#31
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I now have a CV40, which I have molested, and a service manul, next to my recliner, in my living room. I think that makes me the subject expert.
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#32
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I have the '02 manual and couldn't find any reference to that screw, much less the adjustment.
I was going to wait 'till I got home to post this, and I'll make a more complete argument when I do. But I'll give you something to chew on. I think I'm going to leave the stock can installed and replace the stock element with a high flow K&N element. The reason is, and I believe it, HD engineered the stock can to produce torque in the idle to 4000 rpm range. My bikes rarely see 4 grand, if ever. I couldn't care less what happens over that cause I NEVER run it that high. I'm the short shift king. Tach usually swings between 2 and 3, 3500 if I'm feeling frisky. I like what my bike does now, I just want more of it.
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Dan '08 Ultra S&S SPO's |
#33
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I doubt, the manual reference the screw, since it covered. As for air filter, I have no idea on the housing. But changing element is good.
The HD one I bought in 07 fell apart in months. The K&N HD used to sell, that I bought in 04, is still good. |
#34
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" A PiRaTeS Life for Me "
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#35
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dan, I think I have all these parts still:
http://www.harley-performance.com/stage-1-carb-kit.html I can check at home if you want me too.....I needed the ez mixture screw and those parts but I bought 1 for the dyna and 1 for the rk, long story, I never used 1 set.....I can give you a good deal on it.
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BAAAA BAAA BAAA "Blame Russ in 2012" "Can We Still Blame Russ in 2013" who's to blame in 2014? OH THIS IS SO NOODLES FAULT Chitty Chitty |
#36
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Dan, I haven't read Minton's article so I don't know what he tells you about idle tuning. I'll run through what's worked for me over the last 30 years of dirt and street bike tuning.
Pilot jet idle-1/8 throttle Needle- 1/8-3/4 throttle main jet- 5/8-full throttle This gives you an idea of where your need to adjust. Pops through carb when accelerating-lean Pops through exhaust on deceleration-lean Plug reading only works if you use a fresh plug, start the bike up and make a full throttle run then shut down and coast to a stop without idling. Idle screw/pilot jet adjustment Warm up the bike thoroughly. Set idle speed as desired Start with idle mixture screw 2 turns out. Open the screw slowly until you detect a change in the sound of the engine. Your enriching the mixture so the engine will start to sound somewhat blubbery(don't know what other word to use, but the engine will not sound crisp). Shut off the engine and screw in the idle screw counting the number of turns until SEATED, do not overtighten, just seat the screw. Open the screw back to your starting point. Restart the engine and turn the screw IN until the engine starts to slow or stumble SLIGHTLY. Shut off engine and screw in the idle screw counting turns again. Split the difference between the low and high setting and this should be within a quarter turn of perfect. This will change with weather and altitude. Colder weather will probably require opening the screw up 1/8-1/4 turn and closing the same amount for hotter than normal weather. Higher altitude will require closing the screw about 1/4 turn for every 2500 feet above the baseline altitude you tuned at. If you look in the Dennis Kirk catalog they list a long mixture screw with a knurled knob for your carb. Makes adjusting mixture much easier to do. Write down your setting once you get it where your happy. This way if you change for altitude and weather you can always reset if it seems you got to far away from your baseline. Needle adjustment is much more subjective, you just have to ride the bike and see how it responds. If you get poor mileage after tuning it's most likely the needle. One clip position can make a 5-7mpg difference in fuel economy. Generally if the bike seems to be running hotter than expected your probably lean.(lower the clip on the needle one position which raises the needle up and richens the mixture quicker as you open the throttle) If the engine seems boggy/blubbery on acceleration your probably rich.(raise the clip one position on the needle) Carb farts when opening the throttle can be either slightly lean on the needle or idle mixture or a slow to open accelerator pump or rider error. You almost can't avoid carb farting if you tend to try to release the clutch which loads the engine BEFORE you start to raise the rpm. The CV carb design uses engine vacuum AND intake velocity to control mixture so loading the engine early without raising rpm causes a high vacuum/low air velocity, so the slide slams open but the intake velocity is insufficient to pick up enough fuel and the mixture goes lean causing the stumble and carb fart. Your main jet is the least important change as far as everyday ridability. You will rarely use the main jet. Probably 5% or less of the time you are using the main jet. The only real way to tell if you need to change the main jet is to check the plugs and make some acceleration runs to see if the bike pulls hard through out the entire range of throttle opening or if it feels like it loses acceleration as you get into the main jet. Using this method on the wife's XL1200 I've gotten her bike 54mpg highway really good acceleration and no carb farts or decel popping. I'd expect a big twin to produce at least 45 mpg highway. Joe
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ISAIAH 6:1-9 ____________________________________________ for Dana Separated at birth? You decide
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#37
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When tuning my 98", I over jetted. When lefting off the gas, the bike was erieily silent. I like the popping, bah-bah-bah. But I am weird.
