100,000 KM on well maintained and non abused sportbikes.
Maybe
It's almost impossible to set a specific number for high mileage on any bike. It all depends on how it was ridden during the break in period, and how it was ridden during the rest of the mileage on it. a 20,000 mile bike might run worse then a 80,000 mileage one.
High mileage is almost always considered anything over 100,000 miles for a 2003 model.
it depends on how high a cliff you throw it off of.
around 8000 clicks
30000 miles
Average mileage per year is 10-14,000 on a vehicle, so more than this would be high mileage.
You may want to know if you can ride your dirt bike on a sidewalk. Anyone that has one ask police first. Then make sure no ones on the sidewalk then maybe you can. You can be asking if you have permission to ride a dirt bike on the side walk, or if the dirt bike will function right on the sidewalk. Like the above comment you have to ask a cop and not ride when to much people are there. The bike will function right but might jump high if you go over a bump.
You need to be big enough to be able to find a bike that fits, then just go for it.
75000+
i own a 2002 f150 and it has 196,000 miles and still runs great. Over 150,000 miles is considered high mileage on any vehicle. That does not necessarily mean there is something wrong with it.