I purchased a 2021 ZR Blast, and am completely in love with that snowmobile. In fact, I will be buying another one to add to our family fleet. I love that its light, nimble and is easily used by a wide variety of riders with varying skill levels. The fun factor is bar none.
Mine tops out just under 70mph. It wont win a lake race, but it has shamed some fullsize sleds when riding the tight twisties. (Its like cheating)
Ive replaced the single-runner carbides with offset versions from AC, which transformed the front end for more positive cornering, and nearly eliminated any trail darting.
Ideally, Id prefer a stiffer suspension, but Im a Sasquatch. The current shocks work well for a variety of trail riders, which is the point, and they also keep the Blast Retail price affordable. You have the option to crank the rear torsion springs up/down, but If you are riding aggressively in ditches or off jumps, youll probably want to upgrade the shock package, or just go buy a ZR 600 RR.
There is one area needing improvement though, and its the clutching.
If your Blast has run anything like mine, it hasn’t been perfect. Mine would load up on the bottom end, kinda clean itself out, go like a raped ape in mid-range and then fall flat on its face. With that, you could hear the engine pinging and could expect a 1324 Code to flash on your gauge, which is a Knock Sensor.
Team Arctic racers competing with the Blast, and a couple reputable dealers, have reached out with a twelve cent fix to the varying runability. Quite simply, the CVTech TrailBloc clutch needs heavier weights.
Peak operating RPM should be 7600. That said, its a flat curve getting there. There is very little difference noticed between 7200-7600 RPM.
Below is a look at how to add two pennies to each weight (6), and your runability issues are solved. No more bogs, lean run conditions or knock sensor being tripped. If you don’t have the correct tools to perform this, Id recommend you visit your dealer.