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1100russ
CB1100F
Joined: May 17, 2010
Posts: 2982
Location: williamsburg, ohio
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Posted:
Tue Sep 03, 2019 3:16 pm |
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Fuck an airbox! Biggest pita on these bikes. Good job dude. |
_________________ CB1100F The Hot Rod
CB985F The Track Bike
ST1100 Commuter Bike
XR100 Teaching Bike
Ducati 750 SS Track Bike
CB360 Little Honda |
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jacksondee
Hawk
Joined: Jul 30, 2013
Posts: 302
Location: Chicago
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Posted:
Tue Sep 03, 2019 3:20 pm |
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I'm fascinated that the difference between 100 and 120 is what, .2mm? And that's what makes a significant difference? Has anyone ever actually verified that carbs don't run on some kind of black magic? |
_________________ 1981 CB750F
2003 GSX-R750 (track bike) |
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genesound
Red CB1100F
Joined: Feb 20, 2006
Posts: 11926
Location: Studio City, California
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Posted:
Tue Sep 03, 2019 4:32 pm |
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melchiro
Silver CB900F
Joined: Aug 10, 2003
Posts: 1518
Location: Mill Creek, WA.
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Posted:
Tue Sep 03, 2019 8:03 pm |
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jacksondee wrote: |
I'm fascinated that the difference between 100 and 120 is what, .2mm? And that's what makes a significant difference? Has anyone ever actually verified that carbs don't run on some kind of black magic? |
.2mm is A HUGE amount, when you are measuring the amount of gasoline flowing through the ports...
1100russ, I’m on the same boat as you, concerning the air box. LOL
Bernoulli, that fairly sums it up, eh.. |
_________________ 1979 Modified CBX
1982 Modified CB-750/1100F
1983 Modified CB-750/1123F Track bike
1980 GS1000GT Project
1972 CB500 Four K1 Project |
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pickandpray
Twinstar
Joined: Apr 04, 2009
Posts: 49
Location: Northwest Arkansas
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Posted:
Sun Dec 15, 2019 2:46 pm |
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sorry for reviving this thread, but I didn't see anyone recommend the number of turns for the air mix screws with these jetting changes and 38 slow? |
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jacksondee
Hawk
Joined: Jul 30, 2013
Posts: 302
Location: Chicago
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Posted:
Mon Dec 16, 2019 7:40 pm |
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pickandpray wrote: |
sorry for reviving this thread, but I didn't see anyone recommend the number of turns for the air mix screws with these jetting changes and 38 slow? |
I'm pretty sure I'm at the recommended 2.5 turns out. I have the exact set up as you with the one-size-larger 38 jet |
_________________ 1981 CB750F
2003 GSX-R750 (track bike) |
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djf18374
Silver CB750F
Joined: Oct 14, 2016
Posts: 573
Location: Richmond, VA
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Posted:
Wed Jul 21, 2021 1:09 pm |
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I searched around a bit on here for recommendations on jetting for Pods. Figured I would share my success here for others to have as a data point:
1983 CB1000C with the stock carbs for that year, Uni-foam pod filters that do not block the carb inlet ports.
Pilot Jets: 38
Needles: CBX needles
Primary Main: 72
Secondary Main: 130
Turns on Mix Screw: 1.25
It is still a little rich at idle, so I'm going to assume I could go in further with the mix screws. They still have the little flag things on the screw so I cannot go in any further at this time.
Hope this helps someone else to succeed without the airbox. |
_________________ 79 CBX (silver)
81 CB900F (silver)
83 CB1100F (red) |
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smurdoch
CB1100F
Joined: Jan 22, 2004
Posts: 3164
Location: St. Catharines, Ontario
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Posted:
Thu Jul 22, 2021 1:19 am |
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genesound
Red CB1100F
Joined: Feb 20, 2006
Posts: 11926
Location: Studio City, California
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Posted:
Thu Jul 22, 2021 1:28 am |
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pickandpray wrote: |
sorry for reviving this thread, but I didn't see anyone recommend the number of turns for the air mix screws with these jetting changes and 38 slow? |
Chi, old post, but once you've removed the airbox and changed a bunch of other stuff to compensate, I'd recommend you set your mixture using exhaust gas analysis or use a Gunson Colortune. Too many variables at that point to just say set it like this IMO. |
_________________
We don\'t see things as they are
we see things as we are
Viton Valve Stem Seals
12.9 Cam Holder Bolts
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phoenix655
Twinstar
Joined: May 08, 2019
Posts: 33
Location: BC
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Posted:
Mon Oct 03, 2022 11:30 pm |
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Does the bike run smoothly at low RPM/load just cruising around with the pods and this jetting? |
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djf18374
Silver CB750F
Joined: Oct 14, 2016
Posts: 573
Location: Richmond, VA
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Posted:
Mon Oct 03, 2022 11:48 pm |
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phoenix655 wrote: |
Does the bike run smoothly at low RPM/load just cruising around with the pods and this jetting? |
Are you asking the question of me? |
_________________ 79 CBX (silver)
81 CB900F (silver)
83 CB1100F (red) |
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