as above... wont start.....
the starter is cranking the engine, but there is **** all spark!!
na = engine turning, boom = sound like engine is sparking...

na na na na boom, na na na na na n an an na na boom...

and then sometimes it would even boom at all!!
please help me urgently!!!! i need my bike...

 

sounds like sparkplugs, check ur sparkplugs and see if there fouled out. im 90% sure thats what it is but if not check ur fuel lines comin from the tank goin to the throttle bodies might be clogged but for sure check ur plugs asap.

 

one more thing have u got it runnin since the problem? if so does it sound like a lawnmower?

 

fuel lines arnt blocked as petrol is exiting exhaust vapourised... how do we get plugs out without dropping the engine.. looks to be a very tight fit for sockets and wrenches!!

 

your gonna have to go from the top, pull the tank up, remove the air box and u should be able to reach them. another alternative(which ive heard was a pain in the ***) is drop the radiator(not remove it just unbolt it and drop itlow). my personal opinion would be to go from the top and raise the gas tank. if your fuel lines are good then ur not gettin a spark, but if u do go that route make sure u dont mix up the sparkplug wires take one off at a time and check it.

 

ya sounds like plugs fouled...
eventually u will get no "boom" and a dead battery, my old fzr fouls plugs at least 2 times a year

 

i had a 93 f2 that used to go threw plugs like 6 times a year it seemed, i didnt know **** bout adjusting the carbs so i took it to a shop (not a honda cert. shop) and payed them to "adjust the carbs" but still had the same problem. end up gettin rid of it to get a 954 and havent had a problem yet and i put 16,000 on it. u had a old fzr? im deployed right now but over here in iraq i ran into a dude that had a fzr like a 400 or somethin, he was gonna let me ride it but metal plates on ur chest, back, and sides dont make it easy. i wanted to buy it for a project but havent ran across it again.

 

Here is my FZR, total one of a kind...going on ebay soon $2500 is what i want for it.
http://www.teamneon.com/fzr.html

 

im not sure if you have gotten your bike running yet, but have you recently tiped your bike over? or had the front off? it might be your tip over switch its mounted to your front fairing stay? there is a small ball bearing in the box and sometimes they dont get good contact or you might have forgotten to plug it in if you had your front off.

 

If it has been a while since you started it that would indicate spark plugs also