Hey looking to start buying parts for my build, i have a lunch box and Jardine exhaust. has anyone rejeted with these. going to buy carb kits also. looking for what brand, i have Projet in mine now works great but i had to drill some in the carbs, just wondering what other people have used. has anyone used a jet kit from Sigma Custom carburetor?

Have a peek at the wiki. It has a table of jet settings for different setups:
http://wiki.gstwins.com/index.php?n=Upgrades.Rejetting

I'm not personally a fan of jet kits. In my opinion, you should be able to rejet with no modification to your carbs (other than jets/washers, of course). And most kits have their own different jet size scale than Mikuni.

To answer your question more directly, I have a pod filter setup with a full Jardine, and a slight timing advance. I rejetted to 22.5/65/147.5, with Mikuni jets that I ordered online. I still don't have it dialed in quite yet, but it runs very well. And the jets were relatively cheap, which is always a plus.

i think im just going to say f%$k it and stick with the E style carbs and modify the newer hand controls and wireing harness. Trying to rejet the F carbs on my E engine/bike looks like its going to be to much of a pain in the ass. I'll just sell the F carbs. will post on for sale in a day or t

It's not that bad. It's just one more jet. The newer carbs also offer a better power band. And I wasn't saying that you can't do a kit. They work. I was just saying that there are cheaper alternatives to kits.

Ask 'The Buddha' on this site .... He very handy with Jets! 

ya i know i could do it but the cost- reward isnt going to be worth it. just going to sell them.

Ahh c'mon! ... Jets is like cheerleaders!! ...3 is always better than 2 

like women more are always more expensive.

This also is valid!!   

... Off topic ... But ... The more women thing.... You ever seen that show 'sister wives' I think it's called.... Dude has 4 missus ... And they all used to live in one house! .... That man is a crazy man!! 

ya i couldnt imagine.

Quote from: knowles on August 07, 2013, 12:38:05 AM
i think im just going to say f%$k it and stick with the E style carbs and modify the newer hand controls and wireing harness. Trying to rejet the F carbs on my E engine/bike looks like its going to be to much of a pain in the ass. I'll just sell the F carbs. will post on for sale in a day or t

Old or new carbs are nearly the same to jet ... newer is one more jet ... but you can swap the 2 and be fine ... its a bigger PITA to fit newer carbs on an older bike, but you still dont need to do the old carbs ... E or F ... jettable by a gorilla ... 20/147.5 for new, 40/150 for old ...
Cool.
Buddha.

even with the full exhaust and lunchbox? so i would only need to put in tge mid jet. are the slids the same because i had to drill holes and cap them in my carbs. one of the reasons for the carb up grade is to run the newer handle bar controls. just thinking that it might be not worth all hassle.

What does one thing have to do with the other?

newer controls are different than the older ones. thought it would be easier to replace the carbs than trying to modify the controls and wiring harness. but i think thats what Im going to do, and sell the carbs.

Quote from: knowles on August 08, 2013, 09:28:21 AM
newer controls are different than the older ones. thought it would be easier to replace the carbs than trying to modify the controls and wiring harness. but i think thats what Im going to do, and sell the carbs.

Take a deep breath and don't sell anything yet.

To be clear - the F model carbs absolutely will work with an E model bike and viceversa. Secondly, I just can't wrap my head around this "modifying the wiring harness" thing you talk about. Are you SURE you didn't by accident pick up a Multistrada some joker dressed as a GS500? You don't need to do anything to the wiring harness to make the carbs you have work with the bike you have.

Newer carbs have a throttle position sensor and a vacuum switch. These are for the newer electrical system and ICU to adjust timing.

THESE CAN BE IGNORED!

Don't connect them to anything. Don't worry. The older bikes (through 2002) didn't have these sensors and won't care that they are not connected.

They are only sensors - they are not extra controls for the carbs.

(FYI: 2001-2002 were the same 3 jet carbs without all the vacuum hoses and sensors).

Oh, and newer handle bar controls have no relation to the carbs. Newer wiring harnesses (2004+) have the ICU that uses the sensors on the carbs to adjust timing. Even with the newer system, you can disconnect the carb stuff and there is no ill effect. I suspect the throttle position sensor tells it how much gas you're wanting to pump in and  the vacuum switch tells it if the engine is going fast (by sucking in air and creating more vacuum). There is the electronic tach that comes from the ICU so the thing does know the speed and throttle position to adjust timing.

In my builds, I go with 2006+ wiring. In 2006 the headlights started going through the starter button to kill the headlight when starter button is pressed. Connection to right hand control is different for 2006+ versus 2004-2005.

Newer wiring is super cheap - like $15 for a complete harness. Under $100 including the ICU and misc. electrical bits. 1989-2000 is pretty expensive AND that old stuff is in pretty poor condition. One reason I go with newer wiring. Nearly new hand controls are also rather inexpensive for 2006+ (well, 2004+ if you want to use 2004-2005 wiring).

so if i go 2006 whole harness (all modules, hand controls), 2006 headlight, and 2007 frame. with a 89 engine and carbs there will be no ill affect?

None at all. Use the 2004+ timing rotor and single pickup with the newer wiring and ICU. While the older pickup is plug compatible (second sensor is not connected on the harness end of the connector), you must use the new timing rotor.

Block off the tack port on the engine unless you use a mechanical tach.
You can connect up everything if you use newer carbs, otherwise the ICU goes into a dumb default mode where it assumes those carb sensors are broken.
Neutral pickup has additional contacts for 1st and 2nd gears so you can put that in or leave it as the older one with just neutral. (or put in a gsxr one with contacts for all 6 gears and add a gear indicator).
Newer carbs will need the newer carb boots and airbox (air intake is different shape and size).

You can use standard round headlight. It is just the 3 pin connector to the lamp for both. I think an "F" headlight mounted on a naked bike looks rather dorky and cheezy. Go round or try a stock rectangular headlight.

I like newer harnesses for another reason: all connections are under the tank. No more cramming all that crap in a headlight bucket.

Not to thread-jack, but what happens when the ICU goes into the dumb default mode? I accidentally left that sensor unplugged on my 2004 and it didn't seem to make a difference.

The ICU does minor timing adjustments. I doubt most of us would notice anything - maybe a slight difference in acceleration if we were paying close attention. Slight timing adjustment for emissions is a good guess.