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Pilot jet needle and pilot jet screw needle front seated or turned out 3 turns or pilot screw backed out 3 turns

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 55 Answers

SOURCE: 2000 r6 running rich or flutters at 2500 rpm

are your carb sync'ed right?

Posted on Dec 15, 2008

  • 190 Answers

SOURCE: Cleaning Carb Jets

not to a trained ear also go by rpm and spark plug color

NOTE: use copper wire to clean jets, sync is just thottles are same position as all carb's just leave them adjustments alone will be fine if are out use a 1/8 drill an place in between piston/butterfly to carb bore to sync/calibrate

better use a manometer for adjusting screws

depends on condition of org parts

worn = richer running

new = lean an clean

also if changed the exhaust system need to
re-calibrate carbs for max performance

Posted on May 09, 2009

sisadsl
  • 1508 Answers

SOURCE: my 2005 yz250f will not idle and backfires on

check valve clearances first. will cause backfire and ide probs
a leaking exhaust gasket or low ignition voltage will cause backfire

Posted on Feb 22, 2011

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3 Answers

The carb tuning is off on my honda moped.... please help! It cranks and will run, but as i pull back on the accelerator it loses power and begins to die. PLEASE TELL ME HOW TO TUNE THE CARB PROPERLY!


lower brass screw ( air/fuel mixture screw) wind in fully then wind out 1 & 1/4 turns. undo ally top ( cable runs through it ) you will find a barrel on a spring holding the needle, the needle has a cir clip governing its travel into the needle seat, it should be in the middle groove ( there are 3 grooves) iff this does not cure he problem remove the carb, turn upside down remove 4 screws and check the float needle valve is operating.

Apr 12, 2015 | Honda Motorcycles

1 Answer

Suzuki impulse GSX400X


Here is specs for those carbs
- AISAN AS27VW
I.D. No. - 04A10
Bore - 27 mm
Idle r/min - 1300+/-100 r/min.
Fuel level - 9.0+/-0.5 mm
Float height - 20.5+/-1.0 mm
Main jet - #94
Main air jet - 1.2 mm
Jet needle - 5B10-3rd
Needle jet - 2.60 mm
Throtlle valve - 11.0
Pilot jet - #34
By-pass - 0.8,0.8,0.8 mm
Pilot outlet - 10.8 mm
Valve seat - 2.5 mm
Starter jet - GS1 #60, GS2 #54
Pilot screw - PRE-SET (2 turn out)
Pilot air jet - 1.35 mm
Throttle cable play - 0.5 - 1.0 mm
Choke cable play - 0.5 - 1.0 mm

Aug 27, 2014 | Motorcycles

1 Answer

Idle adj screw vibrates out and the idle speed is high.


Hi Charles Gregory.

When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.
Make sure your spring that goes on the idle screw is in place.
You can also use some "locktite" thread locking compound on the threads of the needle if the spring is missing.
Normally you will adjust your idle jet to 1/2-3/4 turn open from the bottom seated position.
Then you will re-adjust the low speed of the engine when the engine is warm by turning the idle screw in or out till the engine runs smoothly at idle speed, around 1200 RPM.
The high speed jet is adjusted to 1 1/2- 1 3/4 open from the bottom seated position, after the engine is warm.
Then re-adjusted by turning the High Speed jet adjustment screw in or out till the motor runs smoothly at high speed.
Alway use the "lightly seated" method if you have not changed the screw settings.
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Bud

Oct 01, 2012 | Garden

1 Answer

What is the air-gas settings on the carb?and which is the gas or air?


Hi windsordew67...
Normally the larger of the two screws is the fuel needle, the smaller of the two is the air needle.
Before you remove or try to adjust your low and high speed jets you should always count the number of turns it takes to lightly seat the idle mixture screw and high speed needle adjusting screws.
Be sure to write the number of turns down on a piece of paper so you will know how many turns from the seated position to open the jets when you go to reinstall them, or if you remove them for cleaning or replacement.
Normally you will adjust your idle jet to 1/2 to 3/4 turn open from the bottom seated position.
Then you will re-adjust the low speed of the engine when the engine is warm by turning the idle screw in or out till the engine runs smoothly at idle speed, around 1200 RPM.
The high speed jet is adjusted to 1 1/2 to 1 3/4 open from the bottom seated position, after the engine is warm. Then re-adjusted by turning the High Speed jet adjustment screw in or out till the motor runs smoothly at high speed.
But always use the "lightly seated" method if you have not changed the settings.
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Jun 16, 2011 | Ryobi Garden

1 Answer

When it's warm, I can crank my 1985 Yamaha Maxim X easily. But I want to know how I can tell if my carbs are NOT cleaned properly. If it's cold, I can't even jump start it. I replaced the needles and seat,...


