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No Clue, Can Somebody Help!!

  • Thread starter Thread starter jmchambers83
  • Start date Start date
J

jmchambers83

Guest
The last two mornings I've rode my '82 GS750T into work. I gave it plenty of time to warm up before I left and it rode fine the whole 35 miles to work.
When I get to the front gate of the Army base that I work at they have those stupid triangle rubber speedbumps. For some reason I always stall trying to get over them because the second one I have to stop once the front wheel is over it and show my ID then continue and get the back over it.
Anyways, the issue is that once I stall it won't start back up until I've let it sit for about 10 minutes. What the heck is wrong with the bike?
Always makes for great comments from the a$$hole harley riders on base too!
 
I can't say why it won't start, but why not refine your starting technique so it doesn't stall in the first place?
shrug2.gif


Is the bike totally stock, or have you modified the intake and/or exhaust systems?

When you try to start the bike, does it seem to spin the engine fast enough, but not fire?

Have you tried longer or shorter trips, shut it off and tried to re-start?

Have you stalled it in your own driveway on the way home and tried to re-start? Try that some time. If it does not start, pull the spark plugs to check the color of the tips. Sounds like the bike might be running a bit lean (typical) and therefore hot, making re-starts a bit harder.
 
I can't say why it won't start, but why not refine your starting technique so it doesn't stall in the first place?
shrug2.gif


Is the bike totally stock, or have you modified the intake and/or exhaust systems?
-The bike is stock, the only thing I've done to it was put a new clutch cable in last night but the tension seems fine.

When you try to start the bike, does it seem to spin the engine fast enough, but not fire?
-It does seem a bit sluggish when I try to restart it, but when I first fire it up in the morning it turns over fine.

Have you tried longer or shorter trips, shut it off and tried to re-start?
-I have and it didn't do this until yesterday.

Have you stalled it in your own driveway on the way home and tried to re-start? Try that some time. If it does not start, pull the spark plugs to check the color of the tips. Sounds like the bike might be running a bit lean (typical) and therefore hot, making re-starts a bit harder.
-This sounds like a good idea, I haven't checked the plugs yet but I'll try to do that on my lunch break. I just bought the bike about a month ago so I'm still learning the in's and out's of the GS.
__________________
 
Excessive fuel being picked up because of a too high fuel level combined with the fuel sloshing around over the speed bumps?
what has changed since the day it first started having this problem, did the idle change, does the exhaust smell richer?
 
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That wouldn't surprise me either, these aren't ordinary speed bumps, they have about a 5 or 6 inch rise and only about a 6 inch base so they are really sharp bumps. They are a pain to get over.
 
hot stall sometimes is an overly rich condition.

and sometimes it is a electrical / ignition problem.

are there any details about your bike that might point to these general diagnosis?


what you should check is the plugs, and re-set the ignition points ( if you have them)
setting points is an art that takes practice to get them just right for quick starting and good gas mileage.

if the plugs are black and you smell gas often get the float needles and seats to seal and the proper fuel level set .

at least that seems the most likely to me not ever seeing the bike run
 
I wouldn't even know where to begin with setting ignition points, I'm pretty new to bike maintenance and understanding but trying to learn everything I can.

I do smell gas though once in awhile when the bike is sitting but I didn't know that was an issue.
 
This might seem like a huge stretch but check the contacts on the side stand kill switch, if you have one. Maybe once it bounces over the first bump it doesn't make a good contact again. I hate that switch and it's one of the first things I took out of the system after I got my bikes.

Good luck figuring this one out and let us know what it turns out to be. I know I'm sure curious.

Don
 
Sounds good, I'll check my plugs at lunch and see what they look like.

Not sure about the side stand switch Don, I didn't necessarily check to see but my indicator light didn't come on and it usually does when the stand is down even a little bit.

At any rate, I'll check the plugs and report back after to let you know what I've got.

Thanks for the advice guys, good stuff.
 
suggestions...
make sure the air filter is clean, renew/clean/replace as necessary.
check the petcock for a leak into the vacuum line.
check fuel cap venting.

but I think you'll be looking at those carbs soon.
 
Sounds like I got a busy lunch ahead of me! I'll be sure to check all of that as well. Thanks!
 
jmchambers83 said:
I wouldn't even know where to begin with setting ignition points, I'm pretty new to bike maintenance and understanding but trying to learn everything I can.
Click to expand...
I can help you with this issue real quick.

Your bike doesn't have any. :dancing: No need to worry about them.


.
 
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Sweet! Thanks Steve I probably would've been looking for that info for a while, ha ha.
 
Ok, so I finally got around to checking the spark plugs. Now I have a new question though. Does anyone have a color diagram of spark plug conditions?

My Clymer's manual is about 26 years old and does not have color pics so I have an idea of what they are supposed to look like but not 100%.

Numbers 1, 2, and 3 all looked the same (slightly grey on the tips and the bottom exposure to the valve), which according to the discription in the manual was normal. The number 4 plug however, had some carbon fouling which the manual said was caused by either a cold plug, a bad mixture, or dirty air filter.

The air filter isn't the cleanest in the world but why wouldn't the other 3 have the same condition?
 
Thanks Steve. That helps out a lot. I don't want to seem like I'm lazy but usually when I get online it's at work during my break so I don't have a lot of time to do research. I really appreciate your help though!
 
Alright, I am coming back to my old thread. I finally replaced the air filter, the rubber boots and clamps between the carbs and airbox (the old ones were dried out and weren't fitting correctly), I put weather stripping on the air filter housing cover and this cured the stalling issue.:)
I went for a ride today, about 30 miles or so, and when I got back I turned the bike off and tried to turn it back on just for s#!&s and giggles to see if it cured the problem of not starting once the engine is hot. It still wouldn't start!!:mad: After I let it sit for about 5 mins (like before with the stalling issue) it started right up.:confused: Anyone have any suggestions?
 
My 2 cents here, though not familiar with the 750T carbs.
Is your petcock original?
Does it have 3 positions: on, reserve and prime?
If it's on prime, you might be floading your bowls.
Have you checked float height adjustment?
 
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