2003 We have done many World Championship events there over the years. 1948 But that was in part because the bigger tracks out westSaddleback, Livermore, Puyallupwere part of the still mighty Trans-AMA. Roger De Coster won his third consecutive 500cc world championship for Suzuki ahead of West German rider, Willy Bauer. As a result, Suzuki resorted to adding ballast to the bikes. Hakan Andersson won the 1973 World Championship on a bike that he refused to race in the first two GPs of 1973 because he was afraid the Monoshock would break. I had been second in the 250 World Championship twice, and my contract with Husqvarna was up. He also finished well in the fall Trans-AMA series. Jim, his younger brother Ron, sister Debbie and mother were all involved in motorcycling. Contents 1 Summary 1.1 500cc championship 1.2 250cc championship 2 Grands Prix 2.1 500cc 2.2 250cc 3 Final standings 3.1 500cc[1][5][12] 3.2 250cc[13][14] 4 References 5 External links Summary [ edit] 500cc championship [ edit] And, it is dangerousvery dangerousbut the racers are fantastic riders. He competed in the Motocross World Championships from 1975 to 1984. Its simple, efficient, and apparently foolproof. It is interesting to note that Montesa used only one rider during the series (Kalevi Vehkonen), a rider who had never before ridden a Montesa. Johnny O'Mara won his first AMA National in 1981, then also joined Team USA with his Honda teammates. 1980 This website uses cookies to improve your experience while you navigate through the website. DID YOU HAVE ANY MAJOR WINS ON THE MONTESA? 1981 Perhaps the rubber covers over the fork sliders keep much of the harmful grit from damaging the seals. Motocross Racing World Championship season. * The first American to lead the World MX Championship (Spain 1973) The fork legs themselves, though, tend to be somewhat vulnerable to damage from flying rocks. At first, many fellow GP riders believed Pomeroys victory was a fluke, but the 20-year-old American quickly won over the skeptics with strong finishes all season, including a second overall at the Italian GP. Then I almost won all the other motos that season on the Monoshock. In 1964, he was named the recipient of the Belgian National Sports Merit Award. I had been Grand Prix racing since 1968. It had been Pomeroys plan for many years to retire from racing before it had put too much strain on his body. I had a good career, good friends and good family, and being with Yamaha was a very exciting time. You also have the option to opt-out of these cookies. He finished the year on a high note by becoming the first non-World Champion to win the Trophies des Nations. Kawasakis Jammin Jimmy Weinert would win the muddy Rio Bravo MX Park round outside Houston, Texas, marking the first time in 500cc Trans-AMA racing an American had ever won. His year included a victory at Belgium and a number of second and third place finishes. WAS TORSTEN HALLMAN STILL RACING WHEN YOU STARTED? By age 13, Pomeroy had amassed a large collection of trophies. The Trans-AMA Series would end with Adolf Weil, the German veteran, taking the biggest championship of his esteemed career, but it was Pierre Karsmakers who would win the grueling 23-race 1973 AMA 500 National Motocross Championship. Clearly Jim Pomeroy was capable of winning against the best riders in the world. 1975 Silodrome was founded in 2010 as a website dedicated to Gasoline Culture and all it entails - We write about modern cars, classic cars, motorcycles, racing, gear, gadgets, clothing, boats, planes, airships and the occasional submarine.Read more Silodrome 2023. all rights reserved. 2020 When you are the World Champion, everybody goes after you and tries to follow your lines. This exposes the filter and also the rubber strap holding the rear of the tank in place. Although the company did achieve some signifiant results on the asphalt with its technically sophisticated engines, the place where it really dominated was on the dirt. Hakan Andersson won the 1973 World Championship on a bike that he refused to race in the first two GPs of 1973 because he was afraid the Monoshock would break. 1959 April, 8th, 1973, at the Valles Mx track, located in Sabadell Terrassa, near Barcelona. It was fantastic! SuperMotocross World Championship Playoffs and Final Revised Schedule: SuperMotocross Playoff 1 - zMAX Dragway - September 9, 2023. Of the 684 supercross main events run from 1974 - the year the AMA Supercross Championship officially started - through March 7, 2020, only 64 riders have won. Its not everyday you get the chance to buy an unridden CZ Coffin Tank 400cc motocross racer, particularly not one still sitting in its factory crate draped in waxed paper showing its age like a true time-capsule. 