A wire brush, emery cloth and solvent. Then check the gap.
make sure fuel is getting to the carb, clean your carb and jets (in carb) check spark plug, kick harder, give it some gas if a 2 stroke
Change gas, clean spark plug, clean carburetor if needed and adjust it.
is the question being answered?
probably guest old or dead
Clean the carb, clean out the gas tank, change the engine oil and filter if it is a 4 stroke.
A street legal dirt bike is any dirt bike that has a four stroke motor, head lights, brake lights, turning signals, a spark arrestor in the silencer, and street legal on-off road tires.
It's a dirt bike that uses a 2-stroke engine.
depends 2 stroke of 4 stroke and racing bike or a trail bike
Normally a thirty thousandths gap will serve just fine. Make sure you have the correct plug, and then obey the commandments for making two-stroke engines reliable: Clean air Clean fuel Good quality (or better) air-cooled two stroke oil. No "outboard two-stroke oil" - that's for water cooled engines. If you've been running without an air cleaner, there will be plenty of dirt to live with for a while, and that will end up "bridging" the spark plug gap and the bike will refuse to run properly, or maybe at all.
If you put 4 stroke what in it
4 stroke
Depends if its 2 stroke or 4 stroke. A 2 stroke bike you can tell by the RPMS which they will be real high which your bike will be very loud. Also if you have a 4 stroke bike you can shift anytime just 4 stroke bikes have torque all the time. so it really depends if your racing just cruising or whatever it all depends on what you r doing.