As the engine heats up, the valve clearance gets smaller, which holds the exhaust valve from closing completely. Check each valve at TDC on the compression stroke for the proper clearance. Basically you should be able to wiggle the rocker if there's clearance. If not, that is your problem. Valve won't completely close, so no compression. Problem gets worse as it get hot and metal expands. No compression, won't run.
If you have fuel going into your air cleaner box you have a float that is getting stuck and letting fuel run back up into the air cleaner box which then turns and runs into the motor and it hydro locks. If you had the carbs cleaned recently then one of your Tang's got pushed in which is letting the fuel leak
On that suzuki the fuel petcock is vacuum operated it is bad and running gas check the oil for gas it will wash the bearings thats why the air box is full of gas
I know its an old video but this might help someone. You have 2 issues. Your float is stuck open and your petcock needs to be rebuilt. The petcock is leaking and filling your float bowl. To check, pull the line going to the side of your petcock with the valve in the on position. If fuel keeps dripping fromthe petcock, it needs rebuilding.
Thanks Brandon! I will actually pick the bike back again and work on it this coming month! I will try to rebuild the carbs and get a new petcock.. lets see what happens! Ill let you know!
@@winebikediy awesome man. I just did this on my 2003 and it worked great. I purchased the petcock rebuild kit and the carb kit both from K&L Supply. Everything fit like OEM. Good luck man!
Check your ignition coils....on a Kat they are mounted on the top of the valve cover....electronic parts don't like heat and act up when heated...if it was seriously flooded it wouldn't crank that nicely....I have had gas fill a cylinder on my katana once due to bad float needles...and after it cleared out the raw fuel it still started and ran ok...I'm betting it's your ignition system
Hello @punta Cana Biker! I actually had gas.. it showed I didnt, but I had some left still.. But I will fill the tank and still try to run it.. Ill let you know how it goes! thanks for the tip!
I have an 04/ 750 with a similar issue , idle problem ! Mine starts fine , runs good, but sometimes wants to die at idle or rev really high at idle. I have put about 2-3 months into my carbs and I still have the issue. Curious if you solved the issue and how you did it. Happy to chat sometime if you like.
hi I have one that's doing the same thing Ben said when it's hot and it will not run so if you find out what it is please put it on UA-cam so all of us enough
@@captainkilljoy7295 Your carburator is leaking by fuel via the needle seat brass seats. The brass where needle goes into has an o-ring that is worn out.It is leaking gas through. Thereby overfilling the gas bowl. It is a 5mm o ring you can purchase from NAPA. Ensure it is a viton rated for fuel use.
I got mine to stay running. I losened the carbs. Turned them upside down then tightened the fuel air adjustment screws down all the way but not tight. Then I screwed them out 2.5 full turns.
Scott Maddox I also have 89 750 katana. Riding it yesterday bogged on me pulled choke no change do pulled clutch in revved it tried to let it come to idle just died. Started right back up turned around started out normalish little down on power but was cruising at 65 then just died. No start no slight start just dry cranks. Can't figure it out... Any similar issues with yours? I can't find anyone with this year and CC.
@@4g63tpowered cool I'm 2002 Katana 600 we took a trip through the guardrail going 60 on May 8th going to fast sharp corner Wentz wife guard rail on right something told me to put my right knee on the seat where would have been mangled so I went over the guardrail into the grass 30 days of healing but the bike hitch slightly right and slammed into the pavement and stated maybe 15 feet hopefully I slowed to maybe 35 by impact I believe I was in 3rd or 4th gear cosmetic damage it appears I hope she still runs I'm just now healed I haven't tried starting the bike I'm scared my baby dead but I'm hoping she's the tank and fires right up I should know in a day or two Staters seemed to be a common problem on katanas along with rectifiers causing a parasitic drain with key off but cool glad you fixed your problem bro from Delaware
Had the same problem with the same bike, had to shoot it with starting fluid in the hole under the gas tank, then after warmed up, good all day. 2nd changed the choke cable then good. Hope this helps
Check the pulse generator coil on the right side of the bike underneath the smaller case, not the clutch but the other I had the same problem and that was the problem, got fixed and back running
i have the same problem in my 2000 gsx 750f check the valve clearance when it cold int 0.15 ex 0.25 by European measure mm not inch or change signal generator or the 2 coil end check your harness for short or cut may fix your problem the idle I don't now how
So.. the issue was the carbs. They got cleaned and it all worked really well :) Bike has been running fine for a while now. I have also only been using ethanol free gas.