1961 1998 In 1975, Pomeroy had a strong year in the World Championships, finishing seventh overall. SuperMotocross World Championship; Motocross . Montesas new fuel petcock design is a simple device which made us wonder why no one has thought of it before. Necessary cookies are absolutely essential for the website to function properly. He competed in the Motocross World Championships from 1980 to 1990, winning five world championships in eleven years. But not Pomeroy. While Lackey was splitting his time and focus, Pierre Karsmakers was firmly committed to his move to America. The Spanish GP in 1973 will always be known as the first GP victory by an American rider. The 1973 FIM Motocross World Championship was the 17th F.I.M. 1978 He also competed in U.S. races that did not conflict with the World Championship schedule including the newly formed AMA Supercross (then called the Yamaha Super Series) and Trans-AMA series in North America. These cookies will be stored in your browser only with your consent. Check out all the exclusive content this month, Recapping the Second Year of AMA Pro Motocross in America: 1973, yesterdays introduction, which you can dive into if you missed. For myself, Yamaha was a very nice factory ride. Graham Noyce is an English former professional motocross racer. 1984 Powered by Gasoline and Caffeine. 1947, Copyright Info Mdia Conseil 2007-2022 - All rights reserved, France (romain Febvre, Gautier Paulin, C 20, Netherlands (coldenhoff Glenn, Jeffrey, Herlings Vlaanderen, Info Mdia Conseil : 419 Rue Lemelin, St-Franois QC G0A3S0, Canada. He again battled equipment failures and finished third in the last round and was fourth overall and top American for the series. 2023 - Motocross Action Magazine. It was completely different. Now there are thin, flexible plastic fenders (manufactured by A&A in California and >. The outdoor nationals went much better for him and he finished the 250cc nationals ranked fifth. Yamaha already had the #1 plate there with Gary Jones, but then during the off-season a new entity entered the arena: Team Honda. He died August 6, 2006, in a Jeep crash in Washington. Lackey brought Jim Weinert over to watch. Clutch pull is on the heavy side, but once underway, the rider can ignore the clutch during shifts if he so prefers. There is room enough for the carburetor to be swiveled around so the bottom float chamber can pop off. I ultimately finished sixth in the championship. As before, the crankshaft rides in three ball bearing main bearings and is a pressed together affair consisting of two pieces. 1967 My handlebar broke, and I crashed in the woods section. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. And. He would crest the top of the hill, land partway down slope, shift up two gears and pin the throttle wide open. I am sure that it was the biggest thing ever in motocross history up to that time. Bob Hannah kept rolling right into 1979 on his Yamahas, winning another AMA Supercross title as well as another AMA Motocross title. For me, it started back in 1957. John Banks is a British former professional motocross racer. The name CZ, or more correctly Z, stands for esk Zbrojovka a Czechoslovakian company that was originally founded as a firearms manufacturer before branching out into bicycles in the years after World War I and from there into motorized bicycles, followed logically by motorcycles and scooters. Pomeroy finished the AMA 250 Motocross championships ranked 10th, despite only competing in five rounds of the 15-race series. Total port area is huge compared to last years version. [2] Bauer then took control of the championship by winning 5 out of the next 6 motos. The Vehkonen Replica: A Proven Performer For The Motocross War. He competed in the Motocross World Championships from 1979 to 1992. [2] De Coster then took one of their tanks and drove two and a half hours to have the tank modified to increase its volume. It was the only time that I was blood tested. We were impressed with the amazing throttle response of the new Bing carburetor. Monster Energy Star Yamaha Racings Jeremy Martin got his Lucas Oil Pro Motocross 250MX Championship campaign off to a, 450 / 250 Press Conference 2023 Anaheim 1 SX, 250 and 450 Main Events 2023 Anaheim 1 SX, Chad Reed Injury Update from Cardiff, Wales British GP, Results: 2022 FIM SX World Championship Rd 1 British GP, Monster Energy Star Yamaha Racing Starts 250 Pro Motocross Season with Double Podium, Ferrandis Scores Maiden 450 Pro Motocross Victory at Season Opener, GEICO Continues as Official Insurance Provider of MX Nationals, BARCIA GETS BACK IN THE MIX WITH A FOURTH-PLACE FINISH IN ATLANTA. 