I HAVE A 1995 KAWASAKI NINJA Zx7 and it just wont start . It spins but dosent want to start. I got a new battery. Clean the gas. Cleaned the carbs. one day i put sum starting fluid in it and i got it started but it ran horable,, idling up and down ,,and spitting flames out the exhasut. And when i hit the gas if i do get it started it just bogs right out . Well the only thing i didnt do was put new spark plugs in it. But i didnt think it needed it caz it is getting spark. But MAYBE there is a fouled spark plug .......can that make it run bad or make it not even start???????...... Well i dont no what else to do .... what else can it be ...i checked the hoses and it is deffently getting fuel.... and i changed the fuel filter to ....it seems like it isnt timed rite or suttin when it is started .....but im lost ...CAN U PLEASE HELP ME CAZ I REALLY DONT WANT TO BRING IT TO A PLACE AND HAVE TO PAY A FORTUNE !!!! p.s it has been sitting over the winter so can spark plugs make a bike run bad or not even want to kick over...caz it is getting spark but i never checked the plugs yet.. ??? THANKS SO MUCH

 

kinda sounds like your timing may be off. Possibly fouled spark plugs.

 

sounds like its acarb problem.

 

YEP! My first thought was timing too...Flames shouldn't be coming out of the exhaust...
RB