Cant start bike after been in garage for 3 months.

Hi try draining the old fuel from the carbs their is a small drain screw on the bottom of each bowl, you may need to clean and dry the spark plugs because bad fuel won't evaporate.

You have 2 solutions : take out the spark plugs and dry them with cloth, put them back in and start the bike.
Or, leave the bike over the night and the excess fuel on spark plugs will evaporate.
If the engine is hot and you have this problem, just leave the bike for half an hour and start it.

Check the fuel tap is turned on and that the fuel filter is clean. If this is all good, you should check that fuel is getting into the fuel reservoir on the carb. If no fuel is getting through, your fuel pump may have failed. But, as you don't say the make and model of your bike, I can't be sure.

This may help you determine the problem.
1. is sprkplug oil fouled? wet? dry? superhot and white electrode?
A sparkplug will always tell you whats going on.
if its too wet then its not burning all the fuel and oil and flooding out.
if its extremely hot and white, then its running lean , and needs more fuel.
also make sure your running 50:1 fuel oil mix.
a hot two stroke is hard to start.
if plug is dry, then its not getting enough fuel.

2. make sure your fuel oil mixture is 50:1.
to much oil is okay but it may smoke alot
way to much oil will oil foul the plug and plug will have oil on it.
to little oil will make the bike run hot and start damaging the bottom end crank bearings as well as your rings , then piston and cylinder walls.
the plug will be whitish and hot.

3. as for the timing , the rotor is resting on a keyway on the crankshaft and will only move out of time if the keyway is sheared.

4. make sure you have good spark when bike wont start.
a coil that is going bad will work cold but may not when it gets warmed up

to sum it up check to make sure you have correct fuel mixture
check you sparkplug to see how its burning
make sure you have good spark

if you have good spark, good fuel, good compression, then it should start within 2 kicks everytime.
i have a blaster 2 stoke 4 wheeler, starts everytimesince i rebuilt it.
i hope this helps you out and you can enjoy the rest of the summer with your dirtbike.
best regards
Big Al

There has been storage problems with the fuel we now have with ethanol. When storing or parking for more than a week or two, the fuel sets in the tank and carb and plugs jets and small passages. Sometimes, and I say sometimes, putting SeaFoam, Lucas, or other carb and fuel injection cleaner in the tank and running it at a high idle will help. When you are able to put in gear and it keeps running, ride it several miles ensuring it will keep running.

If the cleaner doesn't do the trick, then the carb or carbs need to be dissasembled and cleaned.

As this point you can't get the bike to turn over is this correct? If the engine is turning over but won't start then yes the gas is most likely the problem. Gas after sitting for even a month can evaporate from the fuel system and it leave a fouls smelling deposit behind that clogs up everything. It stinks and it's a mess to clean out. To prevent this from happening use a product that is called "Fuel Stabilizer" in the last few tanks of gas before you put the bike away for the winter or a dormant period. If the motorcycle is in a hot climate or heated garage this foul smelling gas can happen within a few weeks.

First make certain the fuel is fresh ,and drain any old fuel out of the carb ,small screw at the bottom of the float bowl.when dry turn fuel on ,if flow starts again no blockage .start bike now,if no fix, remove spark plug if it is dry the carb is blocked . touch plug to cylinder head and start be carefull not to shock yourself use pliers . If no bright blue spark check side stand cut out switch ,kill switch . if the battery has been left uncharged for more than 2-3 months replace as wont work well. to check for seizure remove plug and push bike in first gear you should hear and feel the engine turn.

hi friend,
Step 1
Move switch to ON positionLocate your dirt bikes OFF/ON, RUN/OFF, or START Switch. Use your finger to move the switch to the RUN, ON, or START position.

Step 2 Turn fuel switch ONLook on the side of your dirt bike near the engine and locate the "FUEL ON/OFF" switch. Use your finger to move the lever to the "ON" position. Your dirt bike will not start if the fuel is turned off. This off switch helps prevent fuel leaks when your dirt bike is stored.

Step 3 Turn choke ONIf your dirt bike engine isn’t warm, you will need to turn the choke on to start the bike. Locate the choke lever near the engine on the side of your dirt bike, probably not far from the "FUEL ON/OFF" switch. Use your finger to move the choke lever to the on position. Once your dirt bike has started and the engine has warmed up, you will need to move the choke lever to the "off" position.

Step 4 Foot on kick start pegBend your knee and place your foot on the kick start peg while leaning your weight on your other foot. Stand slightly and push the kick starter all the way down with as much force as you can.

Step 5 Push all the way downIf the bike doesn't start after the first attempt to kick start it, try again. Remember to push the peg as far down as it will go with as much of your weight as possible.

jQuery('.article ol .image').each(function(i,e){ var $this = jQuery(this); $this.find('img').error(function(){ jQuery(this).remove(); $this.remove(); }); }); Tips & Warnings

• If your dirt bike has a four-stroke compression engine and won't start, release the compression valve and try starting it again.
• Sometimes, the engine remains in a compressed position and cannot turnover until the pressure is released.
• If your dirt bike is equipped with an electric-starter, but won't start, you can follow these steps and kick start it.
• Remember: always wear safety equipment when operating a dirt bike or ATV.
• You should at least wear a helmet, boots that cover your ankles, and a chest protector to avoid serious injury.
• Always supervise children when operating motor vehicles.

hope this helps u
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regards
sivaranjini

sounds like the fuel is being evaporated by the heat hence hard to start when hot, but when it cools down enough the fuel is not effected, check fuel filter & fuel pump pressure,

http://manualfile.com/Motorcycle/Kawasaki/kawasaki-ninja-zx-12r-factory-service-manual.html

here is a manual to help.

CARBS ARE FLOODING DID YOU TURN OFF GAS WHEN YOU LEFT THE BIKE STANDING THE PIES YOU ARE TALKING ABOUT ARE THE CRANK AND AIR BOX BREATHERS YOU NEED TO TURN OFF FUEL AND DRAIN THE CARBS KEEP THE BIKE CENTER THEN TURN FUEL BACK ON LEAVE FOR 5 MINS THEN START THE BIKE IT SHOULDNT LEAK ANYMORE