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06-18-2019, 10:28 AM | #1 |
Join Date: May 2019
Posts: 34
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Air injection plugs
My understanding is that the little line coming from the intake is vacuum, big line is air inlet, and pipe is injection to cylinder. I can just plug the vacuum line, and then make a plate to cover the cylinder hole, and drop the system out of the bike, right? Thanks, y'all. |
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06-18-2019, 10:38 AM | #2 |
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Join Date: Oct 2016
Location: Houma, La.
Posts: 11,707
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Yes, That is correct.
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2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
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06-18-2019, 11:19 AM | #3 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Where does the other end of the vacuum line connect?
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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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06-19-2019, 12:17 PM | #5 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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That's really cool! A vacuum nipple in that location would be useful for tuning with a vacuum gauge. I'm inclined to drill my intake tube to install a vacuum nipple for that reason.
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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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06-21-2019, 08:30 AM | #6 |
Join Date: May 2019
Posts: 34
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I have removed the air injection stuff, and there is almost no popping on decel now. I had to buy a little vacuum cap for the carb nipple, and for now I just put a cap on the pipe on the cylinder. Drew a pattern on a piece of metal to make a blanking plate, but don't have time to cut it out right now.
On a side note, the one and only neighboring house burnt last night. Unoccupied, for years, a flipper bought it last year, made it nice, listed it for too much, and now its gone. Wonder if someone will buy the property and build again. Hope not. |
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06-21-2019, 10:43 AM | #7 |
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Join Date: Oct 2016
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Happy to see it helped! Should be running good now.
I have a house next to me that has been vacant for two years. I wish it would either get bought and fixed up or just burnt to the ground. If I could afford it I would buy it and level it just to have the extra property.
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2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
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06-21-2019, 11:25 AM | #8 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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The insurance adjusters in the crowd would call that suspicious.
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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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06-18-2019, 11:45 AM | #9 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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On Q, i wanted it to look like it was there, just in case. I put a BB in the small line and a piece of all-thread in the big line.
Keep in mind, it doesn't rob power and if you're keeping your stock exhaust with cat, you may want to leave it functioning. It'll keep your cat clean. If you're going to an aftermarket muffler and no cat, disable the air injection or it will cook your muffler packing.
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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06-18-2019, 07:46 PM | #10 | |
Join Date: May 2019
Posts: 34
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Quote:
Performed a cat-a-tectomy on the stock pipe. Now I have popping on decel, with occasional backfires, and JerryHawk250 suggested removing this to help with that. |
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06-19-2019, 09:19 AM | #11 |
Join Date: May 2019
Location: Port Huron, Michigan
Posts: 637
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Did you re-jet after removing the cat? the combination of extra flow in the exhaust and the pair pumping air into it could for sure account for the popping.
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06-19-2019, 10:17 AM | #12 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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Definitively going to want to disable the air injection then, unless you have a deep hatred for your muffler packing. ;-)
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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06-18-2019, 05:27 PM | #13 | |
Join Date: Jun 2016
Location: Hell
Posts: 2,408
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Quote:
There is a blanket I’ve bought in China before |
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06-18-2019, 07:47 PM | #14 | |
Join Date: May 2019
Posts: 34
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Quote:
Thanks for the info! |
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07-20-2019, 03:18 PM | #15 |
Join Date: Apr 2019
Posts: 2
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Removed mine the other day and covered it with a blank and plugged the airbox nipple and the intake nipple. No more popping at all.
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