Question about 2003 Honda VTX 1300 Retro

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My honda vtx 1300 R is running rich.

My honda vtx 1300 R is running just a little to rich. I would like to either increase the air intake or lessen the fuel intake which ever is the easiest. I just do not know which ajustment screw is air, or gas,when looking at the shop manual.
Thanks

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  • waynemsu71 Sep 24, 2009

    Ollie:
    Honda VTX 1300 my fuel filter is under the seat, and the carb. is mounted on the right side between the cylinders. If I remove the cover and air filter there is no adjustment screw. I think it might be under the gas tank or behind the plastic housing that is around the carb. I will get shop manual and research more. Thanks for the reply. Wayne

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Hi buddy its simple one is the idle and the over is the air mixture screw just turn it all the way in and unscrew it so many turns (says this in manual eg 2 turns out ) get back to me if not right My honda vtx 1300 R is running rich. - 264f724.jpg

Posted on Sep 23, 2009

Testimonial: "Helpful: Pointed me in the right direction. Thanks"

  • 1 more comment 
  • ollie reece-jones
    ollie reece-jones Sep 24, 2009

    hi buddy dont give me a bad rating yet i still have more info for you i will get back to you in a mo

  • ollie reece-jones
    ollie reece-jones Sep 24, 2009

    hi buddy the screw i think is based on the bottom off the carb you may need to get and aftermarket mixture screw to put in there the after market screw it longer so you can get to it get back to me if not ok buddy give me a good rating please im trying my best to get everyone happy and running on this site thanks buddy

  • ollie reece-jones
    ollie reece-jones Sep 24, 2009

    or buddy im thinking you may need this af screw to acces the mixture screw

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My ttr acts like it starting and dies i changed the spark plug just sputters longer before it dies


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2004 Honda VTX 1300 cutting out


Hi, Anonymous and the usual suspects are:
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Hi, Jeff you need to make sure you have no intake leaks by spraying some Brake Kleen, Contact Cleaner, Starting Fluid etc. around the intake manifold and seals, if the RPM's go up or down significantly then you have a leak that needs to be fixed before you can continue with the carburetor adjustment.
The engine should be at operating temperature with the choke off to set the idle between 950-1050 rpm. Turn the idle skrew clockwise to increase the idle speed and counterclockwise to decrease the idle speed. If you have access to your air-fuel mixture skrew you may turn 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 skrew clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the end, now back the skrew out 1-1/2 full turns to establish a starting point start the engine and check the idle rpm's and turn the idle skrew accordingly for 950-1050 rpm if necessary, turn the air-fuel mixture skrew 1/4 turn at a time and let the engine settle for about 10 seconds, turn the skrew clockwise for a leaner mixture and counterclockwise for a richer mixture, you are seeking the highest rpm your air-fuel mixture skrew can acquire without going past 3 full turns from bottom then resetting the idle skrew 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 skrew all the way in then your pilot/low-speed jet is too big and needs to be replaced with the next size smaller. Final adjustment should be made with a clean air filter mounted to the carburetor.
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Adjust 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.
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Hi, James if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" you're not getting enough fuel.
1. Close to 1/8 throttle is managed by the air screw and pilot/slow jet.
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Dear Sir I just purchased a used 2007 Honda vtx 1300C and it has a flat spot at low engine rpm through all gears. Are there any common issues with this engine ? The bike is all stock. Original pipes and...


Rich, there are no recurring issues with the vtx, but one thing i have seen a lot with the vtx's is when they sit around and especially when they are for sale and get started a lot with out being ridden the plugs get fouled easily. i would suggest you check and replace the plugs if they are carboned up and black. also you may want to get a fuel additive to help clean out the tank and carb, i like the lucas fuel conditioner myself.

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May be running too lean or too rich. Check the color of your plugs, black dry and sooty means they are rich, white with blisters lean.

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ever drain your carbs ? should be done seasonally . fuel filter problem, sounds like it is running out of gas.

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