• 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.

1980 1000G Starting troubles

  • Thread starter Thread starter Izukes
  • Start date Start date
I

Izukes

Guest
Working on my project bike and can't get it to fire. Driving me nuts!! It has run since the rebuild, but now will not start. It spins well. I have checked the ignition timing and the static timing is good. It has fire to the plugs and fuel to the carbs. I'm going to check the cam timing next, although I triple checked that before I buttoned up the valve cover. If there are any ideas out there, I'd appreciate it. I've done the following work and tests:
Wiseco 1085 Kit
Fresh valve job- Compression running 90psi in all four cylinders
APE mechanical cam chain tensioner
34 CV Carb rebuild-fuel getting to the bowls, mechanicals move smoothly, chokes working, no stuck floats
Dyna S Ignition- getting fire properly and statically timed correctly (tried with stock electronic ignition, same result)
Accel Coils- Proper ohms from coils, proper voltage through wires and spark to the plugs
Yuasa sealed battery
New starter
New starter solenoid
new igniter
 
Definitely check the cam timing. Why is your compression so low, it should be 120 or higher, especially after a rebuild. If you put where you are, there might be a member close by that could help out.
 
I live in San Juan Bautista, Ca near Gilroy. I'm thinking the cam timing might be out and causing the lower compression.... Hoping to work on it today if life permits.
 
azr said:
Definitely check the cam timing. Why is your compression so low, it should be 120 or higher, especially after a rebuild. If you put where you are, there might be a member close by that could help out.
Click to expand...

As little as I know about these, this is correct. Even at 120, that is way low. According to what I've read, that would be at the rebuild point. My lowest one on a stock bike was 170.
 
Well, I'm wondering the same thing now. The cam timing is correct and I still get 90psi. I installed the new pistons and rings correctly, and torqued the head properly. I'm open to suggestions.... If anyone lives near Gilroy, let me know and we can connect. I'm very frustrated!
 
Are you sure you're doing the compression check properly? you have the throttle wide open when you're cranking?
 
Sounds like the rings are "washed down" with fuel. If you flood a cylinder with gas, the compression drops way off. Pull the plugs out and crank the motor over for at least 20 seconds. Put brand new plugs in it and retry........Billy
 
That sounds reasonable, I'll try it. Better than pulling the motor apart. The engine is a new rebuild and hasn't been run more than about two minutes....
 
Did you check the deck height after putting the barrels on?, a guy on gixxer had the pistons about .250 down the bore
on a rebuild
 
Ok, I cleared the cylinders and squirted a little oil into each. Brought the compression up to 130psi in each and I was able to get it to fire up! Yeehaw!. Thank you for the suggestions! Now just a matter of tuning as it is missing and spitting a bit....
 
Got it running, but the carbs act like the vacuum hats are leaking....
 
You must log in or register to reply here.
Back
Top