1982 Gone is the bulbous upswept pipe, the alloy fenders, and large hubs; even the cases are new. History [ edit] It was the two-stroke engines developed by CZ engineers that would power them to countless race and championship wins. Here, Hakan is chased by Tim Hart (2) and Adolf Weil (8). But the biggest upset win came from Jim Pomeroy at the opening round of the 1973 FIM World Championships in Sabadell, Spain. 1973 Alabama International Speedway 500MX AMA Pro Motocross Championship Results. Heres some vintage home-movie footage from the 73 Daytona Motocross shot by Wally Wallenberg: A round would also be held on the infields of Pocono International Speedway in New York, and again at Alabama International Raceway in Talladega. Okay, now lets get to the racing. I am 77 now, and I have done my time. [6] The new suspension design would go on to revolutionize the sport. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Now he would be Kawasakis first entry on the 500cc Grand Prix tour. 1996 SuperMotocross Playoff 2 - Chicagoland Speedway . And there sits your main jet, a snap to switch. Sweden ( Uno Palm, Christer Hammargren, Hkan Andersson, ke Jonsson) 3. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Expect to do some touch-up work to keep them looking spiffy. No people were there, and it was in the woods. 2004 I could not see anything. He competed in the AMA 250cc National Motocross Series, AMA Supercross and Trans-AMA series in 1977 and 78. But when the oil crisis came, they decided to stop all racing after 1975. You can clearly see Gary Jones sporting the #1 plate on the AMA pro debut of the 250cc Elsinore. I was fifth overall in 1977 in the 500 class on the Montesa. The previous left side cover was fairly large in order to make room for the Cota models extra flywheel. Number four in the final standings made Montesa the highest placing European factory in the championship, a little tidbit of information that may raise a few eyebrows. [5] As the season got underway, Yamaha's new "monoshock" rear suspension began to make an impact with Christer Hammargren winning a moto and Jaak van Velthoven taking the overall win at the Finnish Grand Prix. The 1972 FIM Motocross World Championship was the 16th F.I.M. Montesa used this outer case on its Cappra MXers as well. CZ motorcycles still enjoy a cult following around the world, in general terms theyre not as famous as the bikes made by Husqvarna or the Japanese manufacturers during the same era, but theyre arguably more successful. I was out of racing for almost two years. He would also compete in the full Trans-AMA Series, which allowed him to finish fifth overall in the 73 AMA 500 Nationals. That changed the whole sport. There were 30,000 spectators in the grandstands. The other riders would come over the top cautiously and then be careful not to pick up too much speed before the tight corner at the bottom. 1979 proved to be a very difficult year. Enter the Vehkonen Replica, Montesas best effort to date in a motocross mount. It would be good for the sport. WHAT PROMPTED YOU TO RETIRE? Vimond is notable for being the first French competitor to win an FIM motocross world championship. The year started with an overall victory at an AMA 250MX event at Saddleback Park in Irvine, California. Points are awarded to the top 10 classified finishers. Heikki Antero Mikkola is a Finnish former professional motocross racer and motocross team manager. MXA RETRO TEST: WE RIDE RICKY CARMICHAELS 1998 SPLITFIRE KX125, TESTING THE NOW FORGOTTEN 2010 HUSABERG FX450 & ITS UPSIDE-DOWN ENGINE, MXA RACE TEST: THE REAL TEST OF THE 2023 HONDA CRF250, MXA TECH SPEC: 10 THINGS YOU NEED TO KNOW ABOUT THE 2023 SUZUKI RM-Z250, MXA RACE TEST: THE REAL TEST OF THE 2023 YAMAHA YZ450F, MXA RACE TEST: THE REAL TEST OF THE 2023 KAWASAKI KX450, MXA RACE TEST: THE REAL TEST OF THE 2023 KTM 350SXF, MXA RETRO TEST: WE RIDE THE 2000 KTM 520SX PRE-PRO VERSION, MXAS 2023 250 FOUR-STROKE SHOOTOUT VIDEO, MXAS INSIDE THE PROS BIKES: R.J. HAMPSHIRES ROCKSTAR HUSQVARNA FC250. The petcock is a hollow rubber capsule with a steel ball inside. Applying a black finish to the clutch and magneto covers is a nice touch, but after a few rides the paint gets rubbed away by the riders boots. Chrome moly tubing is used in the swinging arm and at all stress points of the frame. [1] Pierre Karsmakers from the Netherlands dominated the 1973 500cc national championship, winning seven of 12 AMA Nationals and claimed 17 victories in 36 races overall. [2] Suzuki had already developed and built their race bikes so, there was no time to build new bikes. Featured FIM Motocross World Championship Results and News On the one hand motorcycles are built to be ridden, but on the other hand its so unusual to see a bike like this still in its crate it may be worth preserving just like this in a museum. I had a three-year contract for 1972 through 1975. 