12-13-2016, 02:34 PM | #31 | |
Join Date: Apr 2016
Posts: 79
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12-24-2016, 05:43 PM | #32 |
Join Date: Apr 2016
Posts: 79
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I had a chance to do some more research on the issue and now believe the jetting changes I made are appropriate (117 Main).
I have 2 identical bikes, a white one and a black one. The black one was the one that had the problem. I have since rejected the white one to be identical to the black one and it runs perfectly, without any hiccups. I have taken it on some sustained (indicated) 65 mph runs with no problems.This leads me to believe that the jetting is not the problem with the black bike which still hiccups. So the next likely problem would be the installed air injector emission control.I know there is a permanent way to block it off with a plate but does anyone know if you can temporarily disabled it by simply disconnecting and plugging the vacuum port and hose? I would like to isolate that as being a problem before I take any further measures. Thanks again for the input. |
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12-24-2016, 05:57 PM | #33 | |
Join Date: Jan 2012
Location: ChCh , NZ
Posts: 2,266
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one type is hole dia... the other is hole area.... what type were you useing....???
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12-24-2016, 06:04 PM | #34 |
Join Date: Apr 2016
Posts: 79
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By the way - if anyone needs an extra 112 jet let me know because I have 2 of them I won't use. They would probably help wake up a stock bike or a bike with a pipe that lives at higher altitude. Free to the first 2 requests.
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12-24-2016, 07:17 PM | #35 | |
Join Date: Jun 2016
Location: Colorado
Posts: 1,107
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12-25-2016, 12:23 AM | #36 |
Join Date: Apr 2016
Posts: 79
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Cool, I will give that a try this week.
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12-25-2016, 01:08 AM | #37 |
Join Date: May 2016
Location: Hacienda Heights, Ca
Posts: 281
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The only way to guarantee it's not flowing is to seal off the connection. Nothing permanent or difficult, just put a cap on instead of the hose or something in the hose to seal it off. Not the little vacuum hose, the one at the head that actually feeds air to the port, this will eliminate all possibilities of air flowing into the exhaust. While I doubt that the air injection does anything to performance, I see the potential for it to rob some of the scavenging effect during valve overlap and change tuning effects; haven't tested the theory. If there was a plate installed where the gasket goes it would maximize the blocking of pulses a little more than a cap/plug on the hose fitting, but probably an unmeasurable difference. Ideally the air hole would be filled at the exhaust port so that it's not existent, but that's much more involved.
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12-25-2016, 01:12 AM | #38 |
Join Date: Apr 2016
Posts: 79
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Good point, I will take the extra precaution.
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12-25-2016, 01:14 AM | #39 |
Join Date: May 2016
Location: Hacienda Heights, Ca
Posts: 281
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Never heard of this. Do you have a link to some reference so I can read about it? The area would be hugely different than diameter and should be relatively easy to spot when looking at bits, but I'd like to learn about it.
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12-25-2016, 01:30 AM | #40 |
Join Date: May 2016
Location: Hacienda Heights, Ca
Posts: 281
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Very cool. I might, but I'll wait to see what I'm gonna do with mine.
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12-28-2016, 06:12 PM | #41 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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X2. I was definitely using bits where the diameter was referenced, as confirmed by the vernier caliper.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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12-28-2016, 08:57 PM | #42 |
Join Date: May 2016
Posts: 16
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I am having a similar issue with mine. It has only happened twice, once yesterday morning and once this afternoon, and both times in the higher gears. I am practically at sea level so I highly doubt that jetting is the issue. Aside from the jetting, any idea what it could be?
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12-29-2016, 02:09 PM | #43 |
Join Date: May 2016
Location: Hacienda Heights, Ca
Posts: 281
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I believe the stock bikes are jetted on the lean side for emissions. Being near sea level gives lots of air available and if it's cool where you are that'll add to even more available air (density) and might be enough to have you on the ragged edge of too lean.
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12-29-2016, 03:20 PM | #44 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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Definitely. I've never seen a CB come other than totally leaned out. My neighbor's new TT250 isn't too bad...and we're at 3000'. We'll end up putting a Mikuni on it anyway, just for the jetting options.
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12-31-2016, 06:00 PM | #45 | |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Quote:
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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