I bought my Honda VTX R 1300 2006 new in Colorado and I believe i is running too lean (occasional backfires, lower performance) after moving to Minnesota. Can I adjust the carb myself somehow or should I bring it in to a mechanic?
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Re: I bought my Honda VTX R 1300 2006 new in Colorado and...
You have to get it re- jetted. I've never heard of anyone around here doing it themselves. its just relatively cheaper to get someone else to do it than to have to do it yourself. I've taken the carbs off my bike and it was a pain.
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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.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, the engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues.
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. Carburator Theory and Tuning Rich Lean Adjust VTX 1300R Honda VTX1300S Service Manual http://www.partsfish.com/page/oem-parts-for-honda Honda VTX1300C VTX 2004 Owner Manual
great news you can only win with this. i bet if you pull a spark plug and look at it, it will be white or close to it. if so your motor is lean, it's not get the right amount of gas. when you put pipes on a bike it lets more air flow and you need to jet your carb. you local bike shop can help you get a jet kit and handle the install if needed. when done right you get more performance out of it. while you are look into jets get a high flow air filter or look into a hyper charger they come a jet kit, k&n air filter and the air scoop price isn't bad rsports.com/wps/Honda_OEM/HondaMC.asp?Type=13&A=474&B=25
hello and welcome
backfiring is common associated with a lean condition. if the bike has a stock exhaust and air cleaner setup. most likely the pilot jet or main or both jets may have developed a builup. this is very very common. for this will produce the lean condition and cause popping. you may notice this more on decelleration. if slightly holding open the choke helps this a little bit. that will verify the lean condition. the carb float bowl should be removed and the jets removed and cleaned thoroughly.
if this bike does have aftermarket exhaust it is a good possibility that the jetting needs to be adjusted richer for the lean condition that the exhaust causes. thank you.