The 520 was able to pull an extra gear on the same hill against The first time out on the snow and I knew that I had made a good decision. A few days later I found myself in the garage with a torque wrench and a new CP forged piston to Route=common/home) makes a 520cc big bore kit for the KTM 450 SX-F that was attached to my Timbersled SX 173. It is still pretty amazing how quick and agile you can get around the mountains with such little horsepower.Īfter a little more research and homework on the Internet, I found that Thumper Racing ( If I'm riding a KTM 450 SX-F that makes 62 horsepower at sea level, it is going to make only 39 The power loss at elevation really takes a toll on a 450cc motocross bike designed to run at sea level. Has plenty of power to have an amazing experience on a snowbike. Like I stated earlier, most of the time a 450 or even the 350 The 20-horsepower jet installed, the bike was a completely different animal. Sensing centrifugal clutch setup, when you pull in the clutch and shift, you loose the boost.Īgain, I'm not saying that a turbo setup isn't right for you (not all horses are race horses).Īnother option that I was skeptical about was the IceAge nitrous oxide system that we put on a 2016 KTM 450 SX-F project bike. Third gear and the turbo spools up it is an amazing experience.The problem is that experience is very short lived. The problem isn't with the turbo it's self, but rather the design and gear ratios in the motorcycle transmission. Big, open meadows, long wide-open climbs and deep powder. Place is exactly where you would want a turbo on a sled. According to Sieg and Polaris hillclimb champion Keith Curtis, the turbocharged snowbike has its place. Because the snowbike allows you to skirt through trees that are 35-inches wide, it's hard for me not to spend the majority of the rideĭucking under branches. I've learned over the years, that you just need to look at what the pros ride for personal equipment and that will be a pretty good Jumps myself, and learned pretty quick that you have to have a lot of speed to get good distance in soft snow. Photos I've ever seen on snow are of him hucking his Timbersled off the top of huge Revelstoke mountains. As most of you reading this have probably seen on videos or through social media, Reagan Sieg goes big. I got to spend some time hanging out and riding with Reagan Sieg this past season, and if there is one person that knows a thing or twoĪbout snowbikes, Reagan is the man. I started to do a little homework online and found out the "big boys" were running 520- and 600-cc big bore kits. I learned pretty quick that my mountain horse needed more ponies. If I said that I didn't miss the sound of the TIAL wastegate. Gaining elevation straight up the mountain on a 50-hp machine just isn't the same as it was on the turbo sled. Now the dilemma: These steep tree lines are steep! The snow here in northern Utah is dry and deep for at least the first two months of Lines and nastiest drainages where my 200 hp snowmobile would have been tips up (for the record, I haven't had to use a shovel to dig out I realized that I matter how good of a rider I was, this "horse" was not exactly made for racing snowmobiles to the warming hut.Īs the season progressed I found myself getting off the trail as soon as possible and ripping through trees on my way to the steepest tree So, the first time I left the truck on a 55-horsepower KTM 500 XC-W, I had my doubts. I personally came off an intercooled Boondocker-equipped HCR 800 that made over 200 Just like a majority of newbie snowbikers, I crossed over from big-mountain backcountry snowmobiling. With that being said, I've always had a the desire to push anything with a motor to its limits. Of the front bumper of my mom's Buick Regal. A wise man once said to me, “Son, not all horses are race horses.” I'm pretty sure he told me that after finding weeds and dirt hanging out
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