Question about 1997 Honda VT 600 C Shadow

1 Answer

1997 Hoda VT 600c one mixture screw makes no changes when adjusting, engine boggs on acceleration and backfires.

Can adjust one side but the other has no effect on the engine idle, need to know what to check to make corrections.

Posted by on

  • Troy Mar 31, 2014

    I purchase this bike used, the previous owner installed drag pipes but did not rejet the carbs. I purchase new jets and installed them. The motor idles and starts extremely well with out the choke. If you accelerate very slowly the motor seems to respond well with a few small backfires but if you accelerate at a normal rate it seems as though there is not enough fuel and the engine slows down with alot of backfiring. I have installed new jets and shims on the metering rods and new plugs gapped at .035, but still the same thing. the floats seem to be adjusted correctly at just ove 1/4". Did not know exactly how to test the fuel pump.

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Champion:

    An expert who has answered 200 questions.

    Cheetah:

    An expert who has answered 20 or more questions within one hour.

  • Honda Expert
  • 286 Answers

Sync the carbs, and Troy, maby you just need to clean the carbs, one of the air lines in the carb is clogged or you have a bad diaphragm.

Posted on Apr 01, 2014

  • 3 more comments 
  • Troy Apr 01, 2014

    Where can I buy the gauges to do the carb sync, I have never seen one for motorcycles or can I use two vacuum gauges.

  • Ale? Ogrin Apr 01, 2014

    you can buy them here

  • Ale? Ogrin Apr 01, 2014

    Add a Commenthttp://www.ebay.com/itm/2-Carb-Carburetor-Synchronizer-Universal-Set-For-Motorcycle-/390657527439?pt=Motorcycles_Parts_Accessories&hash=item5af500ce8f&vxp=mtr

  • Ale? Ogrin Apr 01, 2014

    or, you can make it https://www.youtube.com/watch?v=0nKaGEML...

  • Troy Apr 01, 2014

    Thanks this helps a lot.

×

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Ad
ginocussen
  • 216 Answers

SOURCE: honda vt 750 backfires

First check all spark plugs(NGK are a good brand) / HT leads / plug caps. Secondly, Check that the valves are properly gapped - if they are tight they will leak the cylinder gases past the valve(s) and this will cause a misfire. A losse or leaking manifold will also. if you have aftermarket pipes then it may need to be rejetted to suit. If you got them at a dealer they will know the right jets. I couldnt find an english manual but here is a german on that may help with diagrams etc... Good luck. Rate if good.
Thanks

http://www.carlsalter.com/download.asp?fileid=072111110100097095086084055053048095067045067050086095039057055095040103101114109097110041046112100102

Posted on Mar 26, 2009

  • 91 Answers

SOURCE: engine will turn over but will not continue to run

the fuel filter is in the tank on top of petcock that bike has a vacum operated petcock(fuelvalve)if the vacum hose is bad no fuel flow check the back of the fuel valve for a small hose that goes to the manifold make sure it is good put vacum on the hose wile hooked to the fuel valve and make sure that gas runs out of the hose give me a rate please hope this helps

Posted on Jan 03, 2009

Thunder55
  • 318 Answers

SOURCE: fuel mixture screw

Begin by screwing the mixture screw in all the way until it stopps,,,but ONLY JUST STOPS,,,,,DONT FORCE IT,,,then look at the top of the screw slot,,and call that 12 oclock,,,now turn the screw out to you three full turns going through 12oclock,,that means 12 to 12 is one turn.

then start the bike,,,finish your adjustments now by slowley turning the screw outwards until the engine starts to misfire,,,at this point turn the screw back in one half to three quarters of a turn.Now you have the mixture set roughly.
For fine tuning,, you need to use a monometer while turning the mixture screw
Best of luck...

Posted on Jan 19, 2009

  • 28 Answers

SOURCE: 1997 Honda Magna VF45c 750 clutch adjustment

Did you do an oil change recently? Sometimes a motor cycles clutch shares the oil with the engine and a different kind of oil then the bike requires will cause the clutch to slip. This happens alot especially if someone switches to some types of synthetic oil when the bike had regular oil before the oil change.

Posted on Jun 24, 2009

  • 10 Answers

SOURCE: need to adjust my honda shadow 500 vt carburator's

start by synchronizing your throttle plates. Honda calls the next step the "idle drop procedure". u need to know if you have fuel adj. screws or air adj. screws. fuel screws will be on engine side of carb slide, air screws will be on airbox side of carb slide. start leaning out mixture, (turn in fuel screw, turn out air screw. idle will increase so keep adjusting idle back to spec.after each turn if needed. Adjust about 1/4 to 1/2 turn at a time on each carb until there is no change in idle, then richen up mixture by one half turn. If u sync throttle plates first then follow this procedure, there should be no hesitation when you "blip" the throttle, and after revving it should return to idle smooth,

Posted on Apr 09, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a Briggs & Stratton Vanguard 16 HP motor. It idles fine and it runs OK at high RPMS. But it backfires thru the carburetor during accelerating. Any suggestions?


On some float-type carburetors, you can adjust the air-fuel mixture and engine speed at idle. Check for an idle speed screw designed to keep the throttle plate from closing completely, and an idle mixture screw that limits the flow of fuel at idle. If your carburetor contains these screws, proceed below.
  1. With the engine off, remove the air filter and air cartridge.
  2. Locate the idle mixture screw and turn it clockwise until the needle lightly touches the seat. Then, turn the screw counterclockwise 1-1/2 turns.
  3. If your carburetor has a main jet adjustment screw at the base of the float bowl, turn the screw clockwise until you feel it just touch the seat inside the emulsion tube. Then, turn the screw counterclockwise 1 to 1-1/2 turns. Replace the air cleaner assembly and start the engine for final carburetor adjustments.
  4. Run the engine for five minutes at half throttle to bring it to its operating temperature. Then, turn the idle mixture screw slowly clockwise until the engine begins to slow. Turn the screw in the opposite direction until the engine again begins to slow . Finally, turn the screw back to the midpoint.
  5. Using a tachometer to gauge engine speed , set the idle speed screw to bring the engine to 1750 RPM for aluminum-cylinder engine or 1200 RPM for engine with a cast-iron cylinder sleeve.
  6. With the engine running at idle , hold the throttle lever against the idle speed screw to bring the engine speed to "true idle." Then, repeat the idle mixture screw adjustments from Step 4 to fine-tune the mixture .

May 02, 2017 | Briggs & Stratton Briggs Stratton Intek V...

1 Answer

How do i adjust the carburetor


there will be a plug at the side top of the fuel bowl that you remove to check and adjust the float level while running
the float level is adjusted by the bolt at the top of the cover above the needle and seat adjust until the fuel is level with the threads of the plug
screw that mixture screw/s in all the way then back out 1 1/2 turns
start the engine and adjust the idle speed by the screw on the accelerator lever
set to around 800 rpms
adjust the mixture screw in until the rpms start to slow
now screw the mixture out until the rpms again slow
mixture adjustment is achieved by turning the screw back in 1/2 the turns that you used to turn it out from the slow in position to the slow position out
again adjust the engine rpms by the accelerator screw to the 800 rpms
most engines idle between 700 and 850 rpms unless and efi engine which have around 850 -950 rpms range

Nov 19, 2015 | Holley 1986 86 Dodge D150 Fuel Pump-1986...

1 Answer

2004 Honda VT 1100 C2 Shadow Sabre carburetor adjustment


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 please click on the blue links below. Good luck and have a wonderful day.
1995 VT1100C2 Air Fuel Mixture Pilot adjust
VT1100 Mixture Screw Location
Honda Shadow VT1100 Owner Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda shadow vt1100 Owners Workshop Manual

Apr 27, 2014 | 2004 Honda VT 1100 C2 Shadow Sabre

1 Answer

2003 Honda VT 750 C2 Shadow carburetor adjustment


Hi, John 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.
Adjusting the Mixture Screws
Honda Shadow VT700C Running Lean Fix Pilot Jet Needle Shim
Honda 1998 VT750C Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda VT750C Owner Manual

Apr 13, 2013 | 2003 Honda VT 750 C2 Shadow

1 Answer

How to adjust fuel mixture on a 1986 Honda VT500 Shadow


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 please click on the blue links below. Good luck and have a wonderful day.
85 VT500C Fuel Mix Adjustment
Adjusting the Mixture Screws
http://www.cycleterminal.com/Service-Manuals/Honda-VT500C-Shadow-Service-Manual-English.pdf
http://www.partsfish.com/page/oem-parts-for-honda
http://mybikemanuals.com/honda/honda-vt-owners-manuals

Jun 09, 2012 | 1986 Honda VT 500 C Shadow

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

Jun 08, 2012 | 1997 kawasaki VN 1500 Vulcan Classic

1 Answer

1994 Honda VT 600 C Shadow how to adjust the air-fuel mixture


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.
idle screw air fuel mix
Carburetors
Honda VT600C Shadow VLX Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda VT600C Owner Manual

Apr 02, 2012 | 1994 Honda VT 600 C Shadow

1 Answer

I have a 2007 honda rebel and when you throttle it boggs down when i let up on the throttle it runs right it has backfired a couple of times and it now dies almost immediately after you start itany idea?


you probably just need to adjust your air fuel mixture and idle screws. try leaning out your mixture screw a little bit and then adjust your idle screw accordingly.

May 14, 2010 | Motorcycles

1 Answer

Need to adjust my honda shadow 500 vt carburator's fuel/air mixture


start by synchronizing your throttle plates. Honda calls the next step the "idle drop procedure". u need to know if you have fuel adj. screws or air adj. screws. fuel screws will be on engine side of carb slide, air screws will be on airbox side of carb slide. start leaning out mixture, (turn in fuel screw, turn out air screw. idle will increase so keep adjusting idle back to spec.after each turn if needed. Adjust about 1/4 to 1/2 turn at a time on each carb until there is no change in idle, then richen up mixture by one half turn. If u sync throttle plates first then follow this procedure, there should be no hesitation when you "blip" the throttle, and after revving it should return to idle smooth,

Apr 08, 2010 | 1986 Honda VT 500 C Shadow

2 Answers

My 1998 honda aero 1100, backfiring on acceleration


your problem is going to lie in the carbs. rebuild them and clean the jets. it will be like new after that.

Jul 14, 2009 | 1998 Honda VT 1100 C3 Shadow Aero

Not finding what you are looking for?
1997 Honda VT 600 C Shadow Logo

154 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4825 Answers

yadayada
yadayada

Level 3 Expert

79123 Answers

bazzz7071
bazzz7071

Level 2 Expert

342 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...