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Rejetting an 07 GS500F

Started by steguis, June 09, 2009, 09:57:34 AM

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steguis

Ok, I just ordered a luncbox filter and got in touch with buddha for the jets. Now, this is the first time I'm attempting anything like this and I've read the poor man's rejetting process a bunch of times and I realize that's really for a pre-2004 GS500. Question is, for those who have rejetted their GS500F, can you give me any tips for the little details that will make my install as smooth as possible? Besides a screwdriver and some sockets and ratches, is there anything like screws and hoses I should purchase and have handy just in case. I hate being in the middle of an install and then having to run off to get tools or other parts I need. Also, did you have to remove your fairings to do this? Basically, any wisdom you can impart would be great!

Thanks,
Steve
2007 GS500F | Yoshi TRS SS | K&N Lunchbox | SM2 bars | Fenderectomy | Katana rear shock | Sonic 0.9kg/mm for springs | 15T | Rejet 20/65/147.5| Zero Gravity Double Bubble | Progrip grips and tank protector | R&G Racing Frame Sliders

jrains89

you need vicegrips because the brass screws will strip very easily, and you can use vice grips to get em off with ease.  Um, you will also probably need a drill, because you have to drill out this cap thingy that's in the way of the air screws.
2004 GS500F

kml.krk

you do not need to take the fairing off. just the seat - under the seat there are the tank bolts.
Yellow 2004: K&N Lunchbox, Leo Vince SBK, 2005 GSXR Turn Signals, 20/65/147.5, 15T front sprocket, Progressive Springs etc...

"Bikes get you through times of no money better than money gets you through times of no bikes." - Phineas

respite

+1 for the vice grips to get the crappy screws off that hold the carbs together. Make sure you get replacement screws (most replace with hex head screws) for both the top and bottom of the carbs.

The Buddha

Most replace them with allen heads, hex is a bad choice for that location. And the brass screws are not brass, they are yellow colored steel. And yes they still strip and they still are made of cheese.
Cool.
Buddha.
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I run a business based on other people's junk.
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respite

Meh. Hex socket. You happy?  :laugh:

steguis

Thanks, can you let me know what size screws I'll need so i can pick them up in advance.
2007 GS500F | Yoshi TRS SS | K&N Lunchbox | SM2 bars | Fenderectomy | Katana rear shock | Sonic 0.9kg/mm for springs | 15T | Rejet 20/65/147.5| Zero Gravity Double Bubble | Progrip grips and tank protector | R&G Racing Frame Sliders

The Buddha

It is included in the jet pack I am sending you kiddo ... sheesh ... you'd think I am some sorta random dude on a website ...

I am a random dude on the GSTwin site ...  O0

Cool.
Buddha.
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I run a business based on other people's junk.
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ecpreston

#8
I thought the carbs were the same from '01 and up  :dunno_white:  The '04 just had a slightly larger main jet in stock form right?

Well FWIW, what jet sizes are you going to try? I'm about to order some for my '02, just doing lunchbox like you. I think I'm going to try 20 pilot, 65 mid (no washers), 140 main.

ecpreston

#9
And Budda/random dude.... I thought you didn't have a kit for this setup? What gives?   :icon_neutral:

Chanse

Use the right size screw drivers to remove and install the jets, dont leave any wiggle room or they will strip, Next, Definately get an impact screw driver and someone to help you hold the carbs while you whack away at them, that way you dont inadvertantly break off a tab, screw boss, or break a bowl or something else. You may have to use a set of vise grips to remove a few of them but cant get them all with the grips, and definately use the allen screws that come with the pack. Good Luck.
Current project:
Mmotos full body kit (YOU DONT WANT TO DO BUSINESS WITH THEM... READ MY THREAD BOOT STATE UPDATE)
K&N Lunchbox
Buddah's jets
CBR F2 rearsets
Ducati pass pegs (Modified)
Kat rear wheel
Carbon Fiber Exhaust Can, possibly shortened and relocated
And so on......

