither strenuous physical activity nor calculated risk is necessary for survival.
The Cam Is A Timing Device...Part Of A Valve Train Which, In Its Multitude Of Forms, Layouts And Profiles, Deals With The Problems Of Mass, Velocity, Time, And Gas Inertia.
THE CAM, inherent in the operation of a four-stroke engine, is one of the most talked about, yet least understood, components. Basically, a cam is a timing device, controlling valves which admit a fuel/air mix into the combustion chamber and allow burnt gases to exhaust.
We Venture Into The World Of Camshaft Esoterica, Where A Little Means A Lot, If Going Faster Is The Goal.
CAM LOBE DESIGN
PROCESSING A CAM
THE VALVE SPRING
INTAKE AND EXHAUST TUNING
WITHIN THE SHORT SPAN of three years, Norris Performance Products has grown from a two-man operation to one of the most respected names in racing cams for both automotive and motorcycle engines. It's still not a large company, but it is growing steadily, and is constantly improving its products.
SINCE BSA SWITCHED their 500-cc and 650-cc Twins to the unit-construction-type engine, their popularity has grown quite a bit in this country. While some things have been made easier for the home mechanic, there are a few things that one finds when stripping one of these engines that could have been improved upon.
ONE OF THE WORLD'S unique museums, housed in a quaint old sixteenth century castle, is located at Augustusburg, in East Germany, behind the "iron curtain." The area, called Erzgebirge, which means the ore mountains, is a beautiful setting with a deep green forest, alpine meadows and tall mountains.
Vic Eastwood is the latest motocross man to join the AJS factory and will assume the role of development engineer and rider of the works 250-and 410-cc scramblers. He joins the Swedish rider Bengt-Arne Bonn who will contest the world series in the 250 class.
New from the Leatherwerks are these three way combination pouches, designed to fit the gas tanks of all BMWs and Honda Fours. Leatherwerks pouches are completely hand made to order from 8 oz. chrome tanned latigo hides. Sewn with waxed nylon cord, they are double stitched at points of stress. Nickel plated roller buckles and rivets are featured, and inner flaps prevent small items from working out. Available in either black or brown, Leatherwerks pouches cost $74, postpaid. The side pouch combination alone sells for $52. All units are felt backed. When ordering, specify make, model, year and color desired. Send orders to Leatherwerks, Dept. CW-6, P.O. Box 917, Tarzana, CA 91356.
COMPETITION FORK DAMPER KIT
Fun'N Fast, following up their competition fork dampening kit for Yamaha AT-1 and CT-1 models, has developed a fork dampening kit for Yamaha DT-1C, DT-1M, RT-1 and RT-1M models. The manufacturer guarantees that this kit will add a full 1¼ in. of travel to the stock forks fitted to these models. Kits contain two extra strength steel dampener rods with turned steel ends, and two heavy-duty, cadmium-plated booster springs. Easy to follow instructions and an Allen wrench of the proper size for assembly are included. Suggested list price is $34.95. For additional information write to Fun 'N Fast, Dept. CW-6, 18550 Parthenia St., Northridge, CA 91324.
Avon's new BMW fairing, distributed by Butler & Smith Inc., is designed to fit all/5 models. The manufacturer claims that these fairings offer the least wind resistance of any on the market. A chrome steel safety bar is an integral part of the unit. Strong, resilient fiberglass is used, and complete mounting hardware is supplied. Three colors (black, white or polaris silver) are available. Avon model AV 70-1 fairings may be purchased at all authorized BMW dealers.
Hero Belt is a new product offered by The Dirt Rider to serve the emergency situation, whether it be towing a stranded rider or holding up your pants. The belt is easily taken apart to become an 8-ft.-plus-long braided nylon rope with a breaking strength of over 1000 lb. Construction of the buckle closure is a strong, 20-in. nylon webbing strap, which also has some utility in an emergency. Two sizes are available: small, fitting 28-to 34-in. waists, and large, for 36-to 42-in. waists. Price is $3.75, postpaid. Order from: The Dirt Rider, Dept. CW-6, P.O. Box 14422, Albuquerque, NM 87111.
Flanders is offering their motocross series handlebars in four new shapes. Composed of seamless-redrawn tubing, the bars are capable of withstanding a great deal of punishment, and the center sections have been knurled to prevent slippage during stress. The bars are very wide to allow for modification with a hacksaw to suit personal preferences. All four shapes are available in chrome, with or without a crossbar, and in anodized black, with a crossbar. Order by part number G-1, 2, 3, or 4. Retail price is $12.75 without crossbar, and $15.75 with crossbar. For more information, write Flanders Co., Dept, CW-6, Box 2297d, Pasadena, CA 91105.
PACER'S NEW PLUG PRODUCT
For those dual-purpose Yamaha Enduro models that must perform well in both on-the-street and off-road conditions, Pacer has designed a pair of plugs which will help them do just that. The plugs will fit all models from 125 through 360cc. Made of machined aluminum, they fit exactly into the holes where the tachometer and speedometer drive cables have been removed to lighten weight of the machine for off-road competition. The O-ring seals are used to assure more complete protection against dirt and mud entering the works. The tachometer plug (photo left) has a milled flat for indexing on the engine, and both plugs are retained with the stock clamps. Retail price per set is $3.39, available only through selected motorcycle dealers. For more information and a color brochure of other products and accessories available through Pacer, write Pacer Consolidated Industries, Dept. CW-6, 17841 E. Valley Blvd., City of Industry, CA 91745. Enclose 25 cents for handling and specify item number G-6.
