Keeping your favorite dirt bike clean is an important step in your regular maintained cycle. While the whole point of it being a dirt bike is for it to get dirty, there are some places that are just not meant to have dirt in them. Dirt in joints or on threads can actually damage your bike over time by grinding and wearing things down.
Ideally, you’ll use a pressure washer. This will get your bike the cleanest. Alternately, if you don’t have a pressure washer you can take your bike to a do-it-yourself car wash that does offer pressure washing.
Managing Your Seat
For best results, take your seat off. Professionals, especially mechanics will remove the seat before cleaning because water will damage the seat’s foam over time. If you’re ultra careful, you can leave your seat on, just make sure to keep as much water away from it as possible.
If you do remove your seat, make sure you take out the air filter and then seal up any hoses that might take on water. Use duct tape to seal anything that you don’t have plus or bolts for so that water doesn’t enter into anywhere it shouldn’t be. The same is true for leaving your seat on. Block any access that will allow water to go where it shouldn’t.
Remove Excess Mud
Use a rubber mallet to knock off any excess mud, especially under the fenders. The mallet method is especially important if the dirt is dry and clumpy. If the dirt is wet you can use a mud scraper, be careful not to scratch the paint. When you get to the chain, clean off the excess with a wire brush. Lastly, remove the handlebar pad.
Time To Wash
Set your bike on its side. Make sure to protect your bike and rest the handlebar on a bike stand. When your bike is on its side you’ll be able to get the water underneath the fenders, tank, and cases.
Give your bike a quick spray with water to loosen the leftover dirt. Let is “soak” for a few minutes to get the leftover dirt wet enough to spray off easily.
Keep the full force of the spray away from bearings and seals. Electrical components on modern bikes are sealed fairly well, but you should still exercise caution.
Turn the bike over and take the skid plate off. Pressure wash this side of the bike completely and make sure to remove all the dirt. While the bike is on its side make sure to scrip the frame and the underside of the motor. Hose the bike off.
While It’s Standing
Stand the bike up and power wash it with your soap mix. Let the bike “soak” for another few minutes with the soap mix on it. Scrub the bike with a soft brush and then rinse it from top to bottom.
Drying Your Dirt Bike
Use a clean towel to dry all of the surfaces that you can reach. When you’re done with the towel, used compressed air to dry all of the areas that you were not able to reach with the towel. Dry your electrical fittings with compressed air and then apply dielectric grease to protect them. Blowing from front to back, dry the radiator fins with compressed air. Use a microfiber towel to dry the lower fork legs. Use the compressed air again to dry the chain. Apply chain lube.
Use contact cleaner to remove any black spots on the plastic. Spray some bike polish onto a microfiber towel and polish your bike. Now your bike should look like new!