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try some aero start, starting spray, it may help work out what may be wrong.
Try a compression test
drain the carby bowls.though the little drain screws
Did it stop for any reason or it just wont start after it has sat for a time.?
What have you tried?
G'day mate the 1st thing i would go for is float level then compresion if it does have the **** it wont take the fuel in , rules are if it has **** ( induction ) Squeeze (compression) Bang ( spark) and Blow (free exhaust) then it should go, if it was running to lean there is good chance it has a burnt exhaust valve which will greatly drop the compression/induction, also check the valve clearence. hope this helps
If the bike has been in storage for any length of time, more than a year or so, the carburetor is plugged up and needs to disassembled and cleaned. If that's not the case do a compression check. You need to see at least 140 psi of compression for it to start reliably. If the compression is low, adjust the valve tappet clearances (tight valves will cause low compression).
Other than that, make sure the choke is functioning properly and that there are no air leaks between the carburetor and the engine.
You will have to check the float level of the carburator, try too, to blow out with compressed air the primary jet.
You will also have to reset the air-mixture screw and its better to have it a little on the rich side.
Also check the spark plug gap.
Hope this helps!
2 stroke bike are very dependent on compression. and being a bike that is 12 years old my best educated guess is that the top end needs to be rebuilt. i usually have to have the top end done on my honda about every three years.