As 2022 comes to an end, we start to see the release of new and improved 2023 motocross models. KTM began sending their new SX-F and XC-F four strokes to authorized KTM dealers in June, and their SX and XC two-strokes just last month in September. With such a recent release, many riders are still dying to get their hands on a new bike to rip across the dirt. With a wide selection, KTM has many new fans questioning which bike would best suit them, specifically two or four-strokes.
Pictured above are the new 2023 two-stroke (above) and four-stroke models (below). The big give away in distinguishing the two dirt bikes are the pipes exiting the head of the engine. Notice that the two-stroke has a much bigger pipe, while the four-stroke is much slimmer at the front and slowly builds up like a bubble on the side. Looking right behind this pipe, we notice that the engines are different. The two stroke engine is much smaller at the top, as it comes to a nice round end. The four-stroke however builds up to a fatter end in order to fit the four pistons.
The debate between which engine build is better has been ongoing since the first introduction of the four-stroke engine dirt bike. In 1996, Honda built their CR450R containing the new engine, which thus started the transition from two to four-strokes. Each engine has their own pros and cons. Some key differences are that two-strokes are know for their high power to weight ratio and their cheap repair costs, as well as being overall much easier to work on. On the other hand, four-strokes are more powerful despite their heavier weight, as well as much more user friendly since they require less maintenance. However, they are much are hard and thus expensive to fix, mainly due to the limited space inside the bike. Everything is almost cramped up into the frame unlike the two stroke where there is more space between the components.
With this quick and simple breakdown of two and four-stroke engines, I hope to provide new riders with some insight before they rush into getting a new 2023 bike. I want to encourage them into doing their own research, such as looking up how to maintain a two-stroke or how costly it is to repair a four-stroke engine. Additionally, it is important for riders to be familiar with their state regulations over OHV, such as where and when to ride according to riding seasons set to limit pollution. This is a key point to research since one of the many reasons why motocross is moving away from two-stroke engines is due to them being less environmental friendly. Or perhaps new riders might be interested in the new electric bikes which have began gaining popularity. Who knows, they could be the future of the sport, but I'll leave that for you to look into.
As a note, I have only been riding for just under two years, so I am relatively new. This is knowledge that I have gained from talking to many riders and mechanics on and off the track, as well as articles and most intriguing of all, YouTube videos. As I do not have much experience with dirt bikes, I would appreciate anyone offering their input, as well as making any corrections to any mistakes I have made. The same goes to new riders, do your research and return to let me know your findings. Thank you all.
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