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View Full Version : Whoever has done a jet kit on a 750 ..............


Spedee
02-13-2007, 04:19 AM
Could you post your setup.

Thanks.

KatanaJim
02-13-2007, 08:08 PM
I would be interested in this too!!!
I have a second set of carbs that were removed from my bike, that MAY have been jetted for my yosh pipe and UNI filter (in the stock box). Those carbs were replaced with a new stock set of carbs. I have a set of aftermarket needles from the orig. carbs. I am thinking of getting some 120 main jets and throwing them (and the needles) on the new carbs. From what I can tell, Needles on the 3rd clip, 120 main jets and mixture screw 3 turns out, should be close right?
Unfortunately, I just cant scrape up $120 for an Ivans kit, so I am going to try to go the cheap route. Cyber... you out there?

evil-eye
02-13-2007, 09:40 PM
i would like to hear opinions on this to.
carb setup for full exhaust k&n pods

md86
02-13-2007, 09:44 PM
You COULD just go to DJ's website and download their PDF .... But remember , their suggested settings are gonna be a bit rich . And all people who list their settings seem to be different , even for the same model bike ....

Spedee
02-14-2007, 04:33 AM
I just took a look at the 750 jets in this bike I have. Theyr'e all 112.5 and yes they were 3 turns out.

ThAzKat
02-14-2007, 05:55 AM
I would contact Ivan on this one. Do not forget that on the stock setup #3 carb jet is different. I know it seems that you should put all the same size jets in but suzuki made that one a different size for a real good reason. Jetting is as different as each bike is, you have so many variables. I would start with what you have then fine tune from there. 3 turns seems like alot to me.

BarMatt80
02-14-2007, 06:56 AM
spedee, I presume that you are looking for post 98 kats? because no one makes a stage 3 or anything for the post98 kats. Only a stage one, and I don't know what jet numbers come with it. And I know that ivan has stated before that no gains have been made from using k&n pods.

katanajim-i don't think ivan makes a pre98 jet kit, but i have been wrong before and could be now.

I had a yoshi exhaust on my '92 750 and a k&n pod filters. I had 126 mains, can't comment on the needles since The emulsion tubes were so worn. Float at 15mm, and I think 2.5 turns out on the pilot.

once i get my bike dyno and sync'd with the vance and hines full system i'll post up the new specs. I have 124 mains, new emulsion tubes, needle on 3rd down or maybe 4th can't remember. float at 15mm, and 2.5 on the pilot. However doesn't run that good. BUt that could be the near zero degrees somedays, not being sync'd, and not dyno'd. I am thinking i need to go to 126 mains and lean out the needle to 3rd clip(that is if on the 4th). And i think richen up the pilot 1/8 turn.

oh yeah all dynojet numbers

ThAzKat
02-14-2007, 07:08 AM
BarMatt, IMO, it is the pods that are your problem.

BarMatt80
02-14-2007, 07:23 AM
thaz.....that might be the problem. the bike has a registered 35k some odd miles. could have many many more. me having no record of any sort of valve adjustment ever done, no history of the motor, could have some kind of engine work done, never been sync'd and received it messed up. who knows, won't know till the weather gets warm and i crack the top of my engine open. however the dyno guy says the bike has lived a hard life, which I can tell. slowly it is livin better. i just haven't got it running the way it has suppose to be because I couldn't find anyone to dyno the bike. But maybe i should give the dyno guy the stock airfilter and box.

Spedee
02-14-2007, 09:05 AM
#3 has the same jet as the other three. And three turns was factory settings.

I would contact Ivan on this one. Do not forget that on the stock setup #3 carb jet is different. I know it seems that you should put all the same size jets in but suzuki made that one a different size for a real good reason. Jetting is as different as each bike is, you have so many variables. I would start with what you have then fine tune from there. 3 turns seems like alot to me.

KatanaJim
02-14-2007, 12:35 PM
As I recall from reading posts on this site, #3 had a different size jet because of cylinder temperature being higher in the middle of the engine. It was explained as an emissions "band aid". Most people put all of the same size when they re-jet.

Thanks for the input guys!

Drastion
02-14-2007, 03:43 PM
My bike is an 06 750 with grinded headers and a Yoshi TRS Pipe. Stock header and filter.

STOCK: The carbs were jetted with 117.5 main jets and I don't
remember the turns. But the jets were all the same.

Ivan's: The main jets supplied were 110, much smaller yes, but the suggested turns out are to start at either 3.5 or 4. I split the difference and went 3 3/4 all the around. I have only put a couple hundred miles on the bike since jet install but it seems to be running great.

