noob question

[noblanks]

Recently bought a 2008 GS500F and wanting to start the upgrades. I do not know anything about small engines. Does the carb need rejetted if I change the muffler to a dual setup like on a B-King or yamaha r1, undertail or any other setup other than ones designed for this bike.

[Big Rich]

There's no definite answer - a lot goes into jetting for a bike.

Will it most likely need re-jetted? Sure. Changing the exhaust doesn't affect air flow as much as changing the intake. But it does affect it.

[SS Adrenaline]

Not to mention its prob running lean from stock.  A rejet is inorder even if you do no mods, jm2c.  Big rich is right, the exhaust can only flow "out" what goes "in" , and what limits the "in"  is the intake.  Try a K&N pod or lunch box for the intake if you want more air "in".

[mister]

You do NOT NEED to rejet the bike. It will run fine totally stock - as mine has done for 50,000+ kms.

But I gotta ask... why do you want to put on dual exhausts?

Michael

[SAFE-T]

How would a dual-exhaust be an upgrade ?

Likewise, an undertail exhaust has also been proven to be inferior to other designs from an engineering perspective as well.

[SAFE-T]

What you need to ask is whether doing something for the sole reason that you think it is a good idea is actually a good idea.

[TonyKZ1]

Instead of immediately jumping to upgrades why not ride and enjoy the bike as it is. Then later if you still want to do some changes to the bike.
Have you taken the MSF course or any other rider training? Have you obtained your protective gear (ATGATT)? As this will make much more difference in your riding than installing dual mufflers or some other thing on the bike.
Then again this is just my 0.02 worth, Tony

[noblanks]

I guess I should not of used the term upgrades. More along the line of custom changes. Performance and appearance. PERSONALIZING, I am not new to riding, just new on a sportbike. I wear ALL protection for the ones that mentioned it. I am a noob only in the sense of motorcycle engines and suspension. Like you guys, I know there is not much out there to buy for this bike. Stock this bike is plain and boring. A lot of my changes will be for looks due to the fact I got this for a daily ride not to act stupid and break my bones. I work in fab shop in the laser programming department so have already drawn up a custom chain guard, toe guard, clock mount, and swingarm spool mount for a bike stand. I just need to get them made. With weld, brake, layout and paint departments to use there is almost no limit to what I can make. First change I want to make is the tail. I like the look of the smaller dual setup along the tail or undertail look.

[BaltimoreGS]

sportbike

Sorry, had to do it     Welcome to the forum   

To answer your question:  It all depends on if the new exhaust changes the air flow.  It if flows more you need to richen the mixture to keep it near the stoichiometric mix.

-Jessie

[Dizzledan]

I work in fab shop in the laser programming department so have already drawn up
a custom chain guard,
toe guard,
clock mount,
and swingarm spool mount for a bike stand.

With weld, brake, layout and paint departments to use there is almost no limit to what I can make.

First change I want to make is the tail. I like the look of the smaller dual setup along the tail or undertail look.

If you have the desire, manpower, and equipment to do all of this, don't let anyone on an internet forum tell you not to do something.

[SAFE-T]

Ok, if it is purely to entertain yourself, have at it 

[noblanks]

Unless I am taking SAFE-T's replys wrong, he must be "that" guy. You know... the one that is always critical of others ideas and comments. I am not doing anything to my bike to just "entertain myself." But I am sure SAFE-t will entertain me with his posts.

[adidasguy]

Like you guys, I know there is not much out there to buy for this bike. Stock this bike is plain and boring. A lot of my changes will be for looks due to the fact I got this for a daily ride not to act stupid and break my bones.

Well.....  if you look around the world, there is a lot to buy.
Seats, shark find, stainless chain guards (Germany and from me  ), rear sets, fog lights, smoke turn signals, smoke LED tail lights, muffler guards, etc. I LOVE the challenge of finding stuff. Most recent acquisition is some brand new old stock bars for the OEM clip-ons.

Have fun and enjoy your bike. POST PICTURES!


Some things I've done:

[wildcat333]

@adidasguy - more info on your fogs please? name/link/cost/ease or difficulty of install?

[adidasguy]

Easy to install. Couple models available from twistedthrottle.com
Denali fog lights.

I use the newer forks on Junior (bikes must have a name, in case you were not aware of that). He's a 1992 from Canada. Put on a new 2009 set of forks when I saw a leak on a fork seal (I'm a parts whore, so have lots of everything). The newer forks have a mount for a round reflector because the fairing blocks where the reflector used to go. So I use that to mount the fog lights then put on Harley stick[on reflectors which I think look better. Lights come with switch and wiring harness, fuse and connections back to battery. One wire taps onto the headlight wire so they only go on when the bike is on. Search other threads or click my profile link below to see all the pix of my bikes. There are photos with and without the fog lights. They are amazing!

With older forks, you can get different mounts or make your own or mount them elsewhere on the bike.

[SAFE-T]

I rebuilt a VFR which I still own and have ridden for the past 6yrs. It has parts from an RC51, RC45, CBR600, CBR929, Ducati 748R/996 and an Aprilia RSV-R on it. I delinked the front and rear brakes and it has an Ohlins rear shock and Ohlins front forks with Marchesini wheels and was a Showcase bike in Cycle Canada in 2005.   

[SAFE-T]

Now that I have owned and ridden it for a few years, I would definitely say I did it more for my own amusement than anything else.