Bike will not start at all

It's definitely not the outside temperature ... well running bike will start even in sub zero temperature.

You either don't have good spark or fuel supply is questionable. If your battery is weak, that would be one cause. The battery might spin the starter, but it might not be spinning it fast enough. So, start with putting the battery on charger so it's fully charged. Secondly, your fuel might be bad, especially if it sit the whole winter without a stabilizer in the tank. You might have to dump the tank and get a fresh fuel. These two things are the usual after winter culprits.

 

Definitely try charging the battery, or get a boost from a (non-running!) car. All of the FZRs like a lot of voltage at the coils, and if it comes down to an argument between the starter and the coils as to who gets the power, the spark plugs lose.

 

Don is right, once the battery goes flat the bike will not start even if pushed.
Sounds like the fuel in the carbs may have deteriorated while sitting. The carb float chambers are not sealed from atmosphere and some of the components of the fuel mix evaporate out leaving a mix that will not support ignition.

I learnt this lesson when I bought my bike from the bike shop where it had been sitting for a long time, it would not start and the mechanic opened the carb float drains and let all the old fuel out. Closed the drains, opened the tank tap and it started after a few turns

 

mine been laid up for 5 months,took a bit of starting,have found best to put on choke turn over and do not use any thottle at all ,just let it tick over for bit ,then took round block for a good thrash was fine ,plus i have a smart battery charger so battery ready at all times only problem i have had with this is my battery acid goes down very fast and it is not leaking any where ,any one else had this problem,it only loses acid when charger on at all times .my mate has same charger and his battery does not use acid.

 

The fuel going bad in the floats is easily preventable by draining the floats before putting the bike to winter sleep.

 

If you have a 2KR or 3LN1, then yes, it's internal and you have to remove the exhaust. <!-- s --><img src="{SMILIES_PATH}/icon_sad.gif" alt="" title="Sad" /><!-- s -->

The 3LN3+ had external spin-on filters.

 

Maybe try starting it with the choke incase the pilot jets are clogged (which might help) or maybe try putting a small amount of fuel down the carbs (through the airbox). This is how I trouble shot my friends bike (which ended up being clogged pilot jets). If that starts but dies quickly then its likely a fuel issue (ie. well clogged jets), if it doesn't its more likely a spark issue.
Also if you still have your old plugs (or a spare new one), try pulling off each spark lead (one at a time) and plugging in the old plug and earthing it (against the chassis/engine etc.) to see if it is actually sparking.

 

Thats the fuel pump. The pump might be on the wrong way i.e., the pump is actually sucking air from the carbies instead of the other way round.

To test you can either:
#1 disconnect Red Hose from pump, connect to fuel tap with the fuel filter. See if it kicks over then.
Or if you dont mind fuel,
#2 pull the red hose off the carbie and see if the pump pushes fuel.

I know my pump died and currently grav feeding the fizzer.

 

You didn't say .... whether you have charged the battery up? Changing spark plugs does most likely nothing, plus judging spark plugs on 4 stroke is close to useless unless you pull them right after you shut an engine off .... which is impossible 99% of time.

My guess, would be either weak spark, or clogged jets (assuming you ruled the battery out). A very good and easy test to figure out whether your fuel supply is not functioning (and at the same time confirming that your spark is fine) is to use propane. It's cheap, safe and quick. Buy a camping propane bottle. Hook a long fuel line to it, so you can stick it into the air box snorkel, open the vent, let it his for 5 seconds. Shut off and try immediately start the bike on. If it runs, even though very shortly, you know it's fuel. If it doesn't, you go back to either battery/coils or clogged jets ..... my bike had the same issue when I bought it. I did the above bike ran like champ on propane and I knew my carbs must be mess and of course they were. Cleaned them and bike started right away ....

 

BTW, reading about your weather, it sounds like Toronto. snow is back .... you wouldn't happen to live in Canada would you?

 

Maybe I can have a look at your bike when the weather gets nicer. I am in Brampton, so I could perhaps scoot over on the weekend.