2006 YZ125; Yamaha set the standard for 125 2-strokes in ’06. The YZ125 is the best choice out of the 125’s because it has the broadest power curve. With better low-end and midrange torque, it’s easier to ride as a beginner because it will still accelerate if you don’t have the throttle wide open and the RPM up high. 250 vs 450 Dirt Bike Size Difference. When it comes to dirt bikes, size does matter. A 250cc bike is going to be smaller and lighter than a 450cc bike. This can make a big difference when you’re out on the trails or racing. The main difference between a 250 and 450 dirt bike is the engine size. A 250cc engine is much smaller than a 450cc engine. Whether you’re looking at the weight, the horsepower, top speed, or the price, these are the average specifications of a new 450 dirt bike: Horsepower. 53-58HP. Top Speed. 75mph. Weight. 234lbs-248lbs (wet & ready to ride) Seat Height. 37.4″ – 38.0″. In no particular order, let’s get on to the best five dirt bikes that I have researched to be the best selection for beginner dirt bike riders. Honda CRF250X – Beginner Dirt Bike. Honda CRF230F Beginner Dirt Bike. Yamaha YZ125 – Best Beginner Dirt Bike. Yamaha TTR-50 – Kids Beginner Dirt Bike. Order your Parts from Rocky Mountain ATV/MC using this link to support DBC - Not everyone needs an enduro championship winning bike, the little KLX is rather obviously not that. What you get is exactly the right amount of capability for a trail bike. It is arguably the best dirt oriented entry level dual sport, and will make for a great beginner bike too. First, don’t misunderstand and think because the 250 is greater in size than 125 that the 250 4-stroke is more powerful than the 125 2-stroke. In fact, 2-stroke bikes with the same engine displacement typically have significantly more power than their 4-stroke counterpart. Dirt Bike Riding Style. DIY Maintenance. Yes, dirt bikes can be safe for kids, as long as you choose the right bike for their age and height. If your 11-year-old is trying dirt biking for the first time, you can even add training wheels on their bike for added support. At their age, I’m sure they will outgrow the extra wheels in no time, but it can be a good place to start. A 250 4-stroke dirt bike can be suitable for some beginner riders, while it may not be ideal for others. The engine displacement and power of a 250cc 4-stroke can offer a good balance between manageable performance and ample power for learning and progressing riding skills. 35 to 39. 250. 6’. 182. 37.5. 450. Adults and children over 12 can jump onto six-speed dirt bikes immediately. Nevertheless, big powerful bikes might be too challenging for total beginners, so we suggest starting small and climbing slowly up. T3SgQ1.