• 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.

It's (almost) alive!

  • Thread starter Thread starter robsGS850
  • Start date Start date
R

robsGS850

Guest
Hi all, guess this one's more of a methodology question:

Over the winter i dove in way over my head and did a ton of work: new .05mm pistons, rebored barrels, rebuilt the carbs (aftermarket kits, still have the OEM parts), sealed my tank, new petcock, even brand new paintjob and correct stock exhaust system.

Finally finished assembling the whole thing bike night, fired it up on a whim (figuring it's going to take a lot of tweaks to get it right), and miraculously it started right up, no holed pistons or anything.

It revs to the ceiling on full choke, runs for a minute or two, then eventually dies out, no matter what i do with the throttle.

Set the petcock to prime to eliminate one variable, but now what?

Guess my question is, what to try next? I want to balance the carbs and set the airscrews correct etc, but right now I just want the bike to keep running long enough to actually tune it.

Right now I've ruled out the new paint job, but I'm open to any theories.

sorry for the long post, hope this makes some kinda sense.

rob
 
Is your throttle cable stuck open? Make sure your butterflies are closed. There's no way it can 'rev to the ceiling' with them fully closed.
 
Last edited:
Yep the airbox is on, sealed up with the usual weatherstripping. Didn't service the air filter as it felt well-oiled, but now it's is on my list.

I checked the throttle cable, i had it a tiny bit too tight so I loosened it (pretty sure the butterflies were closed tho). THen unfortunately I had to stop and go vote in our provincial election! That darn democracy. Will take off the tank, rig up some kinda fuel line and start fiddling with the carbs tonight. Thanks for the suggestions.
 
Thanks for the help, finally got it to stay running (very very roughly ... my license plate has never made that much noise from vibration)

Do I need to adjust the valve shims because the +.05mm piston heart transplant?

bonus side question: anyone know the the recommended idle rpm? I've torn my manual apart looking for this, i thought it'd be a simple find. ah well.

thanks again,
rob
 
You didn't say how many miles have passed since the last valve adjust, but they should certainly not be overlooked.

The factory idle setting states: 1050 +/- 100 RPM.

Did you do a good bench sync before putting the carbs back on the bike??
 
Last edited:
You must log in or register to reply here.
Back
Top