Service The manufacturer of the CR500AF and other two-stroke dirt bikes, Honda, is the owner of the trademark “AF500.”
Sadly, due to the restricted supply of two-stroke engines and other components needed to build the bikes, these models are no longer being made. In a similar vein, the majority of the components used in these bikes, such as the cylinders, casings, and frames, are also unavailable.
We value the devotion of the Two Stroke riders, and we will make every effort to bring you the parts you require. Simply use the chat or contact us page to send us a message, and we’ll see what we can do.
In This Article...
Why did Honda discontinue the CR500?
The CR500 was only produced until 2001, after which Honda stopped making them. This was brought on by the 1993 discontinuation of the AMA 500 motocross competitions. Honda stopped paying as much attention to the CR500 because there was no longer a specific motocross race for the bike to participate in.
What year has the most HP in a CR500?
The Honda CR500 features a number of flaws, including frightening headshakes, lasting vibrations, and a jittery chassis. Throughout the dirt bike’s 17-year lifespan, Honda developed a number of improvements to eliminate these issues. The following are the modifications that stand out the most:
- In order to complement the new-style wing decal on the tank shroud, the number plate panels were upgraded from yellow to solid white and the bodypaint from Benetton-like colors to a fresh palette of blood red.
- Honda began using Kayaba suspension parts as of 1995 in response to customer complaints about Showa forks and shocks.
- With the introduction of disc brakes in 1987 and later models, the wheel rims were also changed from silver to gold anodized.
- For the second time, the tank shroud decal/graphics were redone with a red backdrop and fluorescent yellow hues that were outlined in purple.
- Honda updated the CR500R in 1997 by fitting its engine into the Gen-II aluminum chassis of the CR250R.
- In 1989, the manufacturer redesigned the dirt bike’s cylinder head to smooth out the powerband and compression requirements. Within the same year, the bike’s front suspension and exhaust were upgraded.
- A 2005 CR500AF model with a 4-stroke chassis modeled around the CR250R Gen-III framework is reportedly in the works, according to a few web sources.
- In 1985, a motor with liquid cooling and a flat-slide carburetor were introduced.
- Competition CR500s were modified by professional racing outfitters to include a 4-speed gearbox, boosting their tractability and enabling professional MX racers to start a race in 3rd gear while lowering the necessity for up-shifting (to get ahead of the pack) when in a tournament.
Why did Honda discontinue producing two-stroke engines?
Takeo Fukui, President of Honda, made the announcement that the Japanese automaker would phase out two-stroke engines back in 2003. Honda immediately started gradually getting rid of two-stroke motorcycles, scooters, and mopeds. The CR 250, 125, and 85 motocross bikes were the last of its line to be produced. Goodbyes with a kiss. Honda made their threat come true today. There won’t be any more two strokes as of 2008, according to the official statement. This indicates that you won’t need to premix oil in your Honda’s petrol tank after 2007.
Honda is taking a risk with this decision since they are the first of the top five motorcycle manufacturers to make it—a move that most experts in the business agree will soon become unavoidable. Dedicated two-stroke racers will undoubtedly take revenue away from Honda, but only temporarily. Honda’s choice to give up port timing in favor of valves and cams signals the end of the end for pre-mix and expansion chambers, much as the Yamaha 400-F signaled the beginning of the end for those technologies.
What effects will this have on motocross racers? Anyone riding a four-stroke in the 85cc class will feel like they are humming along on a weed mower. Honda is optimistic that the AMA will understand their struggle and permit throaty, 150cc four strokes to crush micro class racers, nevertheless. There might also be a significant reduction in talk in the pits. Once the decibel level exceeds the four-stroke tipping point, it is unlikely that anyone will be able to talk, order a hot dog, or debate with the starting officials. Mini dads will no longer be heard by us or their muffled children as a result of change. By the summer of 2008, be ready for significant sound inspections.
What 2-stroke Honda model did Honda make last?
The CR 500cc 2-Stroke dirt bike was discontinued by Honda in 2001, and the CR 85, 125, and 250cc 2-Stroke dirt bikes were discontinued by Honda in 2008. If you have ever driven a 2-stroke motorcycle, you will understand that it offers a very different, if not superior, riding experience than a 4-stroke engine.
What dirt bike is the fastest?
The Quickest Dirt Bikes Available
- Yamaha WR250F in 2022. Maximum Speed: 85 mph.
- 202 FX Zero. 85 mph is the top speed.
- Honda CFR450RL in 2022. 87 mph is the top speed.
- Kawasaki KX450X in 2022. 89 mph is the top speed.
- Kawasaki KLR 650 in 2022. 95 mph is the top speed.
- Husqvarna FE501S in 2022. 100 mph is the top speed.
- Beta 500 RR-S in 2022.
- KTM 450 SX-F in 2022.
Honda still produces 2 strokes?
Three of the other main six manufacturers—Yamaha, KTM, Husqvarna, and Suzuki—continue to make two-stroke motocross bikes despite the fact that Honda, Kawasaki, and Suzuki no longer do so. KTM manufactures the 250 SX and 125 SX in addition to the 150 SX, a bike that sits between the two. With its TC 250 and TC 125 models, Husqvarna remains with the conventional 250 and 125 options. The same is true for Yamaha; if you’re looking for a MY20 two-stroke MXer built in Japan, your choices are the YZ250 and YZ125. With its MX 300, MX 250, MX 144, and MX 125 models, TM offers the most displacements in the full-size two-stroke motocross bike sector, while being the smallest manufacturer among those mentioned below in terms of size and production.