Check the wires going to the coils , just between motor and the gas tank, because of heat , they may Parrish and possibly be small break in the wires. Orange, red, black/white and one I don't remember color of. Also check for bad connections to coil
Thank you! We actually got the carbs cleaned .. that did the trick :) Its been running for a good while now. I only use ethanol free gas and its been running super fine! Thanks for the tips and input - will keep that in mind for the future!
You said you went through the tank. Did you take apart and clean (or replace) the fuel tank valve. The valve works on a vacuum. Also make sure the tank breather tube is clean and clear...
I have a 1999 suzuki katana 600 that sat for 2 yrs. Had same problems as you. My problem was my peacock & the vacuume line from the right side of bike.
I love how people just start throwing out random things to check lmao butnits most likey the petcock,the floats,and or pilot jets as a few others have stated
you sure you cleaned the carbs out? im willing to bet your pilots are clogged, if it cant idle below 2000 without choke or throttle i BET you its the jets, stick a wire through all of them to see if they are clogged.
%100 is the carburetor, are the air screws adjust it at 4 turns, and line up the butterflys, i been fixing katanas for long time, you will see the difference
could you email me at dlara898@gmail.com and tell me what i need to do to fix my katana 750 2006 my idle is high and my katana doesn't want to start at times it's weird and then i sit there tryna choke it and start it until the battery drains
@Daniel Lara i have a quick question as well i have a 2000 katana 600 it struggles w cold start no matter the te.lmp outside had brand new battery at that soons as i jump it it runs fine all day long shit off and turn back on idk what it could be cant figure it out
OK HERE EXACTLY WHAT IS GOING ON WITH YOUR BYKE. 1- THE CHAMBER OF THE FUELS INSIDE THE CARBORATORS ARE OVERFILLED WITH GAS DUE TO THE FACT THE PUMPS AND FLOATERS ARE NOT SET CORRECTLY, THE CARBORATOR FLOADS THE FUEL TO THE AIR FILTER WHICH IS NOT GOOD AT ALL. WHEN THIS HAPPENS WITH ME I JUST TURN TO RES ND WAIT ALITTLE BIT THEN TRY TO TURN IT ON . BELLOW LINK WILL EXPLAIN WHAT EXACTLY YOU NEED. ua-cam.com/video/g6y32Gw5HK4/v-deo.html 2. I SUGGEST YOU GO BACK TO THE MECHANIC TO TUNE THE AMMOUNT OF FUEL SHOULD BE GOING INSIDE CARBORATOR CHAMBER AND W\ALL YOUR PROBLEMS WILL BE DONE. PS. I NOTEST THAT YOU ARE CLOSING THE BLACK PIPE THAT SHOULD NOT BE BLOCKED CUZ IF THERE IS FLOAD OF FUEL IN AIR FILTER THAT PIPE WILL LET IT OUT TO THE GROUND.
@@mdspaghetti4949 the carb kits have new gaskets, jets, and other parts that can wear out with time. So, they help the carburetors perform like they are supposed to. I would recommend looking at a carb kit on ebay or something and have your local dealership work on them.. may be a bit pricey because its 4 carburetors.. but if you have the time and patience, you can do that yourself..
@@winebikediy what jet’s specifically came with the kit that you got? I know there is like 6 different jets in each carb but everywhere I look the kits come with 2 or 3 jets and the gaskets
Hi, It could be a fault with your petcock. In the On position, it requires a vacuum to allow fuel to flow to the carbs. If you have a leak in the tube from Carb 4, then you wont' get the vacuum, and the the fuel wont flow. Turn the petcock to Pri. That bypasses the petcock vacuum valve and will allow the float bowls to fill with fuel. Try that first. It could be lots of things, so can work through each of them. Also, try using some choke, as this allows fuel into the carbs through a separate route from the pilot jets. My guess is your pilot jets are blocked. Working through different things, we can start to narrow the issue. Also, if you're on Facebook, there's a group called GSXF Owners Club. Lots of good advice there.
