Re-occuring fuse problem

[RyanHjelmeland]

So to start
the title was supposed to say plug not fuse , i am this bad i know

1996 kat 600
20,000km
good battery
the bike was good for about 1000km and then started running only on the two right side cylinders
there was a fuel hose kinked up , i cleared that , cleaned off the spark plugs and the bike was working for a few laps around the block but i am an idiot and had it on prime and left the bike on prime overnight and came back in the morning to see a tank of gass all over the floor and bike wouldnt start , starter was good just no spark , killed the battery trying , jumped it with my other bike and cleaned all the plugs bike started and again was good for a few laps and then i ran out of gas at my garage door , when i re fueld it the two left side cylinders were out again and it was a serious pos to start and wouldnt stay going without giving it some gas

what is causing these 2 left side plugs to keep fouling ? did i f@#$ the bike when i left it on prime ?
thanks for your time and knowledge oh wise and all knowing kat masters

is it possible i am not tightening these 2 plugs tight enough? i only use the cheap sparkplug tool and go easy because i hear horror stories of cranking through the threads and having bigger problems

[rexazz2]

If the bike being left on prime dumped fuel you have carb issues
if you have carb issues it is flooding and weting /fouling the plugs

Carbs 101 for rebuild ,check the petcock function and a new set of plugs and your problems should go away

[stretched600]

If the bike being left on prime dumped fuel you have carb issues

Not true at all...Prime is designed to let fuel flow to the carbs with or without the motor running. So once the bowls are full, gas has no choice but to come out of the overflows to the floor. Now I do have to say that if it went into the cylinders and crankcase as well, you will definitely need to pull your carbs and replace the float and bowl seals. Also, anytime you foul plugs just be prepared to buy new ones because they only dry out 2-3 times before they become dysfunctional. Hope this will help you get it straightened out
Oh btw, Welcome from NC!!!

Oh can't forget change your oil!!! If you got gas in the crankcase DEFINITELY change the oil as it will cause it to smoke like h3ll and dies when it warms up

[Kreylyn]

Not true at all...Prime is designed to let fuel flow to the carbs with or without the motor running. So once the bowls are full, gas has no choice but to come out of the overflows to the floor. Now I do have to say that if it went into the cylinders and crankcase as well, you will definitely need to pull your carbs and replace the float and bowl seals. Also, anytime you foul plugs just be prepared to buy new ones because they only dry out 2-3 times before they become dysfunctional. Hope this will help you get it straightened out
Oh btw, Welcome from NC!!!

Oh can't forget change your oil!!! If you got gas in the crankcase DEFINITELY change the oil as it will cause it to smoke like h3ll and dies when it warms up

Sorry, but that isn't right.

1. Kat carbs have no over flows... this is why the airbox and crank case get the flooded fuel.

2. Float needles are there to stop the flow of fuel on all carbs. Their purpose is to stop the fuel from flowing when the bowl is full. The carb floats are what "measure" this... so when the bowl is full of fuel, the float presses against the float needle sealing off the flow of fuel. A great deal of carbed bikes have non vacuum operated petcocks that always flow fuel (manual on and off settings). They don't flood because the float needle works. This is also why it's not a petcock issue if the fuel is flooding out of the carbs... it's a float needle issue inside the carbs... thus a carb issue.

Krey

[Wild-Bill]

...once the bowls are full, gas has no choice but to come out of the overflows to the floor...

First of all, they're not overflow tubes, they're vents. Before the fuel level gets that high it's already pouring into the intakes.
Second, even with the petcock on PRI you shouldn't have flooding issues. Not if the float needles are seating. If everything's good in the carbs then even when the petcock is left on PRI, the floats will cut off the fuel flow when the bowls are full. That's what they're there for.

The other thing the floats do is regulate the fuel level in the bowls while the bike is running. #1 and #2 carbs have bad float needles. They're not regulating the flow when the bike's running and they're not shutting off the flow when the engine's not running.

[scottynoface]

So once the bowls are full, gas has no choice but to come out of the overflows to the floor.

[RyanHjelmeland]

Can i open the top of the carbs without taking them off the bike ? can i just unscrew these tops and look inside and see whats going on in there before i take the carbs off ?

[phantasm]

Nope. Floats and bowls (where the problem is ) are on the bottom of carbs. Hit the wiki at the top of the page and download carbs101.

[stretched600]

Well thanks for correcting me. I had the right idea wrong explanation

[RyanHjelmeland]

the bike heals itself

i poke at it and do nothing really but hope and pray because im scared to take off the carbs and somehow the bike is running on all 4 now and starts easy but after running for 10 or 20 minutes it seems to want to die on low rpm, idles and i have to keep the gas going in fear of a stall at a light and it will start up if it stalls but if it stalls twice its game over , I have a feeling it might even be something to do with the throttle ?? it is really nothing for the first quarter turn then it gets to the real gas-to-engine feeling , compared to other bikes i have been on i can tell theres something going on with the gas at low rpms and the handle for the throttle is useless lowand isnt smooth so would it be worth looking into the trottle cable for adjustments ?, do you guys still think its the float needles ?

[Kreylyn]

i poke at it and do nothing really but hope and pray because im scared to take off the carbs and somehow the bike is running on all 4 now and starts easy but after running for 10 or 20 minutes it seems to want to die on low rpm, idles and i have to keep the gas going in fear of a stall at a light and it will start up if it stalls but if it stalls twice its game over , I have a feeling it might even be something to do with the throttle ?? it is really nothing for the first quarter turn then it gets to the real gas-to-engine feeling , compared to other bikes i have been on i can tell theres something going on with the gas at low rpms and the handle for the throttle is useless lowand isnt smooth so would it be worth looking into the trottle cable for adjustments ?, do you guys still think its the float needles ?

YES!

And that issue has caused other issues for you. See, when the fuel leaks out of the carbs it has to go somewhere... like into your crank case and mix with the oil. The engine cools each piston by spraying engine oil on the bottom of them... if that oil has gas in it, then that will enrichen the mix in the combustion chamber. This happens more when it's hot, so now... you warm up the engine and now it's running rich.

Fix the carbs...

Then change your oil.

Krey