steguis

Thanks for all the info. I'm sure i'm just overthinking things. I always seem to find myself getting stuck with installs because of one screw or one bolt and last weekend, my friend and I were working on his car and what was supposed to be a 4 hour job took over 8 hours because we kept on having to go back to the store to get additional things that got foobared :( So for this install, I want to make sure I'm not missing anything before I get started :D This is definitely a very fun bike to ride and work on.
2007 GS500F | Yoshi TRS SS | K&N Lunchbox | SM2 bars | Fenderectomy | Katana rear shock | Sonic 0.9kg/mm for springs | 15T | Rejet 20/65/147.5| Zero Gravity Double Bubble | Progrip grips and tank protector | R&G Racing Frame Sliders

The Buddha

Quote from: ecpreston on June 09, 2009, 01:40:53 PM
And Budda/random dude.... I thought you didn't have a kit for this setup? What gives?   :icon_neutral:

He was buying the one with pipe ... 147.5 main ... OK 140 main - my friend tripleb tried it, check with him and he can hook you up ... oops wait, that is old GS ... sorry ...
OK you want 140 mains - lemme ask if the local clowns have it sitting round.
Cool.
Buddha.
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I run a business based on other people's junk.
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Asym

I didn't need an impact to remove the jets, just a larger slotted driver and keep pressure on it.

I've never seen anyone give tips on adjusting the air/fuel screw except do it in half turn increments. I use a slotted bit from a power screw driver that's around 2 inches long, think it has 6 sides. Put a piece of tape on one of the sides so you can keep track of how many turns out or in that you do. This was the only way I could make the adjustments and keep track of how many turns I've made with the carbs on the bike, there's almost no room to get even a stubby driver in there.

steguis

Oh right, that was the other thing I wanted to ask. The instruction say to turn the screw to adjust the air/fuel. Is there a screw for each carb? If so, are you supposed to adjust them one at a time or do you turn both of them an equal amount at the same time?
2007 GS500F | Yoshi TRS SS | K&N Lunchbox | SM2 bars | Fenderectomy | Katana rear shock | Sonic 0.9kg/mm for springs | 15T | Rejet 20/65/147.5| Zero Gravity Double Bubble | Progrip grips and tank protector | R&G Racing Frame Sliders

Chanse

Asym an impact screwdriver is a fat screwdriver that you smack with a hammer, and its used to break tight screws loose. As in the ones holding the bowls on, not the actual jets.... Ding frys are done....
Current project:
Mmotos full body kit (YOU DONT WANT TO DO BUSINESS WITH THEM... READ MY THREAD BOOT STATE UPDATE)
K&N Lunchbox
Buddah's jets
CBR F2 rearsets
Ducati pass pegs (Modified)
Kat rear wheel
Carbon Fiber Exhaust Can, possibly shortened and relocated
And so on......

The Buddha

Quote from: steguis on June 09, 2009, 07:46:50 PM
Oh right, that was the other thing I wanted to ask. The instruction say to turn the screw to adjust the air/fuel. Is there a screw for each carb? If so, are you supposed to adjust them one at a time or do you turn both of them an equal amount at the same time?

Yes air mix screw is 1 per carb, there is an Idiotic brass cap on it that needs to be drilled out first.
Cool.
Buddha.
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I run a business based on other people's junk.
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ecpreston

#17
Quote from: The Buddha on June 09, 2009, 05:57:33 PMHe was buying the one with pipe ... 147.5 main
ah ok  :thumb:

it's ok, I'll probably order them up and try to find someone on here to take the extras if it works out well for that setup. Will PM tripleb too, thanks.

steguis

Thanks. I'll try to take pics of every part of the install and maybe do a write up.
2007 GS500F | Yoshi TRS SS | K&N Lunchbox | SM2 bars | Fenderectomy | Katana rear shock | Sonic 0.9kg/mm for springs | 15T | Rejet 20/65/147.5| Zero Gravity Double Bubble | Progrip grips and tank protector | R&G Racing Frame Sliders

Asym

Thanks for the tutorial on what a impact driver is. I didn't need a second person to help remove a screw or change a light bulb. There's also an impact driver in the garage that I haven't had to use in years.

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