As soon as it stops snowing here I'm heading to a dyno shop and having them fine tune it for me. I will post up results of optimum settings, for my bike, once it's done.

The CyberPoet
02-16-2007, 07:24 PM
I went with the Ivan's for Malloc's 750 and it was 110 across the board and 4 turns out for peak performance (3 turns out for peak gas mileage).

Cheers,
=-= The CyberPoet

Spedee
02-17-2007, 03:39 AM
I am leaning to the Ivan's kit now. Only concern is the stepped header I have which is a lot different from stock.

I went with the Ivan's for Malloc's 750 and it was 110 across the board and 4 turns out for peak performance (3 turns out for peak gas mileage).

Cheers,
=-= The CyberPoet

The CyberPoet
02-17-2007, 04:05 AM
What brand of header is it, Spedee?
And more over, do you know what the ID is in millimeters (or inches)?

Like I said, I took my 600 down to one of the local dyno places after slapping on the Ivan's, and advancer & a full 750 header+ can set-up, and got them to do the readings -- which were spot on.

Malloc hasn't run his over a dyno+sniffer yet (and he's using a Yoshi can, stock headers), but he has put about 20k more miles on the bike since I installed the kit. Aside from tweaking the pilot screw settings back & forth (depending on whether he's being frugal or performance-oriented), he hasn't had any issues with it. Even in "frugal" mode, it made a bit more power than stock and had a much snappier throttle. Actually, I've gotten into the frugal thing myself now -- got one of the 90 degree motion pro carb screwdrivers and if I'm going to be running over 500 miles in a day, I twist the pilot screws back to 3 turns, and once I arrive (like at the rally), I twist 'em back up to 4.

Cheers,
=-= The CyberPoet

Spedee
02-17-2007, 07:06 AM
Hand made by Dale Walker
"Our full stepped header system is also available for the late model Katana 600 and 750. This will really make it run on top end and remove a considerable amount of unwanted weight."

1.350" OD at the head pipe to the weld
1.500" OD after the weld of the top pipes down to the collector

Your opinion would be greatly appreciated

http://www3.sympatico.ca/spedee/15.jpg

What brand of header is it, Spedee?
And more over, do you know what the ID is in millimeters (or inches)?

Like I said, I took my 600 down to one of the local dyno places after slapping on the Ivan's, and advancer & a full 750 header+ can set-up, and got them to do the readings -- which were spot on.

Malloc hasn't run his over a dyno+sniffer yet (and he's using a Yoshi can, stock headers), but he has put about 20k more miles on the bike since I installed the kit. Aside from tweaking the pilot screw settings back & forth (depending on whether he's being frugal or performance-oriented), he hasn't had any issues with it. Even in "frugal" mode, it made a bit more power than stock and had a much snappier throttle. Actually, I've gotten into the frugal thing myself now -- got one of the 90 degree motion pro carb screwdrivers and if I'm going to be running over 500 miles in a day, I twist the pilot screws back to 3 turns, and once I arrive (like at the rally), I twist 'em back up to 4.

Cheers,
=-= The CyberPoet

Spedee
02-17-2007, 12:58 PM
I phoned Ivan this morning. After talking with him I ordered one 750 jet kit. To be able to drop it in and be all done is really cool. So now I had to remove the K&N ai filter for the stock as per his advice. This should complete my 750 project.

The CyberPoet
02-17-2007, 04:02 PM
I was on the phone with Dale yesterday (finding out if he still had ignition advancers in stock), and I wish I had known about this, in order to ask him.

If I guestimate (SWAG) that it's approximately 3/32nds wall size for the tubes to get the ID from the OD, then that would put you into 29.5mm for the upper segment and 33.3mm lower tubes, which is about a 2.5mm ID gain (over dremmeled out stock) on the upper and a 5mm gain on the lower -- a lot of difference. It's enough of a change that I would run it over a sniffer after installing the jetkit to make sure you're getting what you're aiming for.

Looking at it, I wonder if Dale used the stock pipes at the top can cut/welded larger/thinner pipe from the cut to the collector... :dunno:

Cheers,
=-= The CyberPoet


Hand made by Dale Walker
"Our full stepped header system is also available for the late model Katana 600 and 750. This will really make it run on top end and remove a considerable amount of unwanted weight."

1.350" OD at the head pipe to the weld
1.500" OD after the weld of the top pipes down to the collector

Your opinion would be greatly appreciated