Over excited bike

lonelywolf8588

lonelywolf8588

Been Around the Block
I'm going through and replacing the electrical on my '81 GS750. I check periodically to make sure everything works as I go. I decided to start it for the first time since starting this project and it is running wide open now. Any ideas?
 
lonelywolf8588 said:
I'm going through and replacing the electrical on my '81 GS750. I check periodically to make sure everything works as I go. I decided to start it for the first time since starting this project and it is running wide open now. Any ideas?
Click to expand...
don't ride it like that :D
srsly tho something wrong check all:
throttle/cables, carbs
ignition advancer
 
Yep, first check to see the throttle cable isn't stuck, next check the intakes. It seems like I say this all the time, but usually something like this is a vaccum leak. You either didn't cead the carbs into the intakes properly or the intakes are leaking....
 
I didn't touch anything mechanical. Just wiring. I will check the vacuum line from the petcock to the carbs but that and the fuel lines e are the only hoses I've moved.

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the throttle should snap closed with good positive action
check the idle speed screw ,trun it one way then the other,watch for movement on the rack
if the throttle shaft rack is fully seated against the idle speed screw it could simply be somebody has screwed in in too far
 
I will check the throttle. I did swap the bars and put end mirrors on. They didn't seem to be interfering but can't hurt to look.

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The throttle is working fine. I even backed the idle screw out all the way and it is still running really fast. The throttle still works and rev the engine even more when I twist it. I also didn't see any problems with the petcock hoses.
 
if you swapped the bars maybe the throttle cable is adjusted in such a way that the throttle is being held open? sounds stupid, but i did the same thing recently while putting things back together and it started and idled at 4k.
 
There's nothing electrical, outside of the advance unit, that would cause high revving.

You have a mechanical problem, most likely related to carbs/throttle position.

Find the issue and rectify it.
 
lonelywolf8588 said:
I fixed it. I didn't really do anything but it is solved. Thanks for the info.
Click to expand...

Look carefully at your throttle cable routing - I bet you gave it set up such that the cable was binding up. If you don't rectify that, it can happen again - and it's not much fun when you're trying to slow down.
 
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