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ammpro
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« on: October 01, 2015, 10:33:19 AM » |
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Seems common knowledge that valks run rich, and that OEM needles are not adjustable. So, I thought I would check mine to see if it has OEM needles or aftermarket ones. What I discovered is that my OEM needles have a shim under the needle head, probably .015 thick.
My question to you carburetor Gurus: Is it OK to remove that shim? Actually, I moved the shim to on top of the needle head to maintain good contact with the spring, but I don't want to make a permanent change without some input. Seems this will lean things up just a tad.
Thoughts???
Frank
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Frank
Have fun. Be safe. Always set a good example.
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bentwrench
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« Reply #1 on: October 01, 2015, 02:49:02 PM » |
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That may be the "radio shack washer" jet kit many of us tried years ago.Your not the first owner are you?
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ammpro
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« Reply #2 on: October 01, 2015, 02:56:14 PM » |
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I believe I am the 3rd owner.
The placement of that shim (0.014"), where I found it, would enrich the mixture.
Are you implying that it is not there from the factory?
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Frank
Have fun. Be safe. Always set a good example.
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98valk
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« Reply #3 on: October 01, 2015, 04:40:38 PM » |
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one shim is stock from the factory.
valkyrie's do not run rich. only the main jet might be slightly rich depending on location of ownership. Honda doesn't know where the bike will/how/want temps what elevation be used. so they jetted the bike a slight richness to protect the engine, but a/f ratio they used is not considered rich.
perfect jetting is only good for +/- 25F
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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ammpro
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« Reply #4 on: October 01, 2015, 04:58:36 PM » |
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Yeah, I checked the parts breakdown and saw that.
Mine seems to run rich. Expected at 3500 to 7000 feet where I typically ride, but also seemed rich at sea level on this summer's ride.
So many members have commented on how rich they tend to run...but that also seems incorrect if Honda passed emissions testing...
So, what are your thoughts on removing that shim for higher altitude riding?
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Frank
Have fun. Be safe. Always set a good example.
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WintrSol
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« Reply #5 on: October 01, 2015, 05:22:38 PM » |
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While that will lean the mixture somewhat, it will only do so in the intermediate throttle range; as you near open throttle, the main jet takes over, and the mixture is rich again. Plus, that shim protects the parts from rubbing together. IMO, it would be better to get a selection of smaller main jets, and choose the set that works best.
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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98valk
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« Reply #6 on: October 01, 2015, 05:35:39 PM » |
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Yeah, I checked the parts breakdown and saw that.
Mine seems to run rich. Expected at 3500 to 7000 feet where I typically ride, but also seemed rich at sea level on this summer's ride.
So many members have commented on how rich they tend to run...but that also seems incorrect if Honda passed emissions testing...
So, what are your thoughts on removing that shim for higher altitude riding?
manual requires idle mixture screw adjustment for high altitude. when steady state cruising down the road only about 1/8 throttle is being used and that is mainly the pilot jets. if one accelerates then the needles come into effect, u don't want to be lean there esp when under load, unless u want a piston pin inspection hole. IMO don't remove the shim. close the mixture screw 1/4 to 1/2 turn closed at a time till u get what u want. |
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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ammpro
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« Reply #7 on: October 01, 2015, 08:45:44 PM » |
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Thank you!
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Frank
Have fun. Be safe. Always set a good example.
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #8 on: October 02, 2015, 09:27:30 AM » |
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Your needles appear to be as Honda[ Keihin] wants them. I would recommend against messing with them.
At the altitudes you are riding and since you think you are running rich, you probably are. The fix I'd recommend is the same as Honda. Turn each pilot in 1/2 turn. Then try it. Since you are not the original owner, who knows where they are set without checking it yourself. But, turning them the first 1/2 turn then maybe subsequent turns at 1/4 turn should get you where you want to be.
If you have never played with those screws and the screws have never been slotted, then, you're in for a lot of fun and creative language.
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« Last Edit: October 02, 2015, 09:29:56 AM by Patrick »
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ammpro
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« Reply #9 on: October 02, 2015, 09:29:32 AM » |
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I appreciate all the feedback, and will heed your advise.
Thanks, again, to all.
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Frank
Have fun. Be safe. Always set a good example.
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ammpro
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« Reply #10 on: October 02, 2015, 02:20:37 PM » |
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Referencing the carburetor parts breakdown, which adjustment screw are you guys talking about?
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Frank
Have fun. Be safe. Always set a good example.
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #11 on: October 03, 2015, 03:32:48 AM » |
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Referencing the carburetor parts breakdown, which adjustment screw are you guys talking about?
Bottom of carb, screw with the ' D ' shaped head. |
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98valk
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« Reply #12 on: October 03, 2015, 04:03:42 AM » |
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this makes all idle mixture screw adjustments easy. I've been using one for yrs. 07MMA-MT3010B WRENCH PILOT SCREW here is a pic, most sites don't show what it looks like. http://www.cmsnl.com/products/tool-pilot-screw-wre_07mmamt3010b/#.Vg-6AG496vE |
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Logged
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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98valk
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« Reply #14 on: October 03, 2015, 05:36:03 AM » |
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$ 184  that's an england site and the only one that showed a pic. partszilla and others are around $70 I bought mine in '00 for $40. well worth the $ and ease of use. |
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #15 on: October 03, 2015, 05:48:34 AM » |
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I made one and used it once just to initially get the pilots out.
I cut a slot in them, add a dab [ technical term] of never-seize and then use a normal screwdriver.
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ammpro
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« Reply #16 on: October 03, 2015, 07:00:41 AM » |
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I purchased a hex drive 'D' bit, online, for $5.00. http://www.ebay.com/itm/161745747603Thought that might be the adjustment. Bit fits and those are easy to reach. THANKS!!! |
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« Last Edit: October 03, 2015, 07:04:53 AM by ammpro »
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Frank
Have fun. Be safe. Always set a good example.
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