Thanks!! So - this was a while back... we actually solved the issue.. it was all related to the carbs.. I only had the carbs cleaned, but never rebuilt.. so got a carb kit.. took it to the shop.. had them rebuilt.. worked perfectly.. One thing I learned about these Katanas is that they are extremely cold natured.. so.. you gotta let it warm up a lot before it works properly.. Thanks for your input!!
So - Long story short.. It was just a carb issue.. It needed to be professionally cleaned and tuned. I still have the bike and its been running perfectly!
I have a 99 Katana with similar issues and am working on it now. Maybe I'll post a video if I solve it. Mine was sitting for five years so I -replaced battery -added gas -changed oil -checked drainage lines -sprayed carb cleaner direct into carbs while running It would run very roughly with starter fluid but would die fast. Turned out it was running on three cylinders because one spark plug wasn't connected. It ran louder but still had issues with four cylinders. Turns out there was a few maybe 1/4 cup of water and a lot of rust in the tank. -drained tank, added fresh gas and some Seafoam -put in new fuel filter -cleaned the carbs including a small wire, I was surprised how clean the carbs already were. I hope I cleaned everything and noticed all jets/screws were tightened all the way which I figure is stock NOw takes a few cranks to start or it starts up when a little warm and half choke. After five minutes on idle the RPMs go way up so I take off the choke. Runs another five minutes then just dies and I can smell gas flooding somewhere. Does not start again until cooled off.
I have the same issue, it'll start with help from starter fluid, but bog out like 5 minutes into a ride. Please report back if you figure out the culprit!
Seems to run like normal now although I haven't driven it more than a mile. Would start after priming then set it to on position, let it idle until it died or 30 minutes. Did this three times three days in a row. Now starts normally in On position, no gas smell, and runs like normal. I did put seafoam in the gas tank but I heard there is better stuff.
As the engine heats up, the valve clearance gets smaller, which holds the exhaust valve from closing completely. Check each valve at TDC on the compression stroke for the proper clearance. Basically you should be able to wiggle the rocker if there's clearance. If not, that is your problem. Valve won't completely close, so no compression. Problem gets worse as it get hot and metal expands. No compression, won't run.
If you have fuel going into your air cleaner box you have a float that is getting stuck and letting fuel run back up into the air cleaner box which then turns and runs into the motor and it hydro locks. If you had the carbs cleaned recently then one of your Tang's got pushed in which is letting the fuel leak
On that suzuki the fuel petcock is vacuum operated it is bad and running gas check the oil for gas it will wash the bearings thats why the air box is full of gas
You need to pull the clutch in to start it
that also dont buy a katana or any bike unless u know the basics
I know its an old video but this might help someone. You have 2 issues. Your float is stuck open and your petcock needs to be rebuilt. The petcock is leaking and filling your float bowl. To check, pull the line going to the side of your petcock with the valve in the on position. If fuel keeps dripping fromthe petcock, it needs rebuilding.
Thanks Brandon! I will actually pick the bike back again and work on it this coming month! I will try to rebuild the carbs and get a new petcock.. lets see what happens! Ill let you know!
@@winebikediy awesome man. I just did this on my 2003 and it worked great. I purchased the petcock rebuild kit and the carb kit both from K&L Supply. Everything fit like OEM. Good luck man!
Check your ignition coils....on a Kat they are mounted on the top of the valve cover....electronic parts don't like heat and act up when heated...if it was seriously flooded it wouldn't crank that nicely....I have had gas fill a cylinder on my katana once due to bad float needles...and after it cleared out the raw fuel it still started and ran ok...I'm betting it's your ignition system
Change the kick starter,that is the problem
The petcock it's the problem
You are out of gas you have to turn the knob to reserve.
Hello @punta Cana Biker! I actually had gas.. it showed I didnt, but I had some left still..
But I will fill the tank and still try to run it.. Ill let you know how it goes! thanks for the tip!
