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Offline 75 super sport

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6sigma jet kit question
« on: May 18, 2015, 07:27:19 PM »
I just received my jet kit in the mail. I was looking over the instructions and the contents of the kit. They are saying to run 125's for main jets on outer cylinders 1&4 and 127.5 for cylinder 2&3. Never heard of running two different size mains. Does any body have input on this? I am very curious and would love to learn why this is? Thanks in advance
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Offline flybox1

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Re: 6sigma jet kit question
« Reply #1 on: May 18, 2015, 07:37:45 PM »
..because inner cylinders run hotter(leaner) than outer cylinders, primarily because of decreased cooling.
HONDA didn't feel it necessary, even after $$$ spent on R&D, so why bother?

What brand kit is this?
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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Offline Bodi

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Re: 6sigma jet kit question
« Reply #2 on: May 18, 2015, 07:38:12 PM »
The CBX ran the inside cylinders a bit richer to reduce heat production. I have never heard of doing this on a 4 either.
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Offline 75 super sport

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Re: 6sigma jet kit question
« Reply #3 on: May 18, 2015, 07:39:17 PM »
6sigma is the name of the company I bought the kit from
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Offline flybox1

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Re: 6sigma jet kit question
« Reply #4 on: May 18, 2015, 08:10:41 PM »
Oh...6Sigma....I wondered if you were alluding to some new jetting process improvement.  ::)
Stick with OEM jets.  Money well spent for a properly running bike.
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline chewbacca5000

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Re: 6sigma jet kit question
« Reply #5 on: May 18, 2015, 09:01:29 PM »
I bought their kit for a 650 and has the same jet setup for the inner cylinders.  That bike pulled like crazy once it got going.
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Offline 75 super sport

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Re: 6sigma jet kit question
« Reply #6 on: May 19, 2015, 04:07:26 AM »
I've heard nothing but good things about them. I will make sure to post a review once I get it going.
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