• 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.

VM 28 Carbs idle issues.

  • Thread starter Thread starter Octane80
  • Start date Start date
O

Octane80

Guest
Hey guys I have a 77 gs750 with pods, 4-1 and vm28 carbs from a mid 70's kz. I have thoroughly cleaned the carbs and blasted all the orifices with cleaner along with replacing boot rings and all o-rings within the carbs. I have also rebuilt the petcock and fuel flows fine from it. The engine has two idle points, I can start it and get it set at 1100 ish but after a little riding it will rise to up around 2000 and hang there. Sometimes it comes back down and other times it just sits at 2k. The bike also has dyna S ignition and I just set the timing according to the manual. The motor runs pretty good and really the only issue I've noticed is a bit of bog when you crack the throttle, but that appears to be normal for the bike. I've also synced the carbs, and the last thing I have left on the list is to check the valves. Could this be due to bad valve clearance? The motor has 16000 miles and it sat a good deal before I purchased it and did the rebuild. I also have checked the plugs and they seem to be a decent color, maybe a tad rich but not to the point I would have to worry about fouling. The only other issue I've noticed is during choke the engine runs super rich to the point that the exhaust is sooty. Thanks in advance for your help!
 
Hi,

Sticky cables? Still a little lean? Have you done plug chops?


Thank you for your indulgence,

BassCliff
 
Thanks BassCliff for the reply! I figured out the idle issue and it ended up that the throttle pull cable was being kept at a weird angle in the perch and was binding a bit because of it.

However, now I have a new issue which is consistent and began just recently. Upon acceleration the engine begins to miss a bit at 5k rpms, I've checked spark on all the plugs and I'm getting a good blue spark on all cylinders. I also have replaced plugs and checked for air leaks. Coil voltage stays over 13.5 volts and gas is flowing fine.

I did notice that a couple of the plug wires were getting some cracks in them and put my hand up to them to see if I would get zapped but did not. Could it be the plug wires? I'm low on cash so I'm trying to avoid replacing the coil plug units, has anyone tried to replace the plug wires? I assume that since the coils appear to be potted this would not be doable, but it's worth asking I guess.
 
You must log in or register to reply here.
Back
Top