I have an 04/ 750 with a similar issue , idle problem ! Mine starts fine , runs good, but sometimes wants to die at idle or rev really high at idle. I have put about 2-3 months into my carbs and I still have the issue. Curious if you solved the issue and how you did it. Happy to chat sometime if you like.
Hey man, never got to fix that.. Hopefully ill touch back on it this summer.. Ill let you know how it goes!
Adjust the floats 13mm is factory setting
hi I have one that's doing the same thing Ben said when it's hot and it will not run so if you find out what it is please put it on UA-cam so all of us enough
I still havent figured out.. honestly I havent put much effort to it recently.. I will tho, hopefully this fall
I have 02 katana 600 with the same problem. Any ideas on how to fix? Any help appreciated
@@captainkilljoy7295 Your carburator is leaking by fuel via the needle seat brass seats. The brass where needle goes into has an o-ring that is worn out.It is leaking gas through. Thereby overfilling the gas bowl. It is a 5mm o ring you can purchase from NAPA. Ensure it is a viton rated for fuel use.
I have a 1998 and it was the fuel line. Clear the fuel line 😁
I got mine to stay running. I losened the carbs. Turned them upside down then tightened the fuel air adjustment screws down all the way but not tight. Then I screwed them out 2.5 full turns.
Scott Maddox I also have 89 750 katana. Riding it yesterday bogged on me pulled choke no change do pulled clutch in revved it tried to let it come to idle just died. Started right back up turned around started out normalish little down on power but was cruising at 65 then just died. No start no slight start just dry cranks. Can't figure it out... Any similar issues with yours? I can't find anyone with this year and CC.
@@4g63tpowered outa gas...switchoff?
@@marcokubuo8632 mine was a bad stator and valves out of adjustment
@@4g63tpowered cool I'm 2002 Katana 600 we took a trip through the guardrail going 60 on May 8th going to fast sharp corner Wentz wife guard rail on right something told me to put my right knee on the seat where would have been mangled so I went over the guardrail into the grass 30 days of healing but the bike hitch slightly right and slammed into the pavement and stated maybe 15 feet hopefully I slowed to maybe 35 by impact I believe I was in 3rd or 4th gear cosmetic damage it appears I hope she still runs I'm just now healed I haven't tried starting the bike I'm scared my baby dead but I'm hoping she's the tank and fires right up I should know in a day or two Staters seemed to be a common problem on katanas along with rectifiers causing a parasitic drain with key off but cool glad you fixed your problem bro from Delaware
Why do the manual say 1.7/8 turns
Mine is doing the same thing itll fire up eun and idle until its hot then wont start at all until its back cold again
Had the same problem with the same bike, had to shoot it with starting fluid in the hole under the gas tank, then after warmed up, good all day. 2nd changed the choke cable then good. Hope this helps
What kind of starting fluid did you use?
Check the pulse generator coil on the right side of the bike underneath the smaller case, not the clutch but the other I had the same problem and that was the problem, got fixed and back running
600 cylinders...!? Good luck checking valves on that many!
i have the same problem in my 2000 gsx 750f check the valve clearance when it cold int 0.15 ex 0.25 by European measure mm not inch or change signal generator or the 2 coil end check your harness for short or cut may fix your problem the idle I don't now how
So.. the issue was the carbs. They got cleaned and it all worked really well :) Bike has been running fine for a while now. I have also only been using ethanol free gas.
I have same problem with my suzuki gs 450 it's very hot and loose the power , yes i have problems with the petcock but I'm not sure what goes on ?
Check the wires going to the coils , just between motor and the gas tank, because of heat , they may Parrish and possibly be small break in the wires. Orange, red, black/white and one I don't remember color of. Also check for bad connections to coil
Thank you! We actually got the carbs cleaned .. that did the trick :) Its been running for a good while now. I only use ethanol free gas and its been running super fine!
Thanks for the tips and input - will keep that in mind for the future!
Make sure the fuel switch is on run and not on off
You said you went through the tank. Did you take apart and clean (or replace) the fuel tank valve. The valve works on a vacuum. Also make sure the tank breather tube is clean and clear...
I did go through the tank.. cleaned the rust from it.. I also had to work on the petcock if I remember correctly.. its been a while haha
I have a 1999 suzuki katana 600 that sat for 2 yrs. Had same problems as you. My problem was my peacock & the vacuume line from the right side of bike.
