Dirt Track Racing

yes he is the queerest person on the planet and needs to go die in a hole and then let it rot on top of him then put him in a different hole and let it rot on top of him etc.

he takes it in the ass

It all depends on the rider. The 2003 Yamaha YZ250 has a seat height of 38.9 inches and weighs 213.8 lbs. If you're tall enough that your feet can touch the ground while sitting on the bike and you're strong enough to hold it up, you are probably physically able to ride one. The best way to find out is to go to the nearest Yamaha dealership and ask to sit on a YZ250. The model year won't matter too much, they'll be pretty similar. Remember that you'll have on a bunch of safety gear when you're riding it, too.

The dimensions depend on what the track is for. For example, you can travel by train from Moscow to Vladivostok and the railway track for that journey is 7826 km long.

Most dirt bikes wont go over 100km/h because they are geared for off-roading. If you've ever gone 60 km/h off road you'll know it feels insanely fast. As regards the fastest dirtbike. The BMW HP2 has a 125mph claimed top speed in comparison to the KTM Super Enduro's 120mph claimed top speed..
Keep in mind that both these beasts are 100cc+ monsters.

leaking head gasket or improper fluid in cooling system

Well, there are a few minor mods you can do to increase the power, but if you really want more power, I would recommend getting a bigger bike, like a 150 cc scooter. But for the pocket bike here are a few things you can do:

1. Buy a big bore kit.

2. re jet the carburetor, and upgrade the air intake and exhaust.

3. Change the gearing [higher ratio=faster speed, less acceleration, lower= more power less speed.

4. Possibly fit a bigger motor in [if you are good with welding and machinery.

5. Find some sort of multi ratio transmission, like a CVT or 3 speed gearbox that will fit.

Over all, getting a bigger bike is the best way, but hopefully these upgrades will help.

You usually don't see that BEFORE a race, unless it's during a practice session. What they are doing is scraping off rubber that was picked up on the hot tires in order to find the wear indicators. These are little "holes" in the tire surface. By measureing how deep the hole is, it tells them how much rubber is left on the tire, which then tells them how much tire wear there was on that run. There are about 5 holes across the tire, and at about 6 places around the tire. So this can tell them a lot about how the car set up is working. By heating and scraping off the build-up, it gives them a more accurate measurement, by making sure they are measureing the surface of the tire, and not the build-up. The build-up is usually picked up when the car drops down to the apron to come into the pits. I have seen teams ruff up tires with a wire brush or in some cases steel for traction

pretty good they can hold up to 300 pounds