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airbox on= no run

  • Thread starter Thread starter gs850cafe
  • Start date Start date
tkent02 said:
No, 115 is the stock jet for your CV carbs.
Click to expand...

found on cliffs site...didnt see it last time i looked

GS850 Carb Specs:
Measurements = mm (in.)
Carburetor type = Mikuni BS32SS
Bore Size = 32 (1.26)
I.D. No. = 45110
Idle rpm = 1050 +/- 100rpm
Fuel Level = 5.0 +/- 0.5 (0.20 +/- 0.02)
Float Height = 22.4 +/- 1.0 (0.88 +/- 0.04)
Main Jet = #115
Main Air Jet = 1.7
Jet Needle = 5D50
Needle Jet = X-5
Pilot Jet = #40
Bypass = 1.0, 0.8, 0.8
Pilot Outlet = 0.7
Valve Seat = 2.0
Starter Jet = #32.5
Pilot Screw = Preset (actually, these can be adjusted - start with about 2 turns out from lightly seated)
Throttle cable play = 0.5-1.0 (0.02-0.04)
 
its not getting fuel...if i put the foam over carbs and cover one carb up so it sucks up fuel it will run...once its an for a sec it will fire back up again no choke or anything..

airbox on, choke on...it just hits here and there...
 
Set it back to 3 turns out, airbox on with filter and top. You may want to adjust the idle up a tad for now to see if it will start but be ready to adjust down if necessary. Prime the bowls if necessary.

Just a thought. Tom (TKent) gave you really good advice earlier so try it again. Also, is your vacuum line in good shape?
 
cowboyup3371 said:
Set it back to 3 turns out, airbox on with filter and top. You may want to adjust the idle up a tad for now to see if it will start but be ready to adjust down if necessary. Prime the bowls if necessary.

Just a thought. Tom (TKent) gave you really good advice earlier so try it again. Also, is your vacuum line in good shape?
Click to expand...

yep tried that already..didnt work...has brand new vac line
 
Okay Octain, I'll bite. How will the plugs cause the problem if it fires with restriction over the carbs (by hand versus the airbox)?
 
cowboyup3371 said:
Okay Octain, I'll bite. How will the plugs cause the problem if it fires with restriction over the carbs (by hand versus the airbox)?
Click to expand...

new CORRECT lol plugs...gapped to spec, and yes if i cover the carbs with foam/rag, hold my hand over 1 maybe 2 carbs completely soon as it hits take my hand off an i can ride it up the road no probs...runs rather good actually
 
cowboyup3371 said:
Okay Octain, I'll bite. How will the plugs cause the problem if it fires with restriction over the carbs (by hand versus the airbox)?
Click to expand...

I dont know but new plugs will eliminate any question of them being bad.
Honestly, I dont think the carbs are clean or the air box or something isn't properly sealed.
 
Octain said:
I dont know but new plugs will eliminate any question of them being bad.
Honestly, I dont think the carbs are clean or the air box or something isn't properly sealed.
Click to expand...

then cliffs site isnt right...i did everything the exact same way
 
No it's right but you'll be surprised at how many times someone will have to clean a set of carb to get them right.

Make sure you don't have any air leaks in your airbox boots as well as the box itself.
 
cowboyup3371 said:
No it's right but you'll be surprised at how many times someone will have to clean a set of carb to get them right.

Make sure you don't have any air leaks in your airbox boots as well as the box itself.
Click to expand...

triple checked it
 
gs850cafe said:
carbs are synced...

i did 2 turns out each one
Click to expand...
If you can't get it to run, how did you sync the carbs? :-k

The IDLE MIXTURE ADJUSTMENT SCREWS that you have turned out 2 turns each, are NOT the sync adjusters. :eek:

The synchronizing adjusters are on the throttle shaft between the carbs. You do a "bench sync" to get them visually close to each other by looking through the carbs with some light behind them, so you can judge the size of the sliver of light. When you get the carbs on the bike, you start the engine, warm it completely so you are off the "choke", then connect your vacuum gauges and synchronize the carbs so they all have the same vacuum level.

If you haven't gotten the bike running yet, there is NO WAY the carbes are sync'ed.
noway.gif


.
 
carbs have been synced is whats bad lol....i got a local guy coming to check it out tonight...

like i said once i get it running its fine...it will idle on its own just fine...run like a champ an everything

whatever is causing it...its somethin stupid
 
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gs850cafe said:
carbs have been synced is whats bad lol....i got a local guy coming to check it out tonight...

like i said once i get it running its fine...it will idle on its own just fine...run like a champ an everything

whatever is causing it...its somethin stupid
Click to expand...

Just guessing here.. Could it be the way you are trying to start it?
 
My 80 has no petcock. When mine acted that way i took the vacuum line off at the carbs. I used (mouth )vaccum to make sure the check valve was working.
 
well i think we got it figured out...my idiot self didnt hook up the vent line from top of airbox to breather cover....

now its started just fine warm...but ill find out in the mornin if thats what was causin it....

thing ran great down the road too...pulls really good an everything
 
it wont start in the morning...its really ****ing me off now...starting fluid starts it then it dies again...

i got it started with starting fluid...its a bear to get it goin....hafta keep it about 2-3k rpm with choke open for about 2-3 min...

once bike is warm,and say it sits for 10 minutes... it fires right back up no problems
 
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