Yeah.. for me it was also the carbs..
lol nice video ...did u find the issue why it wouldn't stay on and side note if u had 600 cylinders you wouldn't need to worry about anything mane .
It was the carb... haha yeah, English is not my first language and I tend to mix up words haha
and turn ur idle screw down
Fuels not getting to the petcock
I love how people just start throwing out random things to check lmao butnits most likey the petcock,the floats,and or pilot jets as a few others have stated
It ended up being the carbs...
@@winebikediydo you know exactly what the issue was in the carbs did you just clean them and it ran fine having a similar issue driving me nuts 😂
you sure you cleaned the carbs out? im willing to bet your pilots are clogged, if it cant idle below 2000 without choke or throttle i BET you its the jets, stick a wire through all of them to see if they are clogged.
I have the same problem it turns of when it is hot, and won’t start when it cools down
%100 is the carburetor, are the air screws adjust it at 4 turns, and line up the butterflys, i been fixing katanas for long time, you will see the difference
could you email me at dlara898@gmail.com and tell me what i need to do to fix my katana 750 2006 my idle is high and my katana doesn't want to start at times it's weird and then i sit there tryna choke it and start it until the battery drains
@@iamdaniellara sure, send any question to my e-mail
Amadeo_mejia@hotmail.com I will help you, hablo español
@@iamdaniellara daniel e buscado tu e-mail y no le veo en mi bandeja de entrada, espero tu motp este bien
@Daniel Lara i have a quick question as well i have a 2000 katana 600 it struggles w cold start no matter the te.lmp outside had brand new battery at that soons as i jump it it runs fine all day long shit off and turn back on idk what it could be cant figure it out
Ever get it fixed? Mine is doing the same thing.
Not yet.. :/ I ended up getting another bike so I haven't really played with the Katana. I will try sometime soon.
pickup coils bro .
OK HERE EXACTLY WHAT IS GOING ON WITH YOUR BYKE.
1- THE CHAMBER OF THE FUELS INSIDE THE CARBORATORS ARE OVERFILLED WITH GAS DUE TO THE FACT THE PUMPS AND FLOATERS ARE NOT SET CORRECTLY, THE CARBORATOR FLOADS THE FUEL TO THE AIR FILTER WHICH IS NOT GOOD AT ALL. WHEN THIS HAPPENS WITH ME I JUST TURN TO RES ND WAIT ALITTLE BIT THEN TRY TO TURN IT ON . BELLOW LINK WILL EXPLAIN WHAT EXACTLY YOU NEED.
ua-cam.com/video/g6y32Gw5HK4/v-deo.html
2. I SUGGEST YOU GO BACK TO THE MECHANIC TO TUNE THE AMMOUNT OF FUEL SHOULD BE GOING INSIDE CARBORATOR CHAMBER AND W\ALL YOUR PROBLEMS WILL BE DONE.
PS. I NOTEST THAT YOU ARE CLOSING THE BLACK PIPE THAT SHOULD NOT BE BLOCKED CUZ IF THERE IS FLOAD OF FUEL IN AIR FILTER THAT PIPE WILL LET IT OUT TO THE GROUND.
Thank you!! I will work on it sometime this month and I will get back to you with results!
My 2000 Katana is doing the same. This definitely sounds like what the problem is.
magshoor bakh?
What was the problem?
Carbs...
I should mention I have a 89 katana 750
Scott Maddox how is fuel tank routed?
Carburetor and pectkoc problems .if you carburetor feil your pectkot suppose to cut the fuel off
Dealing with the same problem at the moment. Any chance you figured out what it was?
I actually did! new petcock at ebay + new carb kit did the trick! its running great!
@@winebikediy What did the carb kit replace? Mine is doing the same thing
@@mdspaghetti4949 the carb kits have new gaskets, jets, and other parts that can wear out with time. So, they help the carburetors perform like they are supposed to. I would recommend looking at a carb kit on ebay or something and have your local dealership work on them.. may be a bit pricey because its 4 carburetors.. but if you have the time and patience, you can do that yourself..
