Help!!! My bike won't start - so I took the Carb off to see if it was gunked up. To my suprise it was very clean... In the process the float valve needle fell in the bowl - so im not sure how it goes back in - i think it goes under the float bracket with point down? Does it? Also Spark plug is wet so I replaced it and still no go!!! It seems to be flooding - need to get runnning for xmas present!!
2007-12-21 07:58:11 · 6 answers · asked by Stan 2 in Cars & Transportation ➔ Motorcycles
OK - I replaced the plug and finally found out whats going on. It's flooding!!! but why? If I turn the gas line off and kick a few times to exit some of the gas - it fires right up... then I can turn the gas back on and give a little choke and it will run. Any ideas? The point on the flost valve looks good. Point goes down right?
2007-12-23 07:10:58 · update #1
hey mines a ducati.take it to a mechanic.
2007-12-21 08:07:04 · answer #1 · answered by Bugzy M 2 · 0⤊ 3⤋
http://houseofmotorcycles.bikebandit.com/kawasaki-motorcycle-kx80-kx80w3-us-2000/o/m3921
that is a page that shows a fairly detailed exploded mechanical diagram of a 2000 KX80 carb. with the carb in the as installed condition, the point of the float needle will point up, so that when the float bowl is full of fuel, the float will float upward, which will raise the float needle to where the pointed portion will seal up against the seat and therefore cutting off the supply of fuel... that's the entire function of the float & float needle... then as the fuel is used out of the float bowl, the float will drop, opening up the needle allowing more fuel to flow in...
ok, so you say the plug is wet, so it's getting fuel into the cylinder... have you checked & cleaned the air filter??? if the air filter is overly dirty, that would limit the air flow, causing the gas / air ratio to be wetter causing a wet fouled plug.
are you sure you are getting spark??? take the fresh plug out, snap the spark plug cap onto the top of the plug, ground out the body of the plug to the side of the cylinder so you can watch for a spark between the center electrode and the little metal finger of the plug, kick the kick starter thru and see if there is spark.
additionally, after you get everything put back together and before you re-install the spark plug... kick the bike over 8-10 times to blow the excessive fuel out of the cylinder...
all those are pretty easy to inspect and pretty quick... after you have done the above, and you have spark, make sure the gap is set on the plug, re-install and try starting again... if still nothing, you will need to run a compression check to insure there is enough compression...
good luck and Merry Christmas!!!
2007-12-21 16:46:11 · answer #2 · answered by pmk 6 · 1⤊ 0⤋
Yes the needle valve goes under the float bracket. And your spark plug is probably fouled replace it and when you put the throttle cylinder back in the top of the carb twist it Intel it goes in all the way or it will be stuck in full throttle.
2 strokes are bad on fouling plugs keep a few spares around, NGK are the best.
Yes you have the needle valve right check your float to see if it has a little hole in it or shake it make sure it has no gas in it if it does replace it or for a quick fix put a little JB-weld on the hole.
2007-12-21 16:11:00 · answer #3 · answered by Anonymous · 1⤊ 0⤋
The point goes into the seat in the carb body. A wet plug indicates a flood condition. A flood condition will lower compression to the point of no-start even after a dry,clean plug is installed. Before you install the carb you need to dry-up all signs of gas with a rag. Take the fuel tank off and place outside. Take a propane torch to the empty sparkplug hole to dryout the internal cylinder hole to purge any leftover fuel and to warm the cylinder internally to a luke-warm temp. Warning-this may produce a short-lived flame and /or movement of the engine cycle! To test the carb for proper needle and seat operation just connect a tube on the fuel inlet side (while it is in your hands and empty of fuel,and fully assembled) and bow into it with your mouth as you move it from upside down to rightside up. When you move it rightside up the float should pressure the needle and seat closed-not allowing anything to pass-period! You then can reassemble the whole thing,making sure of no fuel leaks external or internal. It should start with 1 or 2 kicks of the kickstarter if the choke is properly set. If not then extract the plug and inspect for fuel on it. If it is still dry then reassemble and kick again a couple of times. A 'pop' means to turn the choke off. Hold the throttle open at this 'change' and continue to kick until no start or tries to run is achieved. Re-peat this scinerio until you have achieved the engine running at part throttle. Once it is properly warmed-up you may then begin to adjust the air/fuel ratios at idle. One last thing-make certain that the right oil is in the crankcase for the temperature of the machine.
2007-12-21 16:41:26 · answer #4 · answered by racer123 5 · 0⤊ 2⤋
do not put a torch up to the cylinder!!! kicking it over a few times with the spark plug removed will remove any excess fuel out of the cylinder... I would also recommend pressing the kill switch while doing this to prevent damage to the CDI unit.
2007-12-21 16:56:18 · answer #5 · answered by KelleyXR 2 · 1⤊ 0⤋
If it's more than 3 years old, it may need a top end rebuild (cylinder, piston & rings).
Low compression will not be able to compress the fuel to make it volitile enough to explode and foul the plug.
2007-12-21 16:13:44 · answer #6 · answered by guardrailjim 7 · 0⤊ 1⤋