As soon as the first major snowfall hit, I'd pack away my dirt bikes along the side of the garage wall and have to look at them daily as I waited for spring. Once I realized a few die-hard dirt bike riders were still at it in the winter, I started looking into it. Other than dressing warm -- which I mentioned in a previous article – your dirt bike is the biggest consideration. Those knobbies may be great in the dirt – but not as much help on ice or 3-foot drifts.
The prime tire for winter riding – if you can afford it – is one with the spikes permanently installed. If you can, get the carbide-tipped spikes – they'll last much longer, giving you more riding for your dirt bike buck. Speaking of price – it'll seem a little steep at first, but sit back and realize that they'll last for years, and then think about how much it's worth to get all that extra dirt bike time.
If you just can't afford the ready-made tires for riding in the snow, or on ice, you still have a homemade option. Visit your local hardware store or building centre and pick up a bag of hex-head metal screws. If you're okay with spending a little bit more, check your local dirt bike shop, or online, for ice racing screws. As I mentioned, they're a little more expensive than the hardware store option, but tend to stay in the tire longer and grip a little better.
When you're making your own set of winter or ice tires for your dirt bike, it's going to feel a little strange screwing a sharp object into your tire on purpose. Ideally, you want to install as long a screw as possible so it stays put... but not so long that it punctures your inner tube. If you can, use newer or brand new tires since the knobs will be taller/thicker and try not to use screws shorter than half an inch.
If riding your dirt bike in the snow turns out to be a regular and frequent event, keep your eyes open for an extra set of rims for your machine. If you have your winter tires pre-mounted on rims, swapping tires can be done in less than an hour.
If you're going to ride your dirt bike in the snow for more than a few minutes, you'll want to install a shield or protector for the carburetor – otherwise your carb will ice up, and your dirt bike's performance will suffer. If you look around long enough, you can find commercially made shields for some bike models, but a homemade solution is fairly easy to come by. I've seen protectors made from cutting plastic bottles or milk jugs to shape... inner tube pieces zip-tied to the carburetor... and a modified hand guard complete with its own mounting screws. Avoid using any kind of tape to hold the shield in place – it'll often lose its grip in cold and/or wet conditions, and any fuel and oil drips will loosen up the adhesive. The carb area is also an awkward place to clean tape goop out of.