These classic motorcycles are noisier, more powerful and lighter than modern four-stroke engines. It is these factors that have made them so popular. Many motorcycle fanatics pay a lot of money for some of the most famous vintage models. The UK followed in 2004 when 2-stroke engines were banned only for use with low-cc scooters. At that time, two-stroke motorcycles were hard to find. Manufacturers had abandoned the format after the US ban. The two-stroke engine had a simple design, which also meant it was relatively cheap to manufacture. This has also benefited the consumer. They were affordable – especially the one- and two-cylinder versions. Who made that decision? I will tell you who; The bureaucrats who didn`t understand the power of two-stroke engines, that`s who. “It`s only 350ccs.
You`d have to work hard to get into trouble! ” they said. But oh, how wrong they were. And so a lot of British kids came out and did just that. It`s a miracle there`s still one in one piece, to be honest. While the two-stroke is cheaper to manufacture and repair than the four-stroke, it is also less durable. The lubrication system is not as effective in two-stroke engines. This means that additional friction is created and parts wear out faster. Of course, the features that led to a two-stroke engine start in the first place – the explosive power strips, the shrill exhausts, the unmistakable aroma of blue smoke – have been given a makeover for 2021 on the Langen. Unfortunately, however, a change in the law from 1983 meant that the Leaners were now limited to 125cc and the Gamma was also quite expensive, but he and his successors certainly ushered in a new era of GP-style 250-stroke road times. The SDR, which was aimed at the Japanese domestic market but, like many exotics of the early 1990s, arrived in the UK as a “grey import”, was powered by a revised 35hp version of the DT200 trail bike`s simple liquid-cooled two-stroke, but in a bespoke ultra-minimalist tubular steel lattice frame with a single saddle and slim tank. For those of us who grew up with them, there are 2 shots in the blood.
In reality, owning one or two 4-strokes for general use and smoking for fun days makes everything work. It is quite common for people to approach me in cafes to talk about the 2 knocks I parked in front of the door. They bring back memories! You can`t have a conversation about both strokes without mentioning the Yamaha RD350 (or the 250cc version). This classic road bike and RD series are a beautiful combination of all the amazing 2-stroke features. It offered a fast, noisy and lightning-fast ride. What`s more, the high fuel consumption also means that the bike`s fuel tank empties faster than its four-stroke cousins. This can be a big problem if you use your motorcycle for long car trips or trips. If ever a two-stroke bike has succeeded in the racing replica, it is certainly the Honda NSR250 of 1994. Almost the spitting image of Luca Cadalora`s 1992 World Championship bike, the thing looked – and still looks like the absolute enterprise. Amazing features include keyless ignition via a smart card anti-theft system called “PGM-IV ignition,” that gorgeous one-sided swingarm, and a Big Tobacco livery that always lifts the hairs off your arms, even though we all know best. They are, of course, at a state-of-the-art 125cc liquid-cooled two-stroke chassis with 30hp and two economical chassis, all dressed in a space-age body.
Another type of motorcycle produced in the two-stroke era was the three-cylinder. The three-cylinder engines represented the pinnacle of 2-stroke technology and were expensive to manufacture. The advantages of three-cylinders included lower fuel consumption and additional throttle power. As we have already explained in this article, two-stroke engines were not without drawbacks. Let`s look at some of the cons: An original DT200 is not the easiest Yamaha 2-stroke to find, especially in good condition, those from the UK are the best to look towards the France/Germany. Modification and adaptation of these simple machines was popular in the past and continues to this day. Finding an original two-stroke engine is almost impossible, many bikers have modified their beloved models to create custom café racers and sports bikes. He had it all. His liquid-cooled screaming single produced a whopping 33hp in a power band on the razor`s edge.
