Carb jetting

[Codoloco]

Hi I m looking into rejetting my carbs.  Is there anyway to do it without taking it off the bike?

[Suzuki Stevo]

No...getting the 8 JIS screws on the bowls out is hard enough with the carbs off the bike, I couldn't imagine having any kind of success removing them with the carbs on the bike.

[mennobike]

Luckily, taking the carbs off the bike is super easy, maybe a half hour job. Even I can do it. Getting those $%&%%%$###$##@@##$$#@##$$$###! bolts (screws?) out to get inside the carbs, however, can be a different story. Just be careful not to strip them, and if they look rough, consider replacing with hex heads.
https://www.boltdepot.com/Product-Details.aspx?product=6408

[Codoloco]

Ok thank you excellent feedback.  This is my first time so it's definitely going to take me some time.  Not going to rush it at all.

[Suzuki Stevo]

Find yourself a JIS Screwdriver, it should help allot, or use the method I use before I add the hex head fasteners on reassembly.

[Dr.McNinja]

Find yourself a JIS Screwdriver, it should help allot, or use the method I use before I add the hex head fasteners on reassembly.

Adding to this advice, I was able to unscrew a bunch of the brass screws by using a clamp like that attached to a really long screwdriver.

Just be careful. The brass screws are extremely easy to strip. I replaced all mine with stainless M4x0.8x10 phillips head.

[Codoloco]

Excellent.  I might be on here a few times then at least for some help possibly I do need to rejet though.  I put a slip on muffler with the kn lunchbox, I have a 92 GS 500 so I got 40 and 142.5 sizes.   I'm looking at the chart and that seems to be maybe the best bet.

[Elmojo]

What the heck is a JIS screwdriver?
Mine came out easily with a normal Phillips.

[Janx101]

JIS .. Japanese Industrial Standard. . Slightly slimmer but longer tip than normal Phillips? ... with the minimal surface contact available on most screw heads every little bit towards perfect fit can help if the screw is resistant!

[Suzuki Stevo]

What the heck is a JIS screwdriver?
Mine came out easily with a normal Phillips.

You got lucky, I have been opening up carbs since the late 60's and my '07 had the softest most stuck screws I had ever ran across in my life 

[Janx101]

It's the new Asian metal scene man! .. "crapalloy"  lol

[MeeLee]

Find yourself a JIS Screwdriver, it should help allot, or use the method I use before I add the hex head fasteners on reassembly.

I had to use those to get mine off. Replaced bad screws.

+1 on no way you can do a rejet without taking the carb off the bike. Unless you plan on peeling the bike off the carb.
It's a 15 min job. I can do it without detaching the fuel lines, but mine is a bit worn.
you may want to take the extra time to care for your gear.

[Elmojo]

Huh, cool.
Never heard of a JIS screw head.
I learned something new today.
When removing screws from carbs, I typically use the largest driver that will fit, and apply fairly serious downward pressure.
I even sometimes break out my 1/4" impact driver and VERY CAREFULLY tap the screws. Usually, they come right out.
If not, I hit them with a couple drops of Kroil, wait overnight, and try again.
If that doesn't work, I get them out however I can, and replace them with decent screws, as others have mentioned above.

[J_Walker]

Huh, cool.
Never heard of a JIS screw head.
I learned something new today.
When removing screws from carbs, I typically use the largest driver that will fit, and apply fairly serious downward pressure.
I even sometimes break out my 1/4" impact driver and VERY CAREFULLY tap the screws. Usually, they come right out.
If not, I hit them with a couple drops of Kroil, wait overnight, and try again.
If that doesn't work, I get them out however I can, and replace them with decent screws, as others have mentioned above.

know what I hate more then phillips head screws and bolts? FLAT HEAD. next one up, is the Torque [star] stuff. - I always seem to strip those.

my favorites are Hex key, square, and standard hex. If I can, I replace anything that has to come on an off on my bike, with something that would work with my in-bike tool kit.

[Elmojo]

That's funny, since the whole point of Torx drive is to eliminate the easy stripping you get from Hex/Allen head screws. 

[Janx101]

Hmmm yep! .. issue I noticed with torx (or hex. .. or Phillips or... etc) ... but with torx mostly, because they are such an exact fit and the bits need to be seated right down firmly into the screws/bolts.... if there is a little bit of crud in there.. the bit fits the outer edge but doesn't seat properly, so with the much smaller teeth on the torx the metal on either the bit or the head of bolt can burr up pretty easy.   

Add in that a lot of torx sets that a bought are the cheaper ones 'because they good enough' , which use crappy metal not good tool steel.  .... and Houston we have a problem!

I've had a cheapy torx set before. .. the smaller bits would actually twist just behind the tooth/tip section when they had more force applied. .. maybe I over cranked them. ... but the good set I have now that cost 3 times as much has never twisted anybody the bits. .

Sometimes you DO have to pay a painful amount of $ for quality tools!