CUSTOM FLAG TANKS
The latest creations from the Fiberglas Works are these hand-laminated, custom styled gas tanks which carry a lifetime guarantee. The color-impregnated white and blue metal-flake designs will never fade or wear off. All tanks feature universal center mounts with either 1-, 2-, or 3-in. tunnels. In most cases, they are bolt on items for H-D, Honda, Triumph, and BSA models. Each tank comes with two petcock fittings and is priced at $64.95. A special fiberglass American flag-designed sportster rear fender is also available at $34.95. All are manufactured by the Fiberglas Works, Dept. CW-6, 2600 Soquel Ave., Santa Cruz, CA 95060.
HODAKA BIG BORE KIT
Owners of 98-cc Hodaka motorcycles (Hodaka ACE 100, ACE 100B, and ACE 100MX) now have available to them a 125-cc conversion kit, offered by Webco Inc. The fully race-tested kit offers an approximate increase of 25 percent in power. Coupled with its extreme light weight, it should prove to be competitive in its class. Due to the increased finning on the Webco "Big Bore" cylinder barrel and head, the engine will be more able to utilize the increase in power without overheating. Included in the kit is an all new alloy head and cylinder, a 56-mm piston, and all gaskets, nuts, bolts and washers necessary to completely install the unit. The part number is 2141, and price is $129.95. Available through motorcycle dealers throughout the U.S. and Canada.
SPECIAL ENGINE STAND
Joe Bolger Products has created a special engine stand to facilitate engine overhauls. Constructed of heavy-gauge square tubing, the stand has been strength tested to 800 lb. successfully. It is equipped with a locking caster of the forward leg, and the drain pan stand pulls off to make it possible to flush cases or run the leg under a bench. The cases can be split and a complete overhaul can be carried out without removing the engine from the stand. Mounting the engine is made easy by dropping the stand to its lowest position. The engine can be rotated a full 360 degrees, and raised or lowered through a 45-degree range. An adapter to attach the engine to the stand has been built for the 750 Honda, and it can be used for other Honda units as well. Any engine from 50 to 1200cc's can be attached by simply bolting the particular adapter to the stand. Rotating and vertical adjustment possibilities are infinite; there are no holes, pins or "slop" to bother the mechanic during critical operations. The stand is immediately available and can be shipped on short notice. For further information, mail inquiries to Joe Bolger Products, Dept. CW-6, Summer St., Barre, Mass.
Allen Bros. & Co. has announced a unique method of protecting or carrying the safety helmet. The "Helmet-Lox" is a heavily chrome plated, all steel bracket that can be mounted on most front or rear fenders and locked in position for complete protection of the helmet. Just 12 in. of fender space is needed to attach this useful holder. Retail price is $12.95, postage paid. Write to Allen Bros. and Co., Dept. CW-6, Rt. 1, Box 982-A, Dallas, TX 75224. Dealer inquiries are invited.
TRAIL-BREAKER MARK IV
Rokon, Inc. is offering the Trail-Breaker Mark IV, an all-terrain vehicle equipped with two-wheel drive. A smaller version of the Explorer Mark III, it is capable of maneuvering at speeds as slow as 1/2 mph. Top speed is 30 mph. According to the manufacturer, it will climb a 50-degree slope. A new automatic torque converter aids ease of handling. No shifting is required. The extra wide, low pressure tires, which leave less of an impression in dirt than a man's footprints, should appeal to conservationists. Additionally, it is equipped with a U.S. forestry qualified muffler, and can be registered for road travel, with options. For further information, write to Rokon, Inc., Dept. CW-6, 160 Emerald St., Keene, NH 03431.
Sudden flat tires that can prove disastrous to motorcyclists can be prevented with the addition of No-Flat, manufactured by Tesco Products. Following the insertion of four ounces of No-Flat in a motorcycle tire (eight ounces are required for automobile tires), the manufacturer claims that punctures up to 1/8 in. in diameter will be sealed instantly for the life of the tire. No-Flat can be used in extreme climactic conditions ranging from intense desert heat to freezing Alaskan weather. It is odorless, nonflammable, water soluble, and cannot affect wheel balance. Distributed by Marketing Consultants Ltd. of Calif., No-Flat costs $1.95 per eight ounce bottle.
How to Increase Motorcycle Performance
How to Increase Motorcycle Performance Through Better Lubrication Techniques is now available to all motorcyclists. Proper lubrication techniques are a mystery to many riders. This booklet explains the most effective uses and the basic differences between chemical, petroleum and bean based oils. Useful information on proper oil/gasoline mixing ratios and some basic ideas for improving the effectiveness of oil injection systems are also covered. Simply send a stamped self-addressed envelope to SCO/MAR Enterprises Inc., Dept. CW-6, 15720 Ventura Blvd., Encino, Calif., or ask for it at your local dealer.
Aermacchi unveiled their new 250-cc two-stroke racing Twin exactly 10 years after the introduction of their now legendary 250 four-stroke Singles. This new model, also called the Golden Wing, was straddled recently at Modena by Renzo Pasolini, who has returned to Aermacchi after four years with Benelli.
Kawasaki is continuing their three cylinder scheme with the new 350 SS. What is more, a 250-cc version may also be in the works. Actually, Kawasaki's new Three displaces 347cc. Bore and stroke of the near square unit is 53 by 52.5mm. Redline is 8500 rpm and 45 bhp is produced.