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Hi! I have bought a 1982 GS750 which has been renovated and rebuilt by the previous owner.
Possible relevant info:
It does not have the original airbox, it has been exchanged for individual air filters for each carburetor.
It is easily started and works great in idle and in the lower RPM-ranges. Usually works fine all through the rev range on first and second gear, however, in the upper gears there is some stuttering in the mid-high rpms where the bike does not have enough power to increase the revs. If i keep a twisting the throttle it can sometimes get passed this and go in to higher RPM's where it works fine. Other times it just stay in the weak state and and i have to reduce the throttle to make it run "fine" again. It also mostly works fine if i always go through all the revs in each gear (so the bike is always in high enough revs in the next gear when i shift to avoid the low-power area).
The strange part is that its not always. It sometimes work fine both through slow acceleration, and from going full throttle from lower rpms. But most of the time it has the issue.
I'm at a bit of a loss.
Fuel starvation? (not sure how the vacuum etc works on this bike, there is nothing connected to the pipe on the bottle of the gas tank). I have cleaned the carburetor so shouldn't be that.
To much fuel?
Air problems, either to much or two little since they have changed the original airbox, i know that some carburetors can be a bit finicky with that.
Ignition issues/timing? Bad spark?
Anyone here with any good ideas or experiences would be much appreciated.
Thanks
Possible relevant info:
It does not have the original airbox, it has been exchanged for individual air filters for each carburetor.
It is easily started and works great in idle and in the lower RPM-ranges. Usually works fine all through the rev range on first and second gear, however, in the upper gears there is some stuttering in the mid-high rpms where the bike does not have enough power to increase the revs. If i keep a twisting the throttle it can sometimes get passed this and go in to higher RPM's where it works fine. Other times it just stay in the weak state and and i have to reduce the throttle to make it run "fine" again. It also mostly works fine if i always go through all the revs in each gear (so the bike is always in high enough revs in the next gear when i shift to avoid the low-power area).
The strange part is that its not always. It sometimes work fine both through slow acceleration, and from going full throttle from lower rpms. But most of the time it has the issue.
I'm at a bit of a loss.
Fuel starvation? (not sure how the vacuum etc works on this bike, there is nothing connected to the pipe on the bottle of the gas tank). I have cleaned the carburetor so shouldn't be that.
To much fuel?
Air problems, either to much or two little since they have changed the original airbox, i know that some carburetors can be a bit finicky with that.
Ignition issues/timing? Bad spark?
Anyone here with any good ideas or experiences would be much appreciated.
Thanks
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