Take out the pilot air screw[s] from the carbs and remove the pilot jets. Check for dirt and make sure the hole in the jet is clear. Check the pilot air screw for dirt wipe clean carefully as the inboard tapered section is easily damaged.
Check the float bowls are clean remove main jets and check they are clear of any dirt/debris etc.
Make sure when you replace the pilot air screws you screw them in carefully until they just stop. Do not over tighten in any way. (Be very gentle please). Then turn them out the correct number of turns as stated in you manual.
The pilot jets control starting and throttle opening up to about halfway.

Jan 27, 2011 | 1985 Yamaha XJ 700 X Maxim

1 Answer

I have a primary jet and secondary jet in the carburator of the 500 gl silverwing . and the jets I have is 75 and 125 which goes where . and what should be the setting on the air jet ?


The secondary main jet (125) goes into the jet needle holder in the center of the carb (needle). The primary main jet (75) is between the secondary main jet and the pilot screw (this one is slightly off center) . The start setting for your air screw should be 1 3/4 turns. Warm up your engine and drive for ten minutes. Adjust your idle speed to 1100 + or - 100 rpm. Now turn pilot screw in or out to get highest idle speed. Readjust idle to 1100 rpm. Now turn pilot screw in till idle speed drops 100 rpm. If pilot screw seats go to next step. Adjust the pilot screw out 1 full turn from 100 rpm drop point. Now reset Idle to 1100 rpm. That is how Honda says to set your air screw. Standard setting is probably sea level and going through the procedure will set you up for the altitude where you ride. Do the adjustment during good weather at the altitude you plan to do the most riding.

Aug 27, 2010 | Honda CX 500 B Motorcycles

1 Answer

Hi, I have a 2004 883 Sportster converted to a 1200. It has the Screamin Eagle carb kit, Screamin Eagle II slip on mufflers & a Sceamin Eagle air filter backing plate with K & N filter. I want to...


The service manual says to "remove the carb" for this job. But yes you can remove the main jet out without removing the carb out. You can rotate the carb and slide it off the intake, but watch how much slack you have in the cables, remove the bottom plug that adjusts the fuel mixture.Take the seat/tank off and loosen both the 3mm bolt and philips mounting screw so you could turn the carb to were you could remove the big bottom 17mm bolt . When you look up into the bolt hole with a light you can see two access holes for both the main and the pilot jets.the pilot can be changed by tilting the carb bottom to the left and removing the big bolt on the bottom. It's accessible without removing the float bowl. To get the needle out, you need to pull the seat and tank, remove the carb top cover (3mm allen bolts), remove the 4mm allen bolt on top of the slide, being careful not to lose the spring and other parts (3 pieces total). Pull the needle out with a needle nose and you're set. The main jet is replacable from the 17mm cap on the bottom. Your needle tube/jet may come out with the main jet but is no biggy. You can drain the float bowl before doing it if you loosen the little 3mm bolt on the bottom of the bowl. Just be sure to readjust the throttle cables after you move the carb back. Tilting the carb pulls all the slack out of the cables and the bind a bit if you dont pull them back. You can remove the main jet with a main jet tool or a 1/4 inch socket. If the needle tube jet (long skinny tube that the main jet threads into) comes out with the main jet, simply unscrew it from the main jet with an 8mm wrench and the tool you used to take out the main jet.You can put the new main jet back in the tube first and then replace the tube back into the carb. The needle will be hanging out of the bottom of the carb where the tube goes. Because you have the carb at an angle the needle will be hanging at an angle, so you need to "thread" the needle into the tube to get it to go back in.Be sure not to over tighten the main jet because you can break it off. Also when you turn the carb, the front boot can turn if it is not tight (this is common on this bike). Be sure to line up the notch on the bottom front intake boot and tighten the front clamp. It is hidden under the crankcase vent hose that runs over the top of the boot. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Jul 01, 2010 | Harley Davidson XL Sportster 883...

1 Answer

When i crank on the gas sometimes it will bog out how do i fix that


If the hesitation is slight, a minor adjustment to the air screw will cure this problem - assuming your air filter is clean. If the bog is severe, then you will likely need to alter your pilot jet.

The air screw should be about 1.5-2 turns out from seat. If it is cranked in further than 1 turn to remove the hesitation, then bump your pilot jet up a size. If it cranked out more than 2.5 turns, then decrease your pilot jet size. One of the screws on the side is the idle speed and the other is the 'idle mixture' or air screw.

The needle is also in this mix but it's a fine tuning thing and since it is a bit tougher to get to, I usually get the above steps nailed down first then move to the needle to fine tune the mid range response - if needed. Ususally, you can get away without messing with the needle.

Jan 27, 2010 | 2005 Suzuki RM 125

1 Answer

What is the stock jetting for a '97 yamaha RT 100?


17.5 pilot jet
140 main jet
Jet Needle - 4L6 with the clip in the 3rd position
Air Screw 1.5 turns out from lightly seated

Aug 09, 2009 | 2008 Yamaha Yamaha G5

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