Question about 1984 Suzuki GS 700 ES

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Motor hard to start, but does run , but then won't idle?

There a adjusting knob right in the center of the carbs I assume its a idle adjustment? The motor will eventually run but won't idle.

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If i recall yes that is, but a bike that old may need a good carb cleaning if it has been sitting around for a while

Posted on Jun 15, 2009

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1 Answer

Carb ajustment


Only Info I see is "Homelite Chain Saws" - not much to go on.
Most saws have two carb adjustment screws, Hi, and Lo.
Assuming the saw will start and run enough to warm up, then
adjust the Lo screw in, clockwise, until the motor starts to slow down,
turn only about 1/8 turn at a time. From the point where it starts to slow down, turn it out about 1/4 turn. This should give you a decent idle. Now pull the throttle, and see what happens.
A - Saw runs up to speed, but dies off, or starts to slow on it's own.
turn Hi idle screw out about 1/4 turn.
B - Saw speeds up, but runs sluggish, fat - not real hi end.
Turn Hi screw IN, about 1/8 or so, and try again, or adjust
while running at full throttle. (best way)
IF it won't run well, try turning both screws all the way in to seat them, then come back out about 1-1/2 to 2 turns. this should get you in the ballpark to set things up as above.

Once the saw is running well, adjust the idle screw to a smooth idle but slow enough that the chain stops moving.

Stay safe

Jul 01, 2012 | Homelite Garden

2 Answers

Poulan 446t Will start, won't continue to


The diaphragm in the carb is likely ruined from the gas gelling onto it. This will put pinholes in it and then it won't work properly. Pick up a carb kit and rebuild it (if parts available) and then you should be good to go. If you can't rebuild the carb, a replacement will run you 30 bucks or more.

Aug 21, 2011 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

I recently bought a Suzuki gs 550 and need to reduce idle speed i don't know how to do this at the carb


the idle adjustment screw is located between the number 2 and 3 carburator float bowls bottom rear. I can bairly get my hand on it, but found that a flat blade screwdriver works fine for making ajustments. backing out the screw lowers the idle speed, while running it in increases it. To adjust make sure the motor is warmed up and the choke is off. Make adjustments from the right side (looking at bike from the back), by pushing with the screwdriver on the knurals of the adjustment knob, pushing knurals up backs the screw out, conversly down runs it in. Try for around 1000 rpms for your set speed. You want it to idle smooth and low, but you want it set so it won't die out when you come to a stop when you are riding. If you can not get the idle in this range, then there is some other problem needing attention. However, the idle at times may run a little bit higher than normal when you come to a stop after a hard ride, and should return to normal set speed after it cools down some. You should also make sure that the throttle cable is set at the proper tenion, if too tight, you won't be able to lower the idle. you may have to make adjustments a few times to get it right.

Jun 12, 2011 | 1980 Suzuki Gs 550 L

1 Answer

I have a 1982 Kawasaki KZ1100D1 Spectre and have problems with it red-lining upon starting. It was running fine and idleing @ 1500rpm and I thought it was a little high so I adjusted the Idle screw and...


If you had to adjust with a screw driver you are probably altering the air bleed or mixture control and not the idle speed as a rough guide turn the screws fully in but do it gently as winding them in hard will damage the carbs and then undo the screw one and a half turns this should bring the carb back
into range
the idle adjustment is a finger adjustment knob in the center of the carbs(fuel tank lifted or removed to gain access) the problem with too high idle can be du to air leaks through the inlet rubbers leaking or being perished check for gaps bettween mating faces of carb rubbers to cylnder head

Feb 10, 2011 | 1984 kawasaki KE 125

2 Answers

SUZUKI RF 600 R, problem with idle speed and cold start, i cant control trotle at idle speed, at higher rpm the engine is working without problem but when i rellease the trotle engine is stop. What can i...


If the bike starts up and the idle speed creeps to high revs all on its' own, this indicates an air leak somewhere between the center throat of the carb and the cylinder head. This is normally a rubber seal or rubber manifold that is old, hard and cracked. I am sure the carbs need to be cleaned, remounted and adjusted. This is a nightmare for the novice mechanic. Replace all rubber fittings and seals including hose fittings and hoses.

Aug 13, 2010 | 1995 Suzuki RF 600 R

1 Answer

CLEAND CARB NEED TO KNOW HOW TO ADJUST CARB


Most carbs have the adjustment removed (EPA) but if yours still has the adjusting screws here are the seat of the pants methods:

One Screw Carb: Turn it all the way in and then back out 3-1/2 turns, start the engine and make slight turns in or out until the motor runs smooth from idle to wide open, do not get it too lean, turn in until max RPM is reached then turn out 1/8 turn and go from there.

Two Screw Carb: You adjust the one to remedy either the low or high, high is adjusted until the motor runs smoothly under load at high RPM and the low is adjusted until idle and off idle is smooth.

