Author Topic: sigma jet kit?  (Read 2149 times)

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Offline locomonza

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sigma jet kit?
« on: February 12, 2014, 03:07:59 PM »
Hi, what you people think about the sigma jet kit? They are custom made for your bike, any pro and con?. Does anybody used them?
Every comment will be very appreciated......
Thank you in advance...... ;D

Offline bjbuchanan

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Re: sigma jet kit?
« Reply #1 on: February 12, 2014, 07:24:58 PM »
?

Unless it includes dyno tuning while they have your bike I don't see what is different than asking the forum what is recommended for your bike and comparing to what you have through plug chops. I dont know the company

Siriuscon inc, jets r us
The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers

Offline locomonza

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Re: sigma jet kit?
« Reply #2 on: February 15, 2014, 09:03:46 AM »
I just asked for anyone knows that, thats all, so thank you anyways you were very helpful....

Offline Pigford

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Re: sigma jet kit?
« Reply #3 on: February 15, 2014, 10:14:03 AM »
I got a Sigma Six kit - not for me CB750, but my Kwak W650.

It is cheap (even for me shipped to UK) and worked fine with good instructions. I only really need to jet the bike up a bit as they're quite lean from factory - but now my bike is much nicer to ride  ;)

Offline bjbuchanan

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Re: sigma jet kit?
« Reply #4 on: February 15, 2014, 10:36:32 AM »
I just asked for anyone knows that, thats all, so thank you anyways you were very helpful....

I just don't like when companies make "kits" for a bike they haven't touched. It seems to have a bunch of stuff in there but how much of it you would actually need is pretty questionable. If you want to know real numbers of jets we all use on our modified bikes we will tell you, they pretty much make it their black magic
The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers

Offline reddyvv

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Re: sigma jet kit?
« Reply #5 on: February 15, 2014, 04:01:04 PM »
I just don't like when companies make "kits" for a bike they haven't touched. It seems to have a bunch of stuff in there but how much of it you would actually need is pretty questionable. If you want to know real numbers of jets we all use on our modified bikes we will tell you, they pretty much make it their black magic

What makes you think that they haven't tried the kit on a standard bike? Most kits are designed for bikes with OEM equipment that haven't been messed with. The various jets included in the Dynojet kits at least are for different elevations and in some cases they include additional jets for use with high flow air filters like K&N.

I don't know about our CB's but jet kits can be very helpful for bikes that were jetted lean from the factory. There are many examples of bikes that had less than optimum factory jetting to comply with emissions, meet better mileage targets, etc.  Even many of the newer fuel injected bikes have less than optimum fuel/ignition curves programmed into them for the same reasons.

The Dynojet kit transformed my stock ATV by just following the packaged recommendations, no fiddling required.
« Last Edit: February 15, 2014, 04:06:18 PM by reddyvv »

Offline bjbuchanan

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Re: sigma jet kit?
« Reply #6 on: February 15, 2014, 04:57:02 PM »
Like I said in my other post, it is THEIR black magic. Maybe if you call and ask nicely they will give you some indication as to what size stuff they send but unless I have numbers I don't care much for them. Why pay them 80$ when you could spend a whole FIVE MINUTES searching the endless stuff that has already been covered here for free.

Like Pods? 42, alternate is 45 pilot jet. Needle clip in middle, if too lean richen one notch, which is the 2nd clip from the top. 3/4 turns out on airscrew and up it to atleast 120 main jet. Now for 40$ worth of jets and my time give me 80$. But I don't have a cool name so you won't paypal me the money? oh ok, can't say I'm surprised ::)

The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers

Offline reddyvv

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Re: sigma jet kit?
« Reply #7 on: February 15, 2014, 06:03:31 PM »
I don't disagree with anything you say. However there are plenty of people who are either too intimidated, don't have the time, don't care about putting in the research and a zillion other reasons. For them a jet kit is worth paying the premium and getting a little better performance. Could it be better if you spent the time and effort to customize the jetting for your individual bike? Of course. If you don't screw it up  :)

Offline bjbuchanan

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Re: sigma jet kit?
« Reply #8 on: February 15, 2014, 07:59:47 PM »
You are in Brewster? I'm over in Tarrytown, not that far
The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers