Question about 2003 Yamaha V Star Classic

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03 650 v star classic: what is the factory

03 650 v star classic: what is the factory setting for the carb, idle mixture screws, 1/2 turn 1 turn 1 1/2 turn 2 turns ?

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2 1/2 turns out

Posted on Apr 19, 2010

Testimonial: "thanks for this info I have a problem with close throttle serge hope this wil be the answer the screws one 1/2 turn the other 3 "

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1 Answer

1987 Kawasaki GPZ 500 S air/fuel mixture setting


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Carburetor Maintenance
Idle Mixture Screw Factory Setting Ex 500 com The home of the Kawasaki...
Kawasaki EX500 Service Manual
OEM Parts for Kawasaki
http://mybikemanuals.com/kawasaki

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Jun 01, 2014 | 1987 kawasaki GPZ 500 S - GPX 500 R

1 Answer

Choke problem


That's an indication that the idle mixture is too lean, as the choke richens up the mixture, allowing it to run.

Your carb should be similar to this:

http://www5.picturepush.com/photo/a/3728808/img/3728808.jpg

The AIR SCREW adjusts the mixture (rich/lean), and the IDLE SCREW adjusts the idle SPEED.

Try screwing in the AIR SCREW 1/2 a turn and see if that helps.
If not, try another 1/2 turn.

Still no idle?

Turn the screw back where it was (1 full turn) and then screw it OUT 1/2 turn, then if not, another 1/2 turn.

Once you have the mixture correct, the idle speed can be set with the IDLE SCREW.

Jan 11, 2014 | 2003 ATK 125 4-stroke

1 Answer

2001 Yamaha XVS 650 Dragstar carburetor adjustments


Hi, Samtburke the carburetor throttle shaft wheel has two cables the cable closest to the right side of the bike is the throttle cable and the one closest to the left side is the idle cable. Right about the middle between the two is the idle adjustment bolt it faces out towards the air filter end of the carb. The engine should be at operating temperature with the enrichener off to set the idle between 950-1050 rpm. Turn the idle adjustment bolt clockwise to increases idle speed and counterclockwise to decrease idle speed. If you have access to your air fuel mixture bolt you may adjust it as well if not there is a video below on how to gain access, make sure you start with clean or new spark plugs. Gently turn the air fuel mixture bolt clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the end, now back it out 2 full turns to establish a starting point start the engine and check the idle rpm's and adjust the idle adjustment bolt accordingly for 950-1050 rpm if necessary, adjust the air fuel mixture bolt 1/4 turn at a time and let the engine settle for about 10 seconds, clockwise for a leaner mixture and counterclockwise for a richer mixture you are seeking the highest rpm your air fuel mixture bolt can acquire without going past 3 full turns from bottom then readjusting the idle adjustment bolt back down to 950-1050 rpm If you can not detect any rpm change and can not stall the engine by turning the air-fuel mixture bolt all the way in then your pilot/low-speed jet is too big. Final adjustment should be made with a clean air filter mounted to the carburetor. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Pilot Mixture Screws Star 1100 Wiki Knowledge Base
Synching the Star Carbs
http://braindump.donfick.com/media/9d/Yamaha%20v-Star%20650%20Shop%20Manual.pdf
OEM parts for Yamaha
YAMAHA XVS650 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

May 27, 2013 | 2001 Yamaha XVS 650 Dragstar Classic

1 Answer

How do I set the Idle mixture adjustment on my 2002 Yamaha V Star Classic. Is there an initial setting to get the engine to start.


