| Author |
Message |
    
Buellistic
| | Posted on Monday, August 04, 2014 - 11:18 am: | 
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They raise the needle to make it a little more RICHER ... |
Vsingle
| | Posted on Monday, August 04, 2014 - 04:13 pm: |
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Okay, so the needle is Accessed from the top side (diaphragm side) of the carb? I pull the needle out, then before putting it back in I slide .050 thick of #4 washers onto the needle and reinstall? Correct? |
Gearheaderiko
| | Posted on Monday, August 04, 2014 - 04:30 pm: |
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Yes. |
Vsingle
| | Posted on Monday, August 04, 2014 - 07:26 pm: |
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Main jet installed by PO was 165. Slow jet was 45. Idle mixture was 3 turns out.
The needle on mine is interesting. It has 6 grooves around the big end, spaced about .050 apart. There is an external retaining ring set in the middle groove. Is this an aftermarket needle? If this is standard, then why use washers to shim the needle? Why not just move the retaining ring? |
Ezblast
| | Posted on Tuesday, August 05, 2014 - 02:22 am: |
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move ring one up, then use washers. get 175 jet - you are way too lean.
EZ |
Gearheaderiko
| | Posted on Tuesday, August 05, 2014 - 10:12 am: |
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Uh, is it a stock HD/keihen needle? If it's the aftermarket (dyno jet?) then 165 would be richer than 175. If the needle actually has a point like a sewing needle, then you shouldn't go to a 175 as it's an aftermarket kit. Stock type needles don't look as much like a sewing needle and aren't polished (like chrome).
Stock type needles should have a 4 digit letter & number stamped into the top of the ('nail') head.
Ideally, you should run the bike and see if it's running rich or lean first. This can be a very time consuming,frustrating and daunting task for the novice!! But learn it and you will unleash the awesome potential of a finely tuned carb! (It is not easy).
It's important to figure out first what needle you have.
My guess is it already has an overpriced jet kit installed and it's "fine" as is. That is however, a guess!! |
Vsingle
| | Posted on Tuesday, August 05, 2014 - 05:22 pm: |
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Do stock needles have grooves and the external retaining ring? The needle I have has a radius on the end. Maybe .004" or so. If stock needles have grooves, then the only reason I could see to use washers would be if you were on the bottom groove and wanted to pull the needle up even higher. |
Vsingle
| | Posted on Tuesday, August 05, 2014 - 08:11 pm: |
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After finding the 45 and 165 jets, and groovy needle onboard, I put in a new 45 jet, a 175 jet, and I put one .032" as washer under the needle. Left the mixture at 3 turns out.
The motor started on the first try. Idle was higher than normal. Took it for a short ride to warm up, then adjusted idle speed.
Went out for longer test ride. Motor felt great. Smooth power all the way from way down on the revs. No backfiring when rolling off or snapping throttle shut at any rpm. Likewise, twisting to full throttle seems to work smooth at any rpm. No lugging, surging, backfires, nor coughs.
First full tank burned shows 44.7mpg. Pro-series pipe returned 50-51 average mpg.
Also, I did check for the glowing header pipe last night. Only the tiniest hint of a color shift right at the header clamp. I may have imagined it. Before changing jets, the glow area was about 2.5" down the pipe. During the boot failure, it was more down the pipe. |
Buellistic
| | Posted on Tuesday, August 05, 2014 - 08:59 pm: |
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The BEST NEEDLE is the PN 27241-95 NOKK from a M2 CYCLONE !!! |
Ezblast
| | Posted on Wednesday, August 06, 2014 - 02:37 am: |
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I respectfully dis-agree - the best needle is the blue adjustable needle from the Yost tube kit - that puppy is awesome - you can really dial in where you want the power in your midrange with that puppy.
EZ |
Gearheaderiko
| | Posted on Wednesday, August 06, 2014 - 03:04 am: |
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V-single: Did the new needle look like the old needle (minus grooves and such)?
I ask because the needle and main jet may not match since some "jet kits" use their own matching needle and main jet and are not compatible with stock. Did the new main look like the old main jet?
Sure, there is a chance It might work. |
Vsingle
| | Posted on Wednesday, August 06, 2014 - 08:08 am: |
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Oh boy. Was I supposed to get a new needle? I just used what was in the carb already. I bought the jets individually; not in a kit. I also bought a 48 and 180, just to have options. 2nd tank of gas came on reserve within 2 miles of the first tank; prolly 44-45 mpg. So it's definitely getting about 10% more fuel than with previous jetting. |
Gearheaderiko
| | Posted on Wednesday, August 06, 2014 - 08:58 am: |
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Uh, not necessarily. I'm just trying to figure out if you've matching 2 different types of needles and main jets. You don't necessarily need a new needle.
if it runs good......then? |
Vsingle
| | Posted on Wednesday, August 06, 2014 - 10:13 am: |
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It seems to be running on all cylinders B-) I should have snapped a pic of the needle while it was out. Radiuses tip. May have been polished at one point; looked kinda burnished now. Smooth, but the taper was different color than straight part. Taper was silvery gray. |
Vsingle
| | Posted on Monday, September 29, 2014 - 05:50 pm: |
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The Jardine header pipe lasted almost 8,000 miles when it decided to crack right next to the hanger tab. A friend who is an excellent welder glued it back together for me last night. I had used the stock rubber mount and everything. I think this would have qualified for a warranty claim, I just didn't want to plead my case. |
Ezblast
| | Posted on Tuesday, September 30, 2014 - 04:18 am: |
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At least it won't break at the weld.
EZ |
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