Feb 27, 2010 | Troy Bilt Tb70ss Gas Trimmer

2 Answers

How do adjust the idle on 1990 gsxr 750


the idle adjustment on the oil cooled motor is in between carb 2 and 3. you have to take the right side fairing off to do so

Oct 18, 2009 | 1990 Suzuki GSX-R 750 L

2 Answers

Hyosun Scooter Carb Adjustments


Very good thought process on the adjustments. The throttle screw sets the idle speed and the air screw sets the fuel mix at idle speed. The stock setting is 1.5 turns outward. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward.

From this point you adjust the idle speed then adjust the air screw for fastest idle speed at that throttle screw setting. If the idle speed becomes faster than desired after adjustment, just reset the throttle screw and then reset the air screw.

A “very helpful” rating for this answer? Thanks!

Jun 27, 2009 | 2002 Hyosung Comet 125

1 Answer

Timing Adjustment issues!


If the bike runs then Top Dead Center (TDC) is not an issue. But to check piston stroke position, Remove the valve cap cover on the intake of the front cylinder. Remove both the spark plugs. Rotate the crank shaft untill the rocker arm starts to move. The piston is now starting down on the intake stroke. Rotate the crank further and the rocker arm moves in the opposite direction. The piston is now going upward on the compression stroke. Look at the marks on the flywheel. Rotate the crank untill the TDC mark lines up with the timing index mark. The front piston is now at TDC.

If your model has carbs then the backfire fix requires you to syncronize and balance the carbs.
SYNCHRONIZE THE CARBS
Remove the air filter and rubber fittings to allow you to see into the throat of both carbs. You may need a mirror to see inside. You need to be able to see the slides go up and down when you twist the throttle. Now turn the fitting where the cable goes into each carb such that there is just a bit of slack in the cable, 1/16" is plenty. Lock ONE of the cable adjusters down tight. All further adjustments will be made on the other carb.

With the motor turned off twist the throttle very slowly while looking at the slides. Both slides need to begin lifting at the exact same moment. If the slides don't raise at the exact same time then slowly twist the throttle until the locked adjuster slide just barely starts to move. Hold the throttle still and turn the adjuster on the other carb so that the slide on that carb just barely starts to move also. Now recheck the slide movement timing. Do this process until the slides on both carbs begin to raise at the EXACT same moment. Lock down the loose adjuster and re-check the slides.

BALANCE THE CARBS
Turn the throttle screw on the LEFT carb one half turn inward. Now start the engine and get it warmed up. With the engine running, remove the RIGHT spark plug wire. Adjust the idle speed on the left carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

Now turn the throttle screw on the RIGHT carb one half turn inward. Restart and rev the engine. Next, remove the LEFT spark plug wire. Adjust the idle speed on the right carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

Turn the idle screw on each carb EXACTLY ONE QUARTER turn outward and restart the engine. The engine will be probably be idling very fast. Adjust both the idle screws equally from this point to get to the desired idle speed. Congratulations, you have just balanced and synchronized your carbs.

Please rate this solution. Thanks sgtswampdonk!

Apr 02, 2009 | 1999 kawasaki VN 800 Vulcan Classic

1 Answer

Honda 1300c backfire through carb at wide open throttle. I have open up the exhust and rejetted the carb . the bike will run fine up to mid throttle or 65 mph but if you accellerate hard or go to wide open...


Try balancing ans syncronising the carbs.
BALANCE THE CARBS
Turn the throttle screw on the LEFT carb one half turn inward. Now start the engine and get it warmed up. With the engine running, remove the RIGHT spark plug wire. Adjust the idle speed on the left carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

Now turn the throttle screw on the RIGHT carb one half turn inward. Restart and rev the engine. Next, remove the LEFT spark plug wire. Adjust the idle speed on the right carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

Turn the idle screw on each carb EXACTLY ONE QUARTER turn outward and restart the engine. The engine will be probably be idling very fast. Adjust both the idle screws equally from this point to get to the desired idle speed.

SYNCHRONIZE THE CARBS
Remove the air filter and rubber fittings to allow you to see into the throat of both carbs. You may need a mirror to see inside. You need to be able to see the slides go up and down when you twist the throttle. Now turn the fitting where the cable goes into each carb such that there is just a bit of slack in the cable, 1/16" is plenty. Lock ONE of the cable adjusters down tight. All further adjustments will be made on the other carb.

With the motor turned off twist the throttle very slowly while looking at the slides. Both slides need to begin lifting at the exact same moment. If the slides don't raise at the exact same time then slowly twist the throttle until the locked adjuster slide just barely starts to move. Hold the throttle still and turn the adjuster on the other carb so that the slide on that carb just barely starts to move also. Now recheck the slide movement timing. Do this process until the slides on both carbs begin to raise at the EXACT same moment. Lock down the loose adjuster and re-check the slides.

Please rate this solution. Thanks!

Mar 30, 2009 | 2004 Honda VTX 1300

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