Hi, Anonymous it should be noted I am not allowed to use the word "SCR*W" as Fixya considers it profane. The carburetor throttle shaft wheel has two cables the cable closest to the right side of the bike is the throttle cable and the one closest to the left side is the idle cable. Right about the middle between the two is the idle adjustment bolt. It faces out towards the air filter end of the carb . The engine should be at operating temperature with the enrichener off to set the idle between 950-1050 rpm. Turn the bolt clockwise to increases idle speed and counterclockwise to decrease idle speed. If you have access to your air fuel mixture bolt you may adjust it as well if not there is a video below on how to gain access, make sure you start with clean or new spark plugs. Gently turn the bolt clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the bolt, now back it out 2 full turns to establish a starting point start the engine and check the idle rpm's and adjust the idle bolt accordingly for 950-1050 rpm if necessary, adjust the A/F mixture bolt 1/4 turn at a time and let the engine settle for about 10 seconds, clockwise for a leaner mixture and counterclockwise for a richer mixture you are seeking the highest rpm your A/F bolt can acquire without going past 3 full turns from bottom then readjusting the idle bolt back down to 950-1050 rpm If you can not detect any rpm change and can not stall the engine by turning the A/F bolt all the way in then your pilot/low-speed jet is too big. Final adjustment should be made with a clean air filter mounted to the carburetor. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Pilot Mixture Screws Star 1100 Wiki Knowledge Base
2001 STAR 650 VANCE HINES TWEAK IDLE
98 00 Yamaha XV650 Star Service Manual XVS650 Moto Data Project
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2003/LIT-11626-16-05_22.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Mar 06, 2013 | 2002 Yamaha V Star Classic

1 Answer

1997 Kawasaki VN 1500 Vulcan Classic how to adjust the air-fuel mixture screw


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
98 1500 Classic Mixture Screw Adjusting Kawasaki Vulcan Forum Vulcan Forums
Pilot Air Fuel Screw Adjustment Explained
Kawasaki VN1500 Service Manual
OEM Parts for Kawasaki
1997 Kawasaki Vulcan 1500 Classic Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e



Jun 08, 2012 | 1997 kawasaki VN 1500 Vulcan Classic

1 Answer

2001 Kawasaki VN 800 Vulcan Classic how to adjust the air-fuel mixture screw


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
how to adjust carb 05 vulcan 800 Kawasaki Vulcan Forum Vulcan Forums
Fuel air mixture screw
Kawasaki vn 800 classic Service Manual
OEM Parts for Kawasaki
2001 Kawasaki Vulcan 800 Classic Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e



Apr 14, 2012 | 2001 kawasaki VN 800 Vulcan Classic

1 Answer

98-99 Yamaha royal star, air fuel mixture screw settings, thanks


Hi, Rbmotorsport it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
7. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
8. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Royal Star Airbox Modifications
Setting carb fuel mixture screws
Yamaha XVZ13TFL Service Manual
OEM parts for Yamaha
Yamaha Royal Star XVZ13CTV Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Nov 02, 2010 | 2005 Yamaha Royal Star Tour Deluxe

1 Answer

2002 Kawasaki VN 800 A Vulcan carburetor adjustment


Hi, Bassinbob275 it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
how to adjust carb 05 vulcan 800 Kawasaki Vulcan Forum Vulcan Forums
http://www.kawasakimotorcycle.org/forum/kawasaki-cruisers/67174-vulcan-800-carb-setup-adjustment.html
KAWASAKI VN800 Service Manual
OEM Parts for Kawasaki
2002 Kawasaki Vulcan 800 Classic Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Jun 09, 2010 | 2002 kawasaki VN 800 A Vulcan

1 Answer

How to set up a carb with 31840 rebuild kit


what exactly do you want to know? Carb. mixture settings are as follows: L-head engines

Tecumseh carbs.........mainscrew 1 3/4 turns idle screw 1 1/4 turns
Walboro carbs........... mainscrew 1 1/2 turns idle screw 1 1/4 turns

L-head and OHV heavy duty engines 1 turns for both

Dec 21, 2009 | Toro Garden

1 Answer

Backfires


YOU ARE NOT BURNING ALL THE FUEL IN THE CYLINDER HTE FUEL THAT ISNT BURNT GOES IN THE EXHAUST AND WHEN YOU DEACCELERATE IT WILL BACK FIRE SO THERE IS TO MUCH FUEL GOING INTO THE CYLINDER ON CARB THERE ARE 2 SCREWS 1 FOR IDLE AND 1 FOR MIXTURE ADJUST THE MIXTURE ONE SCREW IT IN 1/4 OF TURN AND TRY IT

Aug 24, 2009 | 1999 Yamaha V Star Classic

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