• 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.

78 gs 750 low fuel mileage

  • Thread starter Thread starter therealdunbar
  • Start date Start date
T

therealdunbar

Guest
I've been getting about 20 mph was wondering what the average was, i recently changed out the petcock due to fuel making it into my oil aswell as adjusted the floats to 23 mm from the top of the circular float . also there is a hole in the exhaust and 1+2 headers are hotter then 3+4 any insight would be appreciated
 
Last edited:
Not enough information to help you, is it a stock bike, intake and exhaust? Has all of the regular maintenance been addressed?
 
Here is his other thread...

http://www.thegsresources.com/_forum/showthread.php?t=195797


First off how are you measuring fuel economy? Measuring fuel economy on a motorcycle is more difficult to do than a car. You have to fill the tank to the exact same level each time and make sure other variables are taken into account such as if you had to change the front tire to a slightly larger diameter like I had to on my 300.

The pipes should temp about the same. The cold 3 and 4 pipes seem to point to a fueling issue... but could be the plugs or wires going to those cylinders. It could also be the wires might be switched. One coil goes to 1 and 4 the other 2 and 3. I would start by pulling the plugs out and check the level of fouling on all 4 cylinders. If the plugs are old now would be the time to start with a fresh set. A set of spark plugs can tell you a lot of things about the running condition of an engine.
 
You still got a vacuum petcock? connected to #3 carb? make sure it's not leaking gas down vac line and fouling #3 plug
 
I believe everything is stock except the exhaust and (4 into 2) I've replaced the air filter, oil filter, spark plugs and petcock. I've checked the points, compression, and synced the carbs sorry for the little amount of info im fairly new
 
Put your location in your profile. Maybe a GSR member is nearby to help you.
 
i picked up a new oem petcock recently and will be keeping an eye on the vaccum line, i will also be looking at the wires thank you for the ideas. i have discovered a small amount of fuel coming out of the overflow which leads me to believe i set the float hights incorrectly. im unsure of where to measure on the floats as they are circular, if anyone has any knowledge of these floats i would appreciate it
 
I think the manual calls for Float Height to be 25-27mm.
If you're set lower than that, you're running way rich.
 
You must log in or register to reply here.
Back
Top