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gs1000g uk carb specs

  • Thread starter Thread starter sootyplugs
  • Start date Start date
S

sootyplugs

Guest
Hi Folks
I have just purchased an American import 1980 Suzuki gs1000g that has come from Colorado over to the uk.
The carbs are running massively over rich, a 15 mile ride will completely coke them up, the previous owner of the bike lived 12000 ft above sea level, so I would imagine this will have an effect on the running due to the carb specs needed !

Does any body have any info on the correct uk set up for these carbs...ie

  1. float hight level
  2. main jet size
  3. pilot jet size
  4. air screw and mixture settings
cheers
Andy :)
 
hi thanks for that I have found the American spec...where they the same
 
hampshirehog said:
Yes they are the same.

If the PO had jetted for high altitude you should be running weak.
Click to expand...

Not really. The CV carbs are elevation compensating, stock jetting runs fine up to 14,000' which is the highest road around here if the airbox and exhaust are stock. It will of course be down on power but it will run correctly other than that.

Pilot circuits are not compensated, so the idle will need to be adjusted. If they were set for Colorado they would need to be adjusted to run at lower elevation, usually just the mixture screw.

Of course the PO could have dicked it all up, that's been known to happen.

If the airbox and exhaust have been modified it could go either way.
 
Don't forget the possibility that the engine has not had the proper maintenance done and may be in need of some work as well. Valves adjusted, carbs rebuilt, fluids changed and such should all be performed on any new acquisition.

Welcome to the GSR and good luck with your new bike. Go here for a ton of information and a warm welcome: GS Resource Greetings
 
Hi
Thanks for all the help, the bike is running a stock airbox and exhausts so I can only assume that someone in the past has altered the carb settings at some point.

cheers
andy:lol:
 
JTGS850GL said:
Don't forget the possibility that the engine has not had the proper maintenance done and may be in need of some work as well. Valves adjusted, carbs rebuilt, fluids changed and such should all be performed on any new acquisition.

Welcome to the GSR and good luck with your new bike. Go here for a ton of information and a warm welcome: GS Resource Greetings
Click to expand...

Hi

the engine is extremely healthy, very sweet and the bike appears to have been very well looked after...I will post some pics !
 
Last edited:
tkent02 said:
Not really. The CV carbs are elevation compensating, stock jetting runs fine up to 14,000' which is the highest road around here if the airbox and exhaust are stock. It will of course be down on power but it will run correctly other than that.

Pilot circuits are not compensated, so the idle will need to be adjusted. If they were set for Colorado they would need to be adjusted to run at lower elevation, usually just the mixture screw.

Of course the PO could have dicked it all up, that's been known to happen.

If the airbox and exhaust have been modified it could go either way.
Click to expand...

Thanks for that, I will investigate the mixture which i expect will sort it. !
 
sootyplugs said:
Hi

the engine is extremely healthy, very sweet and the bike appears to have been very well looked after...I will post some pics !
Click to expand...

I wouldn't assume anything that a previous owner has done. The valve adjustments are the most under done service required by these bikes and is probably one of the most critical "routine" adjustments for performance and longevity. At least check to make sure they're in spec.
 
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