Will Honda reintroduce the CR?
Return of the CR 2-strokes! Ever since the official HONDA announcement, the internet has been ablaze. A leaked Honda release reveals that the CR500 would be making a comeback with fuel-injected variants, which was perhaps the most dependable and powerful 2 stroke motocross bike of its time.
What makes CR500 superior to KX500?
At 238,2 pounds, the Honda CR500 weighed 10 pounds less than the KX500. The power curves of the two bikes on the dyno were radically different. The KX500 power curve was broad and linear compared to the CR500’s sharp, strong power curve (revving almost 2000 rpm further at peak). With 58.78 peak horsepower, the KX500 outperformed the CR500 by 4 horsepower; it simply took longer to get there. The CR500 provided 47.53 pound-feet of torque compared to the KX500’s 45.18 pound-feet in the category of torque.
When comparing two-stroke and four-stroke engines, the 2022 Honda CRF450 has 37.13 pound-feet of torque, which is 28 percent less than the 1994 Honda CR500. This is the most torque for a 450 four-stroke. The KX500 has 58.78 horsepower, which beats the YZ450F’s 58.56 horsepower in the race for maximum four-stroke power. In the end, the peak horsepower of the greatest four-stroke production and a retired KX500 were equal, but the torque of the vintage Honda CR500 had a 28 percent boost in pure grunt. Oh my my, that is a lot.
The 500s felt very different on the track than what the dyno predicted they would feel like. The powerband on the Honda CR500 was wide, whereas the KX500 revved quickly and required shifting frequently. To put it mildly, I was perplexed. Do Jamie’s dyno charts match up? No. On the track, they simply had a different sense.
Which is faster, a 2- or 4-stroke engine?
The primary distinction between a 4-stroke engine and a 2-stroke engine is the number of stages or complete revolutions required to complete one power stroke. A 4-stroke engine requires four stages or two complete revolutions, whereas a 2-stroke engine only requires two stages or one complete revolution. This implies that a 2-stroke engine may have a power output that is twice as great as a 4-stroke engine while simultaneously being lighter.
Stroke Engine
Environmentally friendly and fuel-efficient, four-stroke engines. They function in four stages:
- A downward stroke of fuel is sucked in while the intake valve is open.
- Compression: The fuel is compressed when the piston rises.
- Fuel is ignited after it has been compressed to provide the engine’s power.
- Exhaust: The exhaust valve opens, allowing the cylinder’s exhaust gases to leave.
Stroke Engine
In a two-stroke engine, the power and exhaust steps are combined with the compression and ignition steps on the upstroke. Although there are fewer moving components needed for this procedure, less torque is produced.
The two-step method entails:
- In the upstroke (ignition/compression), the piston rises and the crankcase is entered by fuel and air. Compressed air and gasoline are combined, then ignited.
- After the fuel ignites, the piston is depressed during the downstroke (power/exhaust), causing the exhaust to be released.
The optimal engine type for you will depend on the requirements of your application. Both engine types offer advantages and disadvantages. While 2-stroke engines are lighter and faster than 4-stroke engines, 4-stroke engines function better and often live longer than 2-stroke engines.
Do two-strokes make a comeback?
We are unable to respond to that, but 2-stroke engines are unquestionably making a comeback. They are currently found in all riding and racing disciplines, including as Enduro, NHHA, Motocross (amateur, professional, and hobby levels), local enthusiasts, and Amateur MX.
Why is a two stroke so quick?
There is a small amount of oil put into the fuel for 2-stroke engines. It is known as a “2-stroke because the whole cycle of intake, compression, combustion, and exhaust is performed by just one upward and downward movement of the piston. Instead of using intake or exhaust valves, scavenging ports, which are tiny holes in the cylinder wall, are utilized to suck in air and release exhaust. A 2-stroke engine produces more power than a 4-stroke engine and delivers that power more instantly since combustion occurs with each crankshaft turn. These are some of the factors that contribute to the lengthy history of 2-stroke engines being used in a wide range of motorcycle types. Since 4-stroke engines naturally have higher fuel efficiency and less exhaust smoke, however, demand for more environmentally friendly performance has increased. Yamaha only produces 2-stroke motorcycles for closed-course competition and a few models for export as of 2019. Despite this, Yamaha 2-stroke products are still widely used because of their outstanding reliability, simplicity, lightweight design, and relatively low maintenance requirements. Today, Yamaha 2-stroke snowmobiles are utilized to travel through Russia’s bitterly cold climate, while our 2-stroke outboard engines are frequently used for fishing in Africa. And a lot of motorcycle aficionados still adore 2-stroke engines for their powerful, astounding acceleration. For 4-stroke engines, there is no oil added to the fuel, and the piston moves up and down twice during each combustion cycle, therefore the name “4-stroke. However, 4-stroke engines need highly precise intake and exhaust valves, which makes this engine style more complex, heavier, and has additional drawbacks. However, they give consistent power, have good fuel economy, produce lower emissions, and more. Because of this, 4-stroke engines are found in practically all two-wheel vehicles, from large motorbikes to small scooters.