• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Popping when starting up.

  • Thread starter Thread starter tyhillert91
  • Start date Start date
T

tyhillert91

Guest
Hello,

When i try to starup my bike, it doesn't seem to get any fuel, and when it does it misfires and makes a loud pop in one of the combustion chambers.

I recently cleaned and put in replacement parts for all the carbs.

Before i did this it ran clean but leaked fuel because of a bad float.

The pilot jets i screwed in about three turns in so they would be able to suck up the fuel, could i have raised them too high? or could it be something else?
 
Popping is usually too much fuel igniting on the wasted spark stroke.
Is your valve clearance in spec?
 
valve clearance should be fine, i didn't mess with the valves.
 
what it does in more detail, engine will crank, but it wont sound like its igniting fuel, and every few seconds it pops like i said.
 
Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr. tyhillert91,

The aftermarket "carb kits" almost always contain inferior parts and can be detrimental to your carb health. It's best to re-use all of the original stock parts (replacing only what's necessary with Suzuki OEM parts), clean the carbs properly, and replace the internal rubber O-rings with a kit from our friend Robert Barr at http://cycleorings.com as you reassemble the carbs. You'll find more about this and the other critical maintenance your bike needs in your "mega-welcome".

Anyway, let me dump a TON of information on you and share some GS lovin'. :D

I just stopped by to welcome you to the forum in my own, special way.
big_hi.gif


If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....
hat1.gif


Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Cleanup Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. This is what NOT to do: Top 10 Newbie Mistakes. Now let me roll out the welcome mat for you...

carpet.jpg


Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike! :D

Thanks for joining us. Keep us informed. I will put you on my prayer list.

Thank you for your indulgence,

BassCliff
 
Hi,

tyhillert91 said:
valve clearance should be fine, i didn't mess with the valves.
Click to expand...

Just because you "didn't mess" with them doesn't mean that they are in spec. Check the valve clearances. This is one of the critical maintenance tasks listed in your "mega-welcome" maintenance lists. Your bike will love you for it.

You have a 30 year old motorcycle that has probably been neglected at best, abused at worst. It needs some TLC.


Thank you for your indulgence,

BassCliff
 
Cliff already said it but you can't just not mess with the valves and think they'll be okay. I learned that lesson last year, fortunately not through the hard way, and my bike has loved me ever since. Take the time and go through all the maintenance or you'll have many more problems.
 
tyhillert91 said:
Before i did this it ran clean but leaked fuel because of a bad float.

The pilot jets i screwed in about three turns in so they would be able to suck up the fuel, could i have raised them too high? or could it be something else?
Click to expand...

What Carb are you running and what kind of bike is this on?

Few things to check:

Floats Could be to high/low (they may need to be adjusted.. but I can't give you the specs without knowing the kind of bike/carb you have)

Pilot Jets (Again without knowing the Bike/Carb can't give you specs on this either)

To me this sounds like the pistons are loading up with fuel and only firing on certain cylinders soooo check your plugs... you may have fouled plugs from to much fuel getting into the cylinders which in turn still means your getting to much fuel from the Carbs into the cylinders which would still need to be addressed once you have known good spark plugs.

Petcock functioning properly? Fuel flowing from Primary, stops on Off etc....
 
Im running it on BS33 Mikuni Carbs, the bike is a 1981 gs550L
 
quite right you are good sir!
BS32SS is correct!

have a cookie
 
ive deduced a few problems from the posts ill try some fixes tomorrow.
ill keep you all posted thanks for the advice!
 
I'm with Tom on this one, incorrect spark plug - HT lead orientation, way off ignition timing or messed up valve timing/gaps.

Check the easy ones (HT leads) first!

Good luck!
 
ive found a problem!
Two of the spark plug wires were mixed up.

now it starts with the throttle fully open, has a very low idle, and then dies.

im looking at the spark plugs and theyre wet. not oil wet but gas wet. that means an incorrect mixture correct?
 
It means you tried to start it with the throttle wide open.
Use the choke only.
 
don't do what I did. Check your idle screw on the bottom of the carbs in between carb 2-3 and screw it all the way out and when it berely touches the plate then go 2-3 full turns in. try that then make adjustments to the screw once it starts
 
Tenrilid said:
don't do what I did. Check your idle screw on the bottom of the carbs in between carb 2-3 and screw it all the way out and when it berely touches the plate then go 2-3 full turns in. try that then make adjustments to the screw once it starts
Click to expand...


what did you do out of curiosity?
 
tyhillert91 said:
what did you do out of curiosity?
Click to expand...
Probably discovered that his idle stop screw was holding throttle plates too open which tends to complicate cold starts. Since you probably can't see plate position without removing stuff, best to check by backing off screw and then going back in 2 - 3 turns. As chef said, just use "choke" no throttle input.
 
You must log in or register to reply here.
Back
Top