• 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.

cutting out and dying

  • Thread starter Thread starter gs850cafe
  • Start date Start date
G

gs850cafe

Guest
when bike is warm it cuts out like its out of fuel...and dies at hen the clutch is in...but sometimes it runs just fine...

down the highway is a noticable dead spot..like it runs on 3 cyl

course the carbs been dipped synced, valves adjusted and so on...any ideas?

bike is bone stock 81 850

is it possible the "in check" valves are now worn?...can carbs come unsynced within 500 miles? spark plugs bad? im kinda clueless why its acting stupid...it ran great for about 400-500 miles then acted up yesterday
 
Last edited:
gs850cafe said:
when bike is warm it cuts out like its out of fuel...and dies at hen the clutch is in...but sometimes it runs just fine...

is it possible the "in check" valves are now worn?...can carbs come unsynced within 500 miles? spark plugs bad? im kinda clueless why its acting stupid...it ran great for about 400-500 miles then acted up yesterday
Click to expand...
" "in check" valves are now worn" ??? likely , whatever they are!
Anyways, since "it ran great.... then acted up yesterday" , maybe you picked up a tank of bad gas. No inline fuel filter? try new stuff, maybe with Seafoam dose.
 
When did this set of symptoms occur?
1) Did this all start immediately after you rebuilt the carbs?
2) Was it the problem that made you rebuild the carbs in the first place?
3) Or was the bike running fine after you rebuilt the carbs and it is a new problem?

If it's carb related, it might be dirt in one or more of your carbs that has travelled down from your tank. Any rust in your tank? This could affect fuel level in the float bowls by holding the valve open (what you called "check valve"?) or be intermittently blocking a fuel jet.

I'm also thinking it could be an ignition problem, perhaps a loose wire from your points, pickups, or ignitor, a lead to your coils, or a failing coil, failing high-tension lead (spark plug wire) even a bad electrical contact or fuse. I guess what I'm saying is check through the electrical system associated with the ignition system and see if you find anything. Maybe start by pulling all four spark plugs and see if any of them are darker or wetter than the others. Coils sometimes work fine when cold, but then fail as they heat up from the engine.
 
started about 400 miles after rebuild of carbs...carb were just dirty to begine with..

took float bowl off...found brown sediments in every bowl...carb 2 being worst...

well i think i know the problem..guess i didnt clean tank good enough...
 
An inline fuel filter might be a good idea, since that will work better than the tiny screens over your fuel-level valve inside the carbs.

I would still pull the spark plugs before pulling the carbs to give them another cleaning. Pulling the plugs for a quick check is really easy and you don't even need to pull the fuel tank first.
 
Last edited:
Ajay said:
An inline fuel filter might be a good idea, since that will work better than the tiny screens over your fuel-level valve inside the carbs.

I would still pull the spark plugs before pulling the carbs to give them another cleaning. Pulling the plugs for a quick check is really easy and you don't even need to pull the fuel tank first.
Click to expand...

i have an inline filter as well..forgot to add that cleaned plugs too
 
I has a similar problem, There was a chunk of crap and it was behind the float needle seat, it took me a while to find it, then I had a inline fuel filter and it would kink the fuel line when I was going down the road it felt like it was running out of gas.
 
kdo58 said:
I has a similar problem, There was a chunk of crap and it was behind the float needle seat, it took me a while to find it, then I had a inline fuel filter and it would kink the fuel line when I was going down the road it felt like it was running out of gas.
Click to expand...

well i didnt spray carb cleaner up there yet...i just inspected it for a sticking needle..

i also took it out...it does this cold too...then after a jerky bumpy ride i opened it up...was i riding a bull?

also in netrual say you hold 4k rpm..it backfires at a steady rate..im wondering if its time to recheck valves
 
Last edited:
Unless you really think you messed up the valves, there is nothing here that indicates that valve adjustment is the problem. Even if you did them too tight, wound the **** out of it and bent a valve, that would usually just put you down on power unless you actually broke the valve.

Check the simple stuff first, before you start worrying yourself to death! :)
 
You must log in or register to reply here.
Back
Top