other then that it just makes your bike nice and loud like the rest of us 
AD: Yeah that is right, even bicycles are illegal to ride on the sidewalk in my home state, so certainly if you lived here you would be cited, towed, and impounded into police storage.
AAD: You have had four days to think about it, yet you still refuse to reveal to us your jurisdiction. So the best answer I can give you, is generally speaking. In general, dirt bikes are restricted to dirt, that is off-road recreation areas. In general, the shoulder of a roadway or designated bike lane is reserved for bicycles and smaller mopeds and scooters. In general, the roadway itself is reserved for the larger, *titled* vehicles. And generally speaking of course, sidewalks are reserved for pedestrians. It appears that you fall under the dirt trails and off-road use category. Your state may or may not also require some type of permit or registration, and therefore you may still be illegal if you do not follow the law.
*/End of Line.
There is nothing wrong with the bike, its not dirty or anything like that, it has been added on the bike to be like that, just letting you know.
generally 2 strokes aren't supposed to idle so they won't foul sparkplugs.
Thanks a lot =)
you want to make sure that when you sit down on the seat that your on your tip toes when you touch the ground. you can ensure this just be raising the seat up.
You also want to make sure that the handle bars are not to close to your knees.
It really depends on how long your legs are. I'm 6'2" and I have a 22" bike. Some short people can ride the same thing because they have legs just as long as me.
If I had to guess though, I'd say 18 inches for you.
but definitally go to a bike shop and test them out. The people there usually know what you need as well.
hope this helps,
You also have to consider do you want to put all your money into the lightest weight bike out there and take the chance that you break it as your learning to ride or do you want to go with a heavier bike and let it stand up to the abuse but slow you down a bit because of the weight. You have to take all of this into consideration, since I'm not really into dirt bike racing I really don't know a lot of the lines out there so I can't really recommend anything. Might try asking other BMX racers out there what they are racing on to get their opinions.
Or if your looking for questions on MOTORcycle dirt bikes you might want to try the MOTORcycle section since this is the bicycle area.
http://local.yahoo.com/results?fr=dd-local-more&stx=dirt+bike+rental&csz=Fresno%2C+CA
secondly, gpx250r's are road bikes, and would be perfect for you. I am 6'4" and 130kg and it even handles me (but it looks like cruelty to small motorbikes)
