CV carb set up after rebuild

[Wallowgreen]

Gents,

I'm about to strip down, clean and rebuild the CV carbs on my '82 GS1100GL and have been reading up the guide and other information I can find either here or places like BikeCliffe's site.

All seems to make sense except when I did the VM's from my '79 850 there were post reassembly notes on how to set the pilot air and fuel screws to get the mixture close enough for the engine to fire up. Then there was further advice on how to adjust those screws on a per carb basis to get the mixture as close as possible to correct.

I don't see anything like that with the CV rebuild notes so assuming I need to do a similar thing this time, how do I go about it - what am I missing?

Can someone coax an imbecile to a higher understanding. Thanks as always.

[BassCliff]

Hi Mr. Wallowgreen,

There is a carb oem spec sticky thread at the top of the Tech Section. Search the thread for GS850 and you'll find this:

GS850 (80) the specs are for the CV's

idle.................... 1050 +/- 100 r/min
carb................... mik BS32SS
id no................... 45120
bore size ............ 32 (1.26)
float height ......... 22.4 +/- 1.0 (0.88 +/- 0.04)
fuel level ............ 5.0 +/- 0.5 (0.20" +/-0.02")
VALVE SEAT........ 2.0
STARTER JET....... 32.5
PILOT SCREW ..... 3.5
PILOT AIR JET ..... #200
pilot jet............... #42.5
jet needle........... 5D57-3 (the -3 3rd notch)
needle jet .......... X - 6
pilot outlet........... 0.7
BY PASS............. 1.0, 0.8, 0.8
MAIN AIR JET...... 1.7
main jet............. #115


Also check out these two links on my website:

Carb Specs-Float Height-Jetting

Carb Sync Notes

The specs in the carb oem thread say 3.5 turns out, but many here recommend starting with 2 or 2.5 turns out from lightly seated.

Thank you for your indulgence,

BassCliff

[Steve]

That's good information, Cliff, except he's working on a 1000GL this time.

Wallowgreen, if your bike is stock, as far as airbox and exhaust are concerned, be sure to set the float levels properly (lots of recent threads on that subject), then set the idle mixture screws between two and three full turns out from lightly seated. Your VM carbs on the 850 had separate screws for fuel and air. The BS carbs you have on your 1000 use a fixed air jet in the carb intake and a fixed fuel jet in the float bowl, so the mixture is always the same. The only thing you can adjust is how much of that mixture gets in, and you do that with the idle mixture adjust screw that is over the carb outlet.

.

[Wallowgreen]

Cool, thanks guys.

[BassCliff]

That's good information, Cliff, except he's working on a 1000GL this time.

Oops. Sorry about that.

So I searched the carb oem spec thread for the GS1100 and found:

GS 1100
1982-83
G, GL, GK Model

Carb....................Mikuni BS34SS (4 separate carbs)
bore size..............34mm (1.34)
id no ...................49400
idle r/min..............1050 +/- 100 r/min
fuel level...............5.0mm +/- 0.5 (0.20 +/- 0.02)
float height............22.4mm +/- 1.0 (0.88 +/- 0.04)
Main jet.................#115
Main Air jet............1.7
jet needle...............5D58
Needle Jet.............X - 3
Pilot Jet.................#40
By-pass.................0.9, 0.8, 0.8 (0.04, 0.03, 0.03)
Pilot Outlet.............0.7
Valve seat..............2.0
Starter jet...............#50
Pilot Screw............. PRE-SET (between 2 and 3 turns out)
Pilot Air Jet..............#170
throttle cable play......0.5 - 1.0 (0.02, 0.04)
Choke Cable Play......0.5 - 1.0 (0.02, 0.04)

I apologize for my confusion.


Thank you for your indulgence,

BassCliff

[lordcannon88]

Gents,

I'm about to strip down, clean and rebuild the CV carbs on my '82 GS1100GL and have been reading up the guide and other information I can find either here or places like BikeCliffe's site.

All seems to make sense except when I did the VM's from my '79 850 there were post reassembly notes on how to set the pilot air and fuel screws to get the mixture close enough for the engine to fire up. Then there was further advice on how to adjust those screws on a per carb basis to get the mixture as close as possible to correct.

I don't see anything like that with the CV rebuild notes so assuming I need to do a similar thing this time, how do I go about it - what am I missing?

Can someone coax an imbecile to a higher understanding. Thanks as always.

I am going the exact same thing with my carbs right now. and we have the same bike. ill let you know how everything goes on mine.

[Suzuki mad]

I followed the guide for CV's on my 81' GS1000 E and had no problems. It looks a lot harder in the picture than it does when you've got them in your hands to work on.

Suzuki mad