bike wont start grrrrrrr

[jos21802001]

Ok first off I ran it all last year no problems then it started giving me problems to start b4 riding season got to cold. Well the problem for rough starting was bad bowl gasket. Went to yamaha and got a new one put it on. The was a little hard to start but bowl was dry no problem there got it running and it ran good. well couple days later went out and it just doesnt want to start at all. i took all the gas out and changed filter. still not wanting to start. It would back fire alittle. then i got some starting fluide sprsayed a little in it. started back firing a little more and blue flame out the 2nd over carb from left side of bike. then it back like i was shooting my shotgun my ears still ringing......funny thing is i live right across (like 40 feet from the New Market police department ) it back fired 3 times and still not starting. It is getting fuel i can seee that in each carb. I took my wire checking tool out and it is getting fire. Put new battery in it. The new fuel filter and gas. The sparkplugs i changed in oct ti ngk irn. The coils are good ... i dont understand she was running fine less then a week ago grrrrrrr. I know i need to scy the carbs but she runs with the setting it is at now with no problems just not wanting to idle. so please give me some input to help me out.

[jos21802001]

i also re wrpped exhaust and hoping my 3year old didnt put something down exhaust

[jos21802001]

took un wrapped exhuast and took slip on off nothing there was hoping there was grrrr back to the drawing board. and yes still no start funny the cop cars are driving around now must think someone was having fun with a gun if they only knew it was my bike

[rotortech]

A couple of comments:

The bowl gasket had nothing to do with not starting. Now the leak is fixed. It pops and backfires so you have fuel and spark. Good.

You say there is flame shooting out of one of the carbs. That means you must be trying to start with the airbox off - correct? Put the air box on and start it.

The bike will start and run without the airbox but not always depending on how lean it is running. Even if it runs you can't give it any throttle with the airbox off.

If it still acts goofy you may have to check the firing order. It sounds like you had it running after changing plugs but I mention firing order in case you had the wires off and on since then.

[yamaha_george]

hi,
if the bike has been standing, changing to fresh fuel will not help without cleaning the carbs (particularly pilot jets) put the battery to charge over night so to be sure you have full volts/amps to the firing system & you are not "drowning" the spark.

Check the plus are a} clean & b} dry and the spark plug leads are in the right order.

[racerd14666]

sounds like you need a valve adjustment, even if your float bowl is leaking the fuel pump is still gonna keep pushing fuel into there until the float stops the flow. between the rough starting and now firing through the carb id say its a good place to start with out knowing what kinda mileage the bikes got. you can confirm this with a compression/leak down test

[jos21802001]

right b4 i got the bike the carbs and vavles were all gone though and adjusted and cleaned from motorcycle tech. 17k miles i found problem the ngk plugs where carbon fouled so on ebay to find a carb syc tool and going to get new plug very very week spark from the plugs. thank you for all the comments will be getting my nephew to gets some nice vids this summer so i will be putting links up. so kinda good thing cuase now i'm fiking some of the same things why it is all apart like lights paint and little things .

[sweekster]

Why people never check the WIKI is beyond me http://fzronline.com/wiki/doku.php?id=synch_tool <click there.