D
D-Mac
Guest
Quick question to discuss with those who have tinkered with GS550 cv carbs....
Bike: 1981 GS550 with cv carbs. This is my "project" that I've totally rebuilt over the past year (I have a very detailed thread in the project section).
As others have done, I am running a Dynojet kit for the 1982 Katana (closest fit for this bike, as the '82 550s and 81s have the same carbs). I'm also running K&N paired filters, running a 4-1 Mac exhaust (baffled), and the engine is basically stock. It has good compression and a leak-down test was good too.
When re-starting the bike, it idled great, but showed all the classic signs over being way too rich under throttle - ran worse as it warmed up, bogging down under throttle (worsening as it warmed up), and it would foul plugs very quickly (within seconds).
The dynojet kit calls for the new needles to be on the 3rd e-clip position down. I set them up on the 4th clip position down, so I expected it to be a little rich, but not THAT rich. I pulled the carbs and opened them up anyway. Here's what each needle looked like:
***So here's my question*** There were no detailed directions for my jet kit other than recommended settings, but it did say "keep stock washers in their positions" so I did that when I rebuilt them. HOWEVER, I don't think they were correct when I got the bike, so I might have them wrong now.
I remember reading something somewhere about owners swapping the fat spacer and the washer around because Suzuki jetted these carbs too lean from the factory. I wondered if that had happened to this bike before I got it. If you look at the pic above, is that correct? I'm now thinking it isn't. Just imagine the fat orange spacer being moved to ABOVE the black e-clip, and the small silver washer being moved below the clip. That would essentially lower the needle by nearly the diameter of the fat spacer (minus the diameter of the thin washer) and make it run much less rich.
So I swapped the spacer and washer - to what I now think was stock. Like this:
Soo....Is this the stock position for the spacer/washer, or is it like the first pic??
Bike: 1981 GS550 with cv carbs. This is my "project" that I've totally rebuilt over the past year (I have a very detailed thread in the project section).
As others have done, I am running a Dynojet kit for the 1982 Katana (closest fit for this bike, as the '82 550s and 81s have the same carbs). I'm also running K&N paired filters, running a 4-1 Mac exhaust (baffled), and the engine is basically stock. It has good compression and a leak-down test was good too.
When re-starting the bike, it idled great, but showed all the classic signs over being way too rich under throttle - ran worse as it warmed up, bogging down under throttle (worsening as it warmed up), and it would foul plugs very quickly (within seconds).
The dynojet kit calls for the new needles to be on the 3rd e-clip position down. I set them up on the 4th clip position down, so I expected it to be a little rich, but not THAT rich. I pulled the carbs and opened them up anyway. Here's what each needle looked like:
***So here's my question*** There were no detailed directions for my jet kit other than recommended settings, but it did say "keep stock washers in their positions" so I did that when I rebuilt them. HOWEVER, I don't think they were correct when I got the bike, so I might have them wrong now.
I remember reading something somewhere about owners swapping the fat spacer and the washer around because Suzuki jetted these carbs too lean from the factory. I wondered if that had happened to this bike before I got it. If you look at the pic above, is that correct? I'm now thinking it isn't. Just imagine the fat orange spacer being moved to ABOVE the black e-clip, and the small silver washer being moved below the clip. That would essentially lower the needle by nearly the diameter of the fat spacer (minus the diameter of the thin washer) and make it run much less rich.
So I swapped the spacer and washer - to what I now think was stock. Like this:
Soo....Is this the stock position for the spacer/washer, or is it like the first pic??