Thats what I did.. We got a carb kit and our dealership cleaned and re-built them. Bike works just fine now!
@@winebikediy what jet’s specifically came with the kit that you got? I know there is like 6 different jets in each carb but everywhere I look the kits come with 2 or 3 jets and the gaskets
You ever find out what was wrong with your bike
Not yet.. :/ I haven't paid much attention to it after I got my new one.. but Ill be working on it again next month.
Caltric stator Pick up coil signal
Mine is doing the same thing
Hi, It could be a fault with your petcock. In the On position, it requires a vacuum to allow fuel to flow to the carbs. If you have a leak in the tube from Carb 4, then you wont' get the vacuum, and the the fuel wont flow. Turn the petcock to Pri. That bypasses the petcock vacuum valve and will allow the float bowls to fill with fuel. Try that first.
It could be lots of things, so can work through each of them.
Also, try using some choke, as this allows fuel into the carbs through a separate route from the pilot jets.
My guess is your pilot jets are blocked. Working through different things, we can start to narrow the issue.
Also, if you're on Facebook, there's a group called GSXF Owners Club. Lots of good advice there.
Thanks!! So - this was a while back... we actually solved the issue.. it was all related to the carbs.. I only had the carbs cleaned, but never rebuilt.. so got a carb kit.. took it to the shop.. had them rebuilt.. worked perfectly.. One thing I learned about these Katanas is that they are extremely cold natured.. so.. you gotta let it warm up a lot before it works properly..
Thanks for your input!!
CDI
I have same problem on my 2003 Hornet 600 :/
started with starting fluid just spray into a air filter
Out of gas
Kickstand
Sensor
Kickstand sensor
So - Long story short.. It was just a carb issue.. It needed to be professionally cleaned and tuned. I still have the bike and its been running perfectly!
Do you know how many turn out the pilot air screw mixture ?
Man, I wish I did.. but I dont.. You might be able to find a pdf version of the katana service manual online.. They should have that info there..
A bit late but screw it all the way in, and then back it out exactly 2 1/2 times
Needs valve adjustment.
B
have you find what is wrong?
Yup! Needed a new petcock (the other one was flooding things) and it needed the carbs redone with a new carb kit. Its now running amazing!
look above for Raven Quinn she has good advice its four comment's up from here she has good common scene
looks like a petcock problem, did you fix it?
I have a 99 Katana with similar issues and am working on it now. Maybe I'll post a video if I solve it. Mine was sitting for five years so I
-replaced battery
-added gas
-changed oil
-checked drainage lines
-sprayed carb cleaner direct into carbs while running
It would run very roughly with starter fluid but would die fast. Turned out it was running on three cylinders because one spark plug wasn't connected. It ran louder but still had issues with four cylinders. Turns out there was a few maybe 1/4 cup of water and a lot of rust in the tank.
-drained tank, added fresh gas and some Seafoam
-put in new fuel filter
-cleaned the carbs including a small wire, I was surprised how clean the carbs already were. I hope I cleaned everything and noticed all jets/screws were tightened all the way which I figure is stock
NOw takes a few cranks to start or it starts up when a little warm and half choke. After five minutes on idle the RPMs go way up so I take off the choke. Runs another five minutes then just dies and I can smell gas flooding somewhere. Does not start again until cooled off.
I have the same issue, it'll start with help from starter fluid, but bog out like 5 minutes into a ride. Please report back if you figure out the culprit!
Seems to run like normal now although I haven't driven it more than a mile. Would start after priming then set it to on position, let it idle until it died or 30 minutes. Did this three times three days in a row. Now starts normally in On position, no gas smell, and runs like normal. I did put seafoam in the gas tank but I heard there is better stuff.
@@ChromoFed what's beatter then seafoam?
Change your oil filter
Check fuel pump
carbureted bikes do use fuel pumps
the engine is to Hot to start. have to find something to cool down the oil system. like if the vent is working. had them problemas in my 93 katana.
Jets and inlets may have reclogged in carburetor. Had to clean mine a few times to get it goin because debris in the lines break free and reclog.
It is the pick up coil
fuel sensor or air sensor. i have a 03 model
aha! Interesting.. would you recommend to change those? - any tips on where I can find them?