• 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.

Motor seized up... Then released?!?!

  • Thread starter Thread starter jrubek
  • Start date Start date
J

jrubek

Guest
Hey folks,

Ok, I got the brake thing worked out. They are not perfect but they do work and are road worthy. I registered the bike today and took it for it's first open highway run... Yea, I had to walk it back home.

I'm going to start off by saying that I know the carbs are gunked up and it is REALLY hurting performance. I was hoping that running new gas through the carbs would get it running better. I hopped on the freeway (55 mph, 85 degrees) and went about 8 miles. When I took the freeway exit, I heard a lot clanking and some squealing as though it were out of oil. (BTW it does leak a lot of oil out the left side somewhere.) I stopped in a parking lot and bought some oil. I topped it with 1/4 quart of oil then dropped it when I brought it off the center stand. (Figures!)

On the ride back, I didn't hear anything above the wind noise but I couldn't get it to do over 50. When I took my home exit, I pulled in the clutch to downshift and it stalled. This happens with the funky carbs so I figured I would just drop it to 4th and pop start it. (still doing 45 mph here). It felt like I jammed on the brakes. I immediately pulled in the clutch, (now doing 20) I popped it down to third and tried pop starting again and the rear tire locked. I knew I was in trouble there.

I pulled to the side of the road and tried using the starter. The starter clicked hard but the motor didn't turn over at all. I walked the bike home 3/4ths of a mile. Several hours later, I tried it again and it fired up just fine. No problems at all... AAARGHHH!

Ok. I haven't checked the oil level again yet but I'm betting it is ok. My first thought for diagnosing this is to get a reading on the oil pressure. I just don't know how to do that. Do you folks have any ideas where I should go from here?

Thanks much

Jeff Goetz
1979 GS850
 
Last edited:
I would start by removing the cam cover & doing a visual inspection of the valves, Pull the plugs, remove the points cover on the right side Using a 17mm wrench try & turn the motor over. IF it will not turn ? slide the drive shaft boot back & unbolt the shaft try turning again Next I would remove the beveled drive gears Try turning the engine with the wrench again If it still won't turn start looking for another engine. I have a spare one you can have BUT Portland is too far for me
 
Last edited:
Did the engine seem too hot? Kind of sounds like ring seizure. See what the cams and shims look like.
2 stroke bikes can get it if they get too hot.Once they cool down they can start right up. In my 1000 manual it shows to put the oil pressure gauge down beside the oil window.
With cam cover off start the bike and make sure that you have oil getting onto the cams.
You could have a pluged oil gallery to the top end,but not sure how you would clean it. Maybe compressed air?
 
Last edited:
My friend use to have a yz80 dirtbike that had some pieces of sand in the crankcase. once and a blue moon the motor would lock up and you could take the cylinder of and see a piece of sand in between the crank and case which locked up the motor. so we would turn the engine backwards and the little piece would fall out of place and there you go, it ran again. something is probably getting hung up when the motor is hot and that shrinking when it cools off a bit.
 
Take a good look at the starter drive. I had one lock up once upon a time which caused the very large gear on the end of the crankshaft to drive the very small gear on the starter at engine RPM. It didn't take long to melt the starter into one solid piece, which caused the rear wheel to lock up. I grabbed the clutch and got it off the road. I hit the starter button and nothing happened but it bump-started immediately. I cautiously rode it home and tore it down to find the starter meltdown.

Thanks,
Joe
 
You must log in or register to reply here.
Back
Top