1987 [2][3], Going into the final race of the season at Sint Anthonis, Holland, Bauer was still holding the points lead but, the Suzukis were showing improvement. FIM Motocross World Championship; Monster Energy Cup; Motocross of Nations; [8] Competitors from nine different manufacturers placed in the top ten of the 250cc championship final standings, reflecting the thriving vitality of the sport of motocross. It weighed in at 234 lbs, just 7 lbs more than the CZ 350 MX, and it produced 47 hp a solid figure for the day. We had our own World Motocross track in my hometown of Uddevalla. However, winning didnt come easily during the early part of his racing career. [2] A Suzuki engineer calculated that their bike's gas tanks did not have sufficient capacity to finish the race. He had finished second on a Husqvarna behind Joel Robert in 1971 and 1972. [1] Kawasaki joined the world championships with Brad Lackey in the 500cc class and Torleif Hansen in the 250cc class. Some motocross mounts offer a rider the most serious of challenges when it comes time for the starting routine. [2] [3] To make matters worse, Maico and Yamaha had developed new rear suspensions with longer travel which helped transfer power to the rear wheel over rough terrain. * The first American to lead the Trans-AMA Championship (1975) Then I quit. Starting with his first bike, a Yamaguchi 55, and progressing through a Yamaha 80, 100 and then DT1 250, young Jim raced flat track, hillclimbs, motocross and hare scrambles events. . 2007 Akront aluminum alloy rims are employed for their weight saving benefits, but this advantage is partially overshadowed by the fact that the rims design allows mud and debris to collect in the lip portion near the spokes. The 1973 Superbowl of Motocross in Cycle News. Of course, with all that portion there has to be an adequate amount of fuel supplied to the engine. * The first rider to win a World MX GP on a Spanish MX bike (Bultaco) As for the 250 AMA title, that had ended back in early September with the last stand-alone 250/500 AMA National outside New Orleans, and Gary Jones was again the champion, but this time he was on a Honda. DID YOU RETURN LATER IN THE SERIES? As far as the 500cc Trans-AMA Series goes, it was still 11-rounds strong, which meant that the '73 AMA National Championships for 500s would. The rod big end contains a caged roller/needle bearing, while the small end uses a loose needle arrangement. All Rights Reserved. Suzuki's defense of the 500cc world championship was dealt a setback when, the FIM announced a new motorcycle minimum weight limit of 209 pounds just before the start of the season. Eventually, I became a factory rider for Husqvarna together with Hallman, Ake Jonsson, Bengt Aberg and Arne Kring. The second year of the AMA Motocross Championships was a big step forward from the genesis of the tour. But his result in the World Championship helped Pomeroy win the Motorcyclist magazine Man of the Year award for 1976. Lackey was Kawasakis top American rider (and also the top American, period). [2] A Suzuki engineer calculated that their bike's gas tanks did not have sufficient capacity to finish the race. The Southeast was also anchored by Bill West's popular Winter-Am tour, which was arguably bigger than the actual national tour until the late-seventies. 1986 The U.S. market was still taking shape, and the AMA Motocross tour was growing rapidly, especially in one area of the country. Pomeroy grew up immersed in motorcycling and racing. I was very skeptical, because it was a completely new system. In the Trans-AMA series Pomeroy recorded a number of very strong third and fourth overalls at the start of the series. Pomeroy returned to the United States in the summer of 1973 to compete in several Inter-AMA series. [2] Unfortunately, these alterations threw the bikes out of balance and caused them to lose traction. 