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bike is falling on its face

  • Thread starter Thread starter striker
  • Start date Start date
S

striker

Guest
well im back with other issues :D. went for a ride today after butting some parts in her (81 gs 850gl), wos running strong, rode for about 2-3mils and it started to fall on its face. turn the throttle loss of rps. wuld wont to start when choked but wuld stall. the only way i got it home wos to run it on prime. im going to pull the petcock and cleen. other input wuld be nice
 
that petcock looks just like the 1 on my bike. i think im going to take the bike to a shop and have them redo the carbs. i dont think they did it right the last time. i do think because i dont have the right tools for the job and this last batch of parts tap me out and this shop will let em pay when i can. i love small towns.
 
striker said:
i think im going to take the bike to a shop and have them redo the carbs. i dont think they did it right the last time.
Click to expand...

You think they will do it any better this time?
Learn to do this stuff yourself or buy a new bike.
 
striker said:
that petcock looks just like the 1 on my bike. i think im going to take the bike to a shop and have them redo the carbs. i dont think they did it right the last time. i do think because i dont have the right tools for the job and this last batch of parts tap me out and this shop will let em pay when i can. i love small towns.
Click to expand...
If the shop messed up the carbs the first time, what makes you think they will do them any better the second time around?

There are several members on this forum that will be happy to do your carbs for you.

You will get a better job and quite likely a far cheaper price.

I am one of those carb guys, let me know what you want done.

.
 
well the parts were, all used. 2 coils, igniter box and R/R. and i live in up state NY for those of u asking to rebuild the carbs for me. i wuld love to learn how to do this my self. like i sead i dont have the proper tools for a carb job. as for the shop i think the new coils and other parts have a lot to do with it not running perfect. i tend to be verry picky and a little OCD.
 
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striker said:
well the parts were, all used. 2 coils, igniter box and R/R. and i live in up state NY for those of u asking to rebuild the carbs for me. i wuld love to learn how to do this my self. like i sead i dont have the proper tools for a carb job. as for the shop i think the new coils and other parts have a lot to do with it not running perfect. i tend to be verry picky and a little OCD.
Click to expand...

Did you get a Megawelcome?

Read it

Carbs only require a few simple hand tools
 
i think i give up. eny 1 wont to buy a 81 gs 850gl, 15,000 mil now with a ticking in the engine?
 
striker said:
i think i give up. eny 1 wont to buy a 81 gs 850gl, 15,000 mil now with a ticking in the engine?
Click to expand...
15 k - it's barely broken in! You said..."wuld love to learn how to do this my self" so let's buckle up and get to it. Lots of help on here to guide you. Many folks new-to-carbs have done it and actually succeeded- no special tools, just follow the guidelines on here. Don't get intimidated,get inspired.
 
Welcome

Welcome

striker said:
well im back with other issues :D. went for a ride today after butting some parts in her (81 gs 850gl), wos running strong, rode for about 2-3mils and it started to fall on its face. turn the throttle loss of rps. wuld wont to start when choked but wuld stall. the only way i got it home wos to run it on prime. im going to pull the petcock and cleen. other input wuld be nice
Click to expand...

Wow, you did an intro back on Sep 15, 2012 and had 23 views with zero replies. You've started 7 threads but I didn't see your Mega Welcome.

Don't give up on your bike...I've yet to start my rebuild on my second "T" but I really want to learn how to take sections apart and put them back together as GSR members have done. Take a look at this website and get yourself educated on your bike.

http://members.dslextreme.com/users/bikecliff/

Good luck and don't give up!


EDIT: Post pictures of your bike!

Ed
 
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so i pulled out all the spark plugs to see wot the ticking wos. and i can see valves hanging down in 3 and 4 cylinders. #3 y can see just a tiny bit but a lot in #4. im pretty sheer that's a bad thing right????
 
striker said:
so i pulled out all the spark plugs to see wot the ticking wos. and i can see valves hanging down in 3 and 4 cylinders. #3 y can see just a tiny bit but a lot in #4. im pretty sheer that's a bad thing right????
Click to expand...

wrong, that is just because the valves are open. if you turn the engine over while still looking through the plug holes you will see them all moving up and down.
 
i thout that #1 and 4 fire at the same time and # 2 and 3 fire. so i shuld not see the valve on 3 if i see it on 4. i cant see valves in 1 and 2
 
Do a compression check or just put your finger over the spark plug hole and crank it. If the air does not get by your finger you have zero compression.
If your valves were hanging open you would have more than a tick.
 
striker said:
i thout that #1 and 4 fire at the same time and # 2 and 3 fire. so i shuld not see the valve on 3 if i see it on 4. i cant see valves in 1 and 2
Click to expand...
the sparks on 1&4 and 2&3 may spark at the same time but they dont fire at the same time, when #1 is up on the compression stroke(firing), both valves closed, #4 is up on the exhaust stroke, exhaust valve fully open. same as 2 & 3.
there is also a degree of valve overlap, where both valves will appear to be open at the same time,although 1 may be closing as the other is opening
 
striker said:
well im back with other issues :D. went for a ride today after butting some parts in her (81 gs 850gl), wos running strong, rode for about 2-3mils and it started to fall on its face. turn the throttle loss of rps. wuld wont to start when choked but wuld stall. the only way i got it home wos to run it on prime. im going to pull the petcock and cleen. other input wuld be nice
Click to expand...

I had a problem similar to that, the vacuum line to the petcock came off.
Check yours for loose connections, holes, kinks, etc.
 
Petcock

Petcock

sedelen said:
I had a problem similar to that, the vacuum line to the petcock came off.
Check yours for loose connections, holes, kinks, etc.
Click to expand...

Also check for 2-3mm cut on the edges of the vacuum hose. Mine caused a leak into the secondary airbox and down the resevoir. I cut the damaged portion and installed a spare fuel petcock and all is well again.



Ed
 
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The problems you describe in your first post sound like there's a massive air leak, causing the bike to run very lean as it warms up. Opening up the choke enriches the mixture and allows the engine to limp along as best it can. So your first order of business is finding that leak. Could be anywhere between the airbox snorkel and the intake side of the head.

There was some talk about the petcock, but unless you've tested it separately and know it to be bad, you're shooting in the dark, so to speak. The art of troubleshooting a problem like this is to eliminate each possible cause one-by-one until you've found the problem.

Of course, you have to start with a good baseline, which pretty much means doing all of the periodic maintenance found in the service manual. And of course, if you're a member here, you almost certainly already know about the near-bottomless pit of GS knowledge that is BassCliff's site: http://members.dslextreme.com/users/bikecliff/images/GSR_Greeting.html and http://members.dslextreme.com/users/bikecliff/

Don't give up, that bike needs your help, and with all of the info and knowledge here, you have the resources to do it yourself. Dig in, get your hands dirty, and fix your bike! If you won't do that, then you're missing out on at least half the fun of owning one of these relics! :)
 
striker said:
i think i give up. eny 1 wont to buy a 81 gs 850gl, 15,000 mil now with a ticking in the engine?
Click to expand...

I'm a girl and I was able to rebuild my carbs with the help of this forum. No reason that you can't do it.
 
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