running rich


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  1. #1
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    running rich

    weather sucks here in buffalo ny. mid 40's and rain. only 200 miles on bike so far anyways, I know this question has been beat to death with a VERY large stick but here goes. I have an 07 1300r with lots of goodies on it when i bought it 2 months ago. It seems to be runing a little rich. has Kury Pro-R and stock pipes although I believe they were gutted. ( a lot louder than stock) no holes drilled that i could find. bike runs great. occasional pop on decel. was worse but better after changing bad vacuum line to hyper. would like to know what to look for and how to fix . i have to assume it has been jetted . haven't pulled carb off to check yet.what is the Pair valve mod i have been reading about? How would I know if it has been done? if you guys can post links and pics or anything to help me out that would be great. Thanks in advance
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  2. #2
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    Have you pulled the plugs to verify Rich Condition?
    Decell popping can be leak in exhaust crush gaskets, LEAN condition, Leak at Pair Valve removal block off plates.
    Pair valve removal http://tech.bareasschoppers.com/engine/vtx-1300-desmog/

  3. #3
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    Paired valve is just like it sounds. It ads alot of hoses to to the system so its hard to miss. One hose does into the back of the intake (not sure where on a hypercharger...). then you will see some other hoses and reed valves connected to the top of the engine. You remove this whole system and put block off plates over the open area. The whole thing is pointless to have, it was just to pass emissions. I still havent done mine so I cant give any specifics besides saying Im sure there is a good write up on here.

    The paired valve removal will help with any decel popping but not so much with running rich. You may want to look into the Scar mod or a Factory Pro Jet Kit for that. I just did the scar mod and it helped tremendously.

    Quote Originally Posted by RandyHut View Post
    Have you pulled the plugs to verify Rich Condition?
    Decell popping can be leak in exhaust crush gaskets, LEAN condition, Leak at Pair Valve removal block off plates.
    Pair valve removal http://tech.bareasschoppers.com/engine/vtx-1300-desmog/
    And like he said decel popping would be more present in a lean condition than a rich one. If it has been jetted but not properly tuned it could be lean, if it doesnt have a jet or Scar mod its definitely lean.

    I dont know which you should do first but dont do both together. If the bike doesnt run right there are now to many reasons to diagnose. Here are some write up links.

    Scar Mod
    http://www.vtxcafe.com/showthread.php?t=3079

    Scar Video
    http://www.youtube.com/watch?v=TRgkX05P2io

    Lean/Rich Diagnose and Fix
    http://www.vtxcafe.com/showthread.php?t=12511

    Paired Valve (its for a Fury but same setup)
    http://www.furyforums.com/forum/fury...e-removal.html

  4. #4
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    pulled plugs and verified. it is running rich. popping on decel is very occasional only happened twice since replacing bad hose. like i said, I know this has been beat to death. I have spent hours reading these forums. and am trying to get links together in one place so that i can print them out. of course i would prefer not to tear my bike down cause the weather is gonna break any day now LOL. rain for the next week

  5. #5
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    Ok, you are sure it is Rich, you might want to do the PAIR removal. It will help with the decel popping.
    Now for the rich condition. Have you adjusted the A/F screw? Do you know what Jets are in the carb, including needle and shims or clip position?

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  7. #7
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    Look at link 1 and watch link 2 and do the scar mod. That will fix your Rich issue. The paired valve you cant do without block off plates so order them and do it another day. A little popping isnt a big deal.

  8. #8
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    The SCAR mod usually Richens Up a Lean Condition. With the Air Breather you have, it has probably been jetted already, andyou may or may not need to change a jet. First thing i would do is adjust the AF in a little to see what affect that has on the running, and the spark plugs. IF it continues to be rich, i would take the slide out and see what needle and shims that are in it, stock with shims or FP or DJ on some notch. Remove a shim or drop the needle lower by changeing a clip higher.

  9. #9
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    Hyper charger says to me a 65 pilot jet way to big and a 185 main jet way to small

    You should have a 58 pilot a 210 or 215 main and the clip on the needle should be 3 1/2 to 4 A/F should be around 2 turns open.

    Right now you would need to close down the A/F to under 1 turn open and you will still be rich on the low end and lean on the top end with the small main jet.

  10. #10
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    Quote Originally Posted by bkjwalker84 View Post
    pulled plugs and verified. it is running rich. popping on decel is very occasional only happened twice since replacing bad hose. like i said, I know this has been beat to death. I have spent hours reading these forums. and am trying to get links together in one place so that i can print them out. of course i would prefer not to tear my bike down cause the weather is gonna break any day now LOL. rain for the next week
    Do a Google search for a small application called "Cute PDF Writer" download and install it, then review the "Read Me File" on how to use it.

    Hint when you run the installation and it says it is finished, but says it needs an additional download tell it yes to proceed.

    Very neat little application for saving text or images on screen to a PDF document.
    It acts like a printer, but isnít. It allows you to save all the data to a file for printing later.

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