It had an aluminum double spar chassis, RC30 one-sided swingarm, inverted forks, Brembo brakes, greasy tires, and GP-type bodywork. As incredible as the bikes are today, there will never be anything like the noise, smell and speed of the classic Yamaha 2-stroke bikes of yesteryear. If you`re planning to take a two-stroke wheel and make it legal on the road, it`s important that you know its drawbacks. The most important thing is the amount of fuel they consume. Two-stroke engines run twice as fast as four-stroke engines and are more expensive to operate. Road homologation excluded full-caliber mental motocrossers such as Yamaha`s YZ465 or Honda`s iconic CR500. Softer trail bikes, especially those from the 1970s and early 80s like Yamaha`s DT175MX or Suzuki`s TS250ER, were tempting. We even considered the classics of the trial races of the 70s, bikes like the Mick Andrews Replica (MAR) of the OSSA or the legendary Montesa 247 Cota. The history of the two-stroke wheel dates back to 1904.
That year, the manufacturer Scott patented the first 2-stroke motorcycle engine. In 1908, the company began producing water-cooled two-cylinder motorcycles. This was recognized as the first proper use of a 2-stroke engine. Just look at the rich pedigree of race track bikes to understand what they have to offer. Driving a stroker is a thrill like no other. This is something you have to experience to appreciate it yourself. An order to create a “TZ for the road” led to the revolutionary introduction of liquid cooling (hence LC), cantilevered monoshock rear suspension, and darkened styling (instead of the chrome of the 70s). The original version of the RD350 was produced between 1973 and 1975.
With air cooling, a six-speed gearbox, and an intake duct equipped with reed valves, this machine was packed with modern features. Although it was a two-stroke engine, the RD350 was also equipped with oil injection. This meant that users no longer had to mix oil and fuel themselves. The biggest disadvantage of two-stroke engines was the reason why they were eventually banned from sale – high emissions. Since engines burn twice as fast as four-stroke engines, they consume more fuel over a period of time. As emission standards slowly tightened, strokes eventually became one of their victims. Statistically, the Yamaha RD350 competed with the best two-strokes of the day. Its 347cc engine produced 39 horsepower, increasing the top speed of the RD350 to 105 mph.
These numbers meant that Yamaha machines were an instant success in racing. We only had to install a two-stroke off-road motorcycle – but which one? Gilera`s CX125 may have been included here for its radical look and suspension, but the early 1990s were hit with equally deserving 125cc Italian sports strings. Two-stroke motorcycles are among the most iconic and well-known motorcycles of all time. They are pillars of world and British motorcycle history. Knowing the history and key facts about two-stroke motorcycles is therefore essential for any motorcycle fan. The combination of the RG500`s power and ultra-light nature has made it a two-stroke icon. However, be prepared to pay if you want one; the RG500 Gamma is not cheap nowadays! Few expected to utter the words “new” and “two-stroke” in the same breath in 2021, but the arrival of the UK-designed Langen two-stroke engine – which made its public debut at the Goodwood Festival of Speed last weekend – has given us all nostalgic vibes. There were hundreds of motorcycle models produced during the two-stroke golden age. Manufacturers have always tried to improve performance and make the most of the simple design of the 2-stroke engine. This resulted in many interesting bikes. Thanks to faster combustion and faster power output, two-stroke motorcycles have incredible acceleration. Almost everyone who climbs on these road-legal race cars is immediately overwhelmed by how quickly these machines can upgrade.
A two-stroke engine gets its name from the two movements that the piston makes in each cycle. During this cycle, a 2-stroke completes the entire process of suction, air compression and combustion. That`s why 2-strokes can provide so much power (a four-stroke engine takes twice as long to complete each cycle). The YPVS was a way to ensure that your Yamaha 2-stroke motorcycle had the best of both worlds and could get the best performance from your bike in any situation. For example, high performance at high speeds, but also at the entrance of a corner, the bike would have a good medium range and good torque to get out of the curve again. The performance standards for Yamaha 2-stroke motorcycles were truly set by the 1959 YDS-1, which quickly gained a reputation for blowing the popular British Parallel Twins 650cc out of the water. Yes, many two-stroke motorcycles require a mixture of fuel and oil before ignition.