• 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.

Intermediate loss of power

  • Thread starter Thread starter GBABOB
  • Start date Start date
G

GBABOB

Guest
[FONT=&quot]Hi, My son recently bought an 81? GS650G. We are new to Suzuki?s and motorcycles in general. I have found a wealth of knowage on this site. When we bought the bike the carbs where leaking fuel into the airbox so we pulled them off and took them to a mechanic and he cleaned and bench flowed them. We reinstalled the carbs and found it would run ok but had no power. After some investigation we discovered that the intake boots where shot. We replaced the boots and o-rings with new ones. We have also replaced the airfilter. Now it has the loss of power on a intermediate basis, sometimes it runs like a scalded ape other times it can?t get out of it?s own way. Where should we look next? Thanks[/FONT]
 
Check fuel flow from the petcock. This is a part that should just be replaced to insure good fuel flow.
 
I think the petcock is working semi-well fuel seems to flow ok when it's in the prime position but the engine doesn't run differently with the petcock in any of it's positions. The petcock does get wet with gas when you turn the valve stem. If petcock wasn't working wouldn't you at least a small burst of power from the fuel in the float bowels before they where starved from the lack of fuel from the petcock?
 
In my experience a bad petcock will show intermediate issues.
The problems really show up at highway speeds where there is more need of fuel.

If you are certain this is not the issue than check the vent lines off the carbs and the vent in the fuel cap.

If these aren't the issue move to ignition.
 
I think the petcock is working semi-well fuel seems to flow ok when it's in the prime position but the engine doesn't run differently with the petcock in any of it's positions. The petcock does get wet with gas when you turn the valve stem. If petcock wasn't working wouldn't you at least a small burst of power from the fuel in the float bowels before they where starved from the lack of fuel from the petcock?
 
Bad petcocks do not flow fuel consistently. This would cause bursts of power and no power periods.
Bad venting will also cause poor power.
So will weak coils
Bad connections and/or low voltage at the coils and ignition
Bad battery
Bad coils at the crank trigger
Poor grounds
Low compression
Poor sealing valves
Worn out cam chain
Bad spark plugs
Dirty carbs
 
i had to replace plugs and wires to fix a weird intermitant problem with power.. i second checking those. (and of course everything else chef says, he's a guru!)
 
seuadr said:
i had to replace plugs and wires to fix a weird intermitant problem with power.. i second checking those. (and of course everything else chef says, he's a guru!)
Click to expand...
I'm no guru. I'm humbled by the guys at the Dragstrip. Check out some of Lecroy (Mark's) posts. He's a guru.
I was just trying to figure why the same post was posted twice. Didn't like what was said? I almost went somewhere I'd regret but you can't really tell peoples intentions on the net.
 
You must log in or register to reply here.
Back
Top