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#38
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Quote:
__________________
Tim Ancient '79 FXS w/ probably about the same HP as a tractor Equally ancient '79 Massey Ferguson 255 Somewhat dilapidated, yet functional, Kubota L2500 '20 Branson 3620 '18 Ram 3500 Diesel '02 Wrangler X, 4" lift on 33 x 12.50s Wilderness Systems Tarpon 140 Felt Nine 50 Killin' more bees than Monsanto . . |
#39
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Minton on carb jetting:
http://www.americanrider.com/output.cfm?id=1021951 Quote:
Another article from Minton: http://www.americanrider.com/output.cfm?id=1815121 Quote:
http://www.americanrider.com/output.cfm?id=1674757 Quote:
As I said earlier, I like his philosophy and think he's right. I sum it all up by saying, a stock carb is close to right and only needs minor adjustments to eliminate the lean condition. As it stands, my Dyna runs pretty good and I do not want to turn my bike into a fuel guzzler by over jetting. Minton says this carb setup will run almost any air cleaner/exhaust combination. My thought here is try it his way. What have I to lose? If it needs more, I can do more. It seems to have worked for BigSwede and TalonChief. 'Zerk says he over jetted using a jetting kit just as Minton says will happen. While I liked the article 'Zerk referenced, I'm of the opinion it's over kill. I'd like to try the Minton set up with a set of Andrews 21 cams as well. But we'll discuss Minton's version of a torque motor after we hash out the jetting. What say you, Joe...anybody else? I'd like some real debate on this if we have dissenting opinions. Thanks all. Dan
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Dan '08 Ultra S&S SPO's |
#40
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Quote:
The article by Minton, loses me when he says to start at 1 turn out, when mine came from factory already at 1 3/4. Unless I misread it. You can change jets on the bike, so not a big deal. I suspect, you won't see the difference, other then dyno. I know I am not that sensitive. |
#41
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Sorry, my bust.
Here he says "Remove the soft aluminum plug covering the idle mixture screw. Back the screw out to slightly richen the idle mixture (1/2 to 1-1/2 turns will do it)" which I take to mean an additional 1/2 to 1-1/2 from the stock setting.
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Dan '08 Ultra S&S SPO's |
#42
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Quote:
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Dan '08 Ultra S&S SPO's |
#43
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I got plenty of time to reply to emails, but can't seem to find enought time to sit and read |
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Dan, I think I pretty much agree with and said the same thing as Minton. ONLY change the pilot jet if your final adjustment will be MORE than 2.5 turns(go larger) out OR less than 1.5 turns(go smaller). If your still running an 88" then the main is probably fine. Be careful with the needle clip position as I said before this can really make or break your fuel mileage. Wife's sporty went from 43-45mpg up to 50-53mpg by raising the clip one postion(drops the needle and leans the mix). If you go back and read the second article of Minton's that you quoted, specifically the last couple paragraphs he sums up pretty much the same as I did.
Joe
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ISAIAH 6:1-9 ____________________________________________ for Dana Separated at birth? You decide
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#45
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Yea, I thought it was about the same. It's still 88". For the time being it will remain that way.
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Dan '08 Ultra S&S SPO's |
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