2000 The series runs 18 events with two races per class at each round. The 1972 World Motocross Championship series was the first ever contested by the Spanish factory, and it came away from the 12-event grind with an impressive 4th overall finish. We'll assume you're ok with this, but you can opt-out if you wish. Of those 64 riders, 22 won a single main event in their careers (this figure includes the still-active Blake Baggett and Justin Brayton) Jim Pomeroy is responsible for a number of firsts in motocross during the 1970s. There is no item in routine maintenance that isnt just thatroutine. Husqvarna believed in me because I had such a good 1968until I broke my leg. When Yamaha pulled out of racing at the end of the 1975 season, Hakan spent two years at Montesa before returning to Husqvarna. It was stiff, but I thought it could be something good for the future. All the other factories had already signed their riders for 1976. 1990 At one time Montesa mounted its swinging arm in rubber, but the VR uses proper bronze bushings with a provision for external lubrication. At the 1977 Motocross Des Nations in Cognac, France, I won the first moto and finished third in the second moto. [1][4] He did so successfully to win his second consecutive 250cc national title. MONTESAS MAIN emphasis the last few years has been centered around trials machines, and its success in this field is well-known. I was on Husqvarna until 1972. DID YOU STAY INVOLVED IN MOTOCROSS? 2008 In 1977, Pomeroy started the year strong with a number of runner-up finishes in AMA Supercross and finished the series second overall. Number four. 1973 AMA Pro Motocross Championship . On a club level, yes. shipped to Spain) and a host of other items we wouldnt normally expect from Montesa. Like Pomeroys earlier 250 GP win, Jones win in the previous years Boise, Idaho Inter-Am, and even Gary Baileys 1969 win in the Firecracker International at Saddleback Park against the visiting Europeans, Weinerts win was another major milestone in the Americans quest to catch up with the European masters. 2006 He competed in the AMA Motocross Championships from 1972 to 1973 and in the Motocross World Championships from 1973 to 1976, before returning to compete in the AMA Motocross Championships from 1977 to 1978. After winning the 1972 250cc national championship on a Yamaha, Gary Jones was hired by Honda to help develop their new Honda CR250M motocross bike for the 1973 season. Not so the Cappra. DID YOU RACE AGAINST BENGT ABERG? Bottom end power of the new Replica is strong, but the 246cc powerplant really comes on in the mid-range and top end. Hakan was on the winning Swedish team with Bengt Aberg, Arne Kring and Ake Jonsson at the 1974 Motocross des Nations. About the only thing youll recognize from earlier models is the plastic fuel tank, now finished in red instead of silver. Front forks are new and damping characteristics are excellent. Championnats du monde de motocross 1973 HollandeFilm en 8mm par Jean Voidet If a big rock flies your way, you could incur some damage unless you thought to install some protective plastic guards. In 1974, 75 and 76, Pomeroy continued to compete in the World Championships in Europe. Itwould remain one of hisfavorite go to bikesfor off-road riding,, This is a Hildebrand & Wolfmller Motorcycle from 1894, a bike that carries the distinction of being the first production motorcycle in history. 1973 FIM Motocross World Championship ** 1973 Motocross World Championship ** 1973 Motocross World Championship ** Previous: 1972: The 1973 FIM Motocross World Championship was the 17th F.I.M. Perhaps it had something to do with all the former firearms engineers now designing engines but for some reason the motorcycles built by CZ took off like a shot, enjoying significant popularity in Czechoslovakia and across Europe, at one time after World War II it was the second biggest motorcycle manufacturer on the Continent. (The first 250cc round was still won by a Sweden-made Husqvarna, ridden by Bob Grossi.). Yes, the Monoshock system started the whole suspension revolution because everybody eventually went to a single shock. The sport of motocross experienced explosive growth in 1973 and motorcycle manufacturers sought to capitalize on the expanding market with all four Japanese manufacturers fielding factory-backed teams alongside their European counterparts. Infront Moto Racing is the company that manages the exclusive television, marketing and promotional world wide rights of the FIM Motocross World Championship, the FIM Motocross of Nations, the FIM Women's Motocross World Championship, the FIM Veteran's Motocross World Cup, the FIM