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Jetting FYI on a 1980 GS1000E

  • Thread starter Thread starter Guest
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So I blocked off the right side air jets(4mm hole) of the air intake side of the carbs and the midrange was better, so this morning I ordered 4 main air jet correctors from Dynojet (part# DC0301). They were only $2 each. I'll update when I install them to see if my saga is finally over. I'm starting to think CV carbs SUCK.
 
****FINALLY!!!!!****

155/152.5 main jets
Needles are up 1.5mm (two small washers on top of needle)
Idle fuel screws out 2 1/2 turns +/-
K&N pods
V&H 4into1
Float height factory
Valves are set at the high end of tolerance
Used DynoJet 4mm air jet plug (right side air port opposite of the jet on air intake side) Part #DC0301 $2 each

Installing the Dynojet plugs made a huge difference
 
Are you using DJ jets? Reason for asking is because the numbering scheme is different from Mikuni.
 
winmag4582001 said:
****FINALLY!!!!!****

Used DynoJet 4mm air jet plug (right side air port opposite of the jet on air intake side) Part #DC0301 $2 each

Installing the Dynojet plugs made a huge difference
Click to expand...

Woohoo, I'm glad I came across this thread then! :D
 
Nessism said:
Are you using DJ jets? Reason for asking is because the numbering scheme is different from Mikuni.
Click to expand...

NO. I should have mentioned that. I got the main jets from 6sigma.
I've gotten other jets from JetsRus, it said they were for Mikuni carbs so I assume they are in line with Mikuni's numbering system...
 
Last edited:
OK. So the GS1000E is running 99.9%.
The last thing I'm looking for now are needles...... factory needles are as follows:
Length: 51.5mm
D1: 3mm
D2: 3mm
D3: 2.8mm
D4: 2.6mm
D5: 2.5mm

Wanting a little thinner needle, maybe something that starts at 3mm and tapers to 2.2mm. I've been combing the net and not finding any real numbers I can go off of and I dont have a lathe that can turn something that small. What have any of you used?
TIA
 
winmag4582001 said:
OK. So the GS1000E is running 99.9%.
The last thing I'm looking for now are needles...... factory needles are as follows:
Length: 51.5mm
D1: 3mm
D2: 3mm
D3: 2.8mm
D4: 2.6mm
D5: 2.5mm

Wanting a little thinner needle, maybe something that starts at 3mm and tapers to 2.2mm. I've been combing the net and not finding any real numbers I can go off of and I dont have a lathe that can turn something that small. What have any of you used?
TIA
Click to expand...

If you're looking to richen the midrange - thinner needles - you can get the same effect by using smaller air correctors.
You say you're using 4mm air correctors, I'd go a little smaller and try it.
 
winmag4582001 said:
Wanting a little thinner needle, maybe something that starts at 3mm and tapers to 2.2mm. I've been combing the net and not finding any real numbers I can go off of and I dont have a lathe that can turn something that small. What have any of you used?
TIA
Click to expand...

I suggest you look up manual thinning of SU needles, using a pillar drill.
 
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