Cycle News - Archive Issues - 1970's

TITANIUM OUT Tom Clark, Director of Professional Racing for the AMA, announced recently that titaniam will not be allowed in the construction of frames, axles, or other parts of motorcycles used in AMA competition. Investigation shows that this material has a tendency to crack in areas where it has been scratched or dented. This with the fact that titaniam can only be welded under ideal conditions, and by highly trained people with special equipment, does not make it practical for common usage, he reports. _AMA COMPETITION CONGRESS SCHEOULED TO MEET IN MID·NOVEMBER The fourth annual Competition Congress of the AMA is scheduled to meet Nov. 16-18 at the Imperial House North in Columbus, O. The Congress is comprised of representatives of the voting AMA Class B members, representatives of tlte professional riders, and delegates elected from the thirty-three geographical districts of the United States. Its purpose is to consider all motorcycle activity coming under the jurisdiction of the three AMA rule books governing road riding, amateur activity, and professional racing. Activities will begin Monday evening, November 15, with an open question and answer session for Congressmen and the press. Official meetings begin Tuesday morning when all AMA staff department heads deliver annual reports to the Congress. The Congress adjourns Thursday evening, . ovember 18. SILVERTHORN UPSETS LARSSON By Allen Greenwood DEHESA, CA., May 9, 1971 - Bill Silverthorn delighted a Mother's Day crowd as he out-dueled fellow Husky rider Lars Larson for an overall Open Expert \vio. In each of Bill's three motos, he was forced to come from behind. On the other hand, Lars gave everyone a lesson on the art of the start. Lars would position himself on the outside pole, thus setting himself up for a straight shot at the fLJ'st turn. It not only puts Lars out in front, but it forced Silverthorn to play catch up for the first several laps of each moto. Watching the first two motos was like an instan t replay on television. Larson would grab a lead and Silverthorn would pass some slower riders and overtake Larson in a wheel to wheel battle to the checkered flag. With two firsts to Bill's credit, the final moto shaped up for a possible Silverthorn hat trick. Lars must have decided two second place finishes were enough. The green start flag signaled a beautiful Larson gate job on the field. Silverthorn, who found himself in third place, fought by Curt Smith (CZ). Larson was determined not to let the ever-present charging Silverthorn past. Lars proceeded to ride a faultless final lap to take the first position.. Overall it wasn't enough, as ilverthorn's two first earned him the overall win. Most spirited rider of the day award surely must go to Novice 100 rider James Ryle (MB), who rode over two laps without his seat - ouch! Bob Bramlett, the boy from Idaho, must like it down here. Bob picked up another trophy in the 250cc Novice n. Steve Waller captured the 250cc Noice 1 honors. Jamey "Scotter" Blunt had a good nigh t picking up another first in the 175-200cc class, and a second place finish behind Mike DuBont in the 100cc Amateur-Expert go. A few Novices are starting to look Perris Amateur ratings right in the eye, PENTON WINS MOTOCROSS Golden Ea91es MX Park Dallas, Texas April 25, 1971 125 Senior A 1-2-3 SWEEP Ole Finstad Sam Menefee Jeff Krin9 and wins... '" '" . > '" w ;!: Z W ..J U > U Little Danny Whitt, age 13, put the scare in to h is fellow 100 Novke competitors, showing promise as a future expert. Mounted on his Honda Motosport, Danny sounds like Jeff Smith on your heels. Danny's little four stroke may have been out horsepowered by the Hodakas, but he backed his big sound with a well-placed second behind Rolland Gi1Jmer. Somebody, someday is going to make a 125 Super Expert class for Eric Crippa. Eric simply powered his way to another weekly untouchable three-moto lead. Watch out, Eric, or Puch may bring back their factory riders! (Results on page 26) Ken Miller, Novice Moto winner; Mark Reichert, 125cc ovice winner; and Rex Hailey, 100cc ovice I winner. Lahn Barr, a new face to the winner's circle picked up the trophy for his 100cc Novice II win. Mini-Cycle' winners were Ricky Hart and Wayne Long. Donald Keeling and David Jones took the two Divisions of Mini·Bikes. (Results on page 26) Motorcycle . Dynamometers • ENABLES ACCURATE DETERMINATION OF TORQUE & HORSEPOWER CURVES • ACCOMPliSH ENGINE FINE TUNING • CONTROLLED ENGINE BREAK-IN • PERFORMANCE TESTING OF ENGINE MODIFICATIONS INCLUDES: HYDRAULIC WATER BRAKE & FRAME - UNIVERSAL MOTORCYCLE SUPPORT STAND - GAUGING -INSTRUMENTATION \ COM~LETE SYSTEM $620 00 • HANSON ENGINEERING CO. P. o. Box 2354, Canoga Park. Cal. 91306 (213) 882-2667 • .aJa wins again! Austin Motosport Park Austin, Texas May 2, 1971 125 Junior John Kinzler and wins... ACA Motocross Sadd leback Park Irvine, Calif. May 9,1971 125 Junior Ch ris Jackson and wins.•: So. Calif. Sidehack Ass'n. Bay Mare Park May9,1971 Red Dots M.C. Hare Scrambles May 9,1971 Trailbike Class 1st - Mitch Mayes - BAJA lOa 2nd - Larry Roessler - BAJA lad 125 Novice, Div. III Rick Reinig Penton lest, Inc. 2150 So. S

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