Need help. GZ250 willl not start!

[GreeZdLightNin]

Hey yall, I just bought a used 2003 GZ 250 that wont start. I have done the following:
Cleaned carbs twice(jets, needle, bowl, checked floats, not stuck)
New fuel filter
New Spark plug gapped at .6mm

I know gas is getting into the cylinder, ive cleaned the carb, and double checked it.

kickstand is up when trying to start, clutch pulled, fuel is in "on" position,
all hoses are hooked up.

I took spark plug out and kept it plugged in while starting, and toucjed to engine cylinder, and gets spark...

A friend and i tried push starting 10-15 times and still wont start....i have no idea what to do now...ive tried and fixed everything i can think of. wracking my brain!

[gz4me +]

Check valve clearance.(They may be to tight) Check air filter.(dirty or clogged) Check wiring connections from pick-up coil to CDI box. ( loose, broken, or dirty) Test compression. The only other thing I can think of would be sheared key on flywheel.(This would make timing off.)

[gz4me +]

P.S.- Welcome to the forum. More members will be responding shortly. Hopefully we will solve your issue and have you enjoying your GZ.

[GreeZdLightNin]

Originally Posted by gz4me +

Check valve clearance.(They may be to tight) Check air filter.(dirty or clogged) Check wiring connections from pick-up coil to CDI box. ( loose, broken, or dirty) Test compression. The only other thing I can think of would be sheared key on flywheel.(This would make timing off.)

Thanks!...Ok, so i also found something else...i checked the air filter, and there was oil/gas mixture puddled in the bottum of the air box! like 1/2inch full of it...so i cleaned it out, drained the oil, and theres gas mixed in with the oil, put in new oil and tried starting it..nuthing, theres no more oil/gas in the airbox, but nothing...???????

[gz4me +]

What setting is petcock set on? Should be on run or reserve. Sounds like it is on prim. pull spark plug and clean. After changing oil try starting. I will keep my fingers crossed for you. Did you pull the drain plug at the bottom of air box ?

[GreeZdLightNin]

Originally Posted by gz4me +

What setting is petcock set on? Should be on run or reserve. Sounds like it is on prim. pull spark plug and clean. After changing oil try starting. I will keep my fingers crossed for you. Did you pull the drain plug at the bottom of air box ?

I cleaned sparkplug, changed oil, and petcock is set at "ON", and pulled drain plug also. still nada

[gz4me +]

Change air cleaner. What setting is on the petcock? Should be on run or reserve. Sounds like it might be on prim. Some sludge is normal in the bottom of the air box. You should pull the plug on the hose at the bottom of the air box from time to time to drain the crap out. Remember to put the plug back in. If there is gas in oil, change filter as well as oil. Pull plug and clean or replace. Try starting. I will keep my fingers crossed for you.

[GreeZdLightNin]

Yah, iv done all that, still nothing. I cleaned sparkplug, changed oil, and petcock is set at "ON", and pulled drain plug also.

[5th_bike]

Originally Posted by GreeZdLightNin

petcock is set at "ON"

The petcock doesn't have an ON setting. It's either RUN, PRI or RES.

[gz4me +]

Sorry for double post. Lost power to computer. Did not think the first one got sent. Let me get my brain going !! Will be back shortly.