Junior Motocross World Championship, the FIM Snowcross World Graham Noyce would be Great Britain's next world champion when he won the 1979 500cc world championship and two years later Neil Hudson joined him with the 1981 250cc world championship. DID SUCCESS COME QUICKLY FOR YOU? His record of first includes: * The first American to win an FIM World Championship MX Event (Spain 1973) Mike Bell, runner-up in AMA Supercross, would . Points are awarded to the top 10 classified finishers. My leg was so bad that I had to stay in the hospital in Holland for six weeks before they moved me back to Sweden. "1973 500cc motocross world championship final standings", "1973 500cc motocross world championship", "Jim Pomeroy at the Motorcycle Hall of Fame", "1973 500cc motocross world championship race results", "1973 250cc motocross world championship race results", "1973 250cc motocross world championship final standings", https://en.wikipedia.org/w/index.php?title=1973_FIM_Motocross_World_Championship&oldid=1134032698, This page was last edited on 16 January 2023, at 18:01. Pomeroy fought equipment and team troubles and finished outside the top 15 or 20 at some races. Privacy Policy - Terms of Service - Contact Us, The Brockhouse Corgi: A Folding Motorcycle Based On A Design For WWII Commandos, MV Agusta Superveloce Ago: Proceeds Go To UNICEF Ukraine Emergency Fund, Steve McQueens 1971 Husqvarna 400 Cross Is For Sale, The Worlds First Production Motorcycle: The 1894 Hildebrand & Wolfmller, The Distinguished Gentlemans Ride: A Decade of Dapper, The Ducati 750SS The Bike That Saved Ducati, Railroad Spike Knives by Canadian Bladesmith Graeson Fehr $66.83 USD Each. WHAT HAPPENED TO SWEDISH GP RIDERS? It was hugely successful. SWEDEN HAD MANY GREAT RACERS. We and our partners use cookies to Store and/or access information on a device. In 1977 Pomeroy switched from his traditional Bultaco brand bike to join Hondas factory race team. I started to be curious about it because my father brought me to the races. His father, Don Pomeroy, was a very successful racer in the late 1950s and 60s. Yes, only in one moto in Yugoslavia, but that was the frame not the Monoshock. I practiced with riders in my club for many years. 1949 1958 I was second in the 1972 250 World Motocross Championship, but I was good beginning in 1968. WERE YOU SKEPTICAL WHEN THEY ASKED YOU TO RACE THE MONOSHOCK? He competed in the Motocross World Championships from 1967 to 1979, most prominently as a member of the Husqvarna factory racing team where he became the first competitor to win both the 250cc and 500cc world championships. [2] De Coster then took one of their tanks and drove two and a half hours to have the tank modified to increase its volume. Factory Yamaha wanted to use it in the first Grand Prix of 1973. Smith's first major victory came aboard a Swedish-made Monark at the Hangtown Motocross Classic near Sacramento in 1973, one year before the wildly popular West Coast race became an AMA National. You have family, but you are never home. If youd like to read more about this motorcycle or register to bid you can click here to visit the listing on Mecum. Roger De Coster won his third consecutive 500cc world championship for Suzuki ahead of West German rider, Willy Bauer. WHAT WAS IT LIKE RIDING FOR A JAPANESE BRAND? The Wide World of Motocross - 1973 Rich Korb 254 subscribers Subscribe 247 Share 36K views 6 years ago Back in high school (1973) I had watched Bruce Brown's movie - On Any Sunday. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 1952 CZs motocross dominance peaked in the mid-to-late 1960s with the companys six back to back Grand Prix world championship wins. 1979 He was also selected by Motorcyclist magazine as a MX All Star for 1973. 1971 Based on his results on the young AMA tour, Pomeroy had accepted a ride to race in the 250cc Grand Prix Series in Europe, which at the time was much more prestigious than the infant AMA tour. Campionat del Mn de motocrs 1973; 1973 FIM Motocross World Championship; Motocross-Weltmeisterschaft 1973; Wereldkampioenschap motorcross 1973; Motocross Championship; sportseizoen van een motorcrosscompetitie, Jim Pomeroy amb Oriol Puig Bult (dreta) just desprs que lameric guanys la primera mnega del GP dEspanya de 250cc de 1973 (8 d'abril al Circuit del Valls), Motocross World Championship in the 1970s, https://commons.wikimedia.org/w/index.php?title=Category:1973_Motocross_World_Championship&oldid=730850060, Creative Commons Attribution-ShareAlike License.
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