Motorcycle Repair: Suzuki gz250, suzuki gz250, cause havoc

Question
Started fine until a couple of days ago, Now it just cranks. Battery is fine, you can smell gas, seems like there is no spark. What do you suggest and where do I start looking?  1999 gz250
1400 miles

Answer
Rachel,
 Remove both plugs, put them back in the wire caps and hold the threads to ground on the bike, any bare metal.  Checking one plug at a time, crank the engine over an watch for strong blue spark.  If you get one on both plugs you may be dealing with a flooding carburator.  If so, follow these instructions on cleaning and adjusting carbs.:   
 Disassemble, clean all jets and orifaces with solvent and COMPRESSED AIR ONLY, use NO wire or picks to clean holes/airways. Rebuild carbs with new gaskets and make sure your floats are set correctly. . Do not overlook the float level, be very sure you are not starving for fuel or allowing too much to enter (there is a hieght setting for these in the manual). Inspect the needle valve for smooth operaration and any wear and debris. In relation make sure fuel flow is unobstructed and use a good in-line fuel filter from the tank to the carb. Even tiny particles in the fuel can get logged in critical areas and cause havoc.  
 If you have no spark on both plugs you may be dealing with a bad igniter unit or loose conection in the stator (bike's altenator).  Coils, plugs and coil wires are unlikly since it would be a terrible coincidence they both failed at the same time, this is not impossible though.


Hope this helps, Mike