Going to get the Yoshimura TRS slip on exhaust for my 09 GS500F and wondering what size jets i should upgrade to and if anybody knows a good place in nashville area to get them done, or if there is a place i can buy them from online
Thanks

theoretically you can get away with stock jets, practically check WIKI for similar setup to find out correct sizes.
link to wiki is a sticky on the forum. check th upgrades section.

you can get them online but you need to know their types and numbers, so it's easier to get them from Buddha. You will pay couple buck more but you have guarantee they will be proper ones 

I am pretty sure he will chime in soon, he has radar for posts with word *jet* in title 

Once you figure out what size you need(I can't say for newer carbs) you can go to a dealer and get them. Or just have Buddha hook you up with a jet/washer kit, he'll be here any minute now.

Are you upgrading the intake too?

You get 132.5 mains and 20 pilots ... and I am still working on the washers ... and you pull the brass caps on the air mix screws and set em to 3 turns.
If you're doing K&N (and there is no reason you should) you get 147.5 mains.
These guys are too kind ... I have had issues with washers and may not get kits for the 01+ bikes made for a month or 2.
The rest of the stuff I have of course, they use small round slotted mikuni mains. Anyway my kit is 25 shipped and included allen screws for the bowls. Dealers sometimes charge far too much ... check it and if its too much get em from me.
Mid mains are optional. I'd run 65 mids if you're changing those, but for slip on I'd not bother.
Cool.
Buddha.

Well gosh, 25 shipped? I gave 80 for a dynojet kit.

Like I said, Buddha will hook you up 

Its $25 including the bolts, and bubble envelope and shipping. That bubble env it a major PITA ... I wish dealers were more responsive to their customers, I'd just post away and not deal with the whole "man I paid you last week and got nothing yet" ... more like last month ... but, too many moving parts in this operation to predictably and sustainably assemble and ship.
If you could find them @ a dealer who would give you the right parts for the same type of deal I get from mine, you could get away with 20 maybe. The info is out there. Its been posted and reposted 1000's of times. Just getting dealers to buy your parts ... yea its but $5 or so for them is the problem. They'd rather sell a pair of oakleys to some pretty girl whose boyfriend will buy her the oakleys so she'd go for a ride with him ... that's where they make their $.
Anyway, its freezing cold round here, in bright sunshine its 28 degrees, yes that's the current temp, its likely to be just shy of the high for the day, WTF.
I tried walking outside to get stuff out of my car. Froze my a$$. Have fun you guys, wish I could run off to the mountains and slide down in an inner tube and call this whole miserable week as a DOA. God its just tueday afternoon.
Cool.
Buddha.

What you guys recommending size of jets for this thing: http://cgi.ebay.com/ebaymotors/2-Universal-Motorcycle-SHORTY-Moto-GP-EXHAUST-BLACK-_W0QQcmdZViewItemQQhashZitem27b3d97857QQitemZ170521098327QQptZMotorcyclesQ5fPartsQ5fAccessories
All air intake will be original

What year of bike ?
Overall I would stay around that stock + 1 all around and adjust with washers, turns and stuff. Pipe has very little effect on the jetting, it only needs jetting cos its jetted anaemic to start with.
Cool.
Buddha.

Budda its an 09 GS500F with all stock set up now but planning to add yoshimura trs slip on and maybe a different airfilter if you think it helps
how to a order the jets and stuff from you?

09 - well I ahve to get something done on the washers front for em. Stupid suzuki, fixed what wasn't broken. Now it wont work.

But pipe = 20/132.5/1-2 washers/3 turns. K&N in air box is 135, K&N lunch box is 147.5. K&N lunch box needs the pipe to run right. That's about it.
Yea once I fix the washer problem I'd sell ya them jet packs no problem.

Cool.
Buddha.

I have always wondered something.

If we increase the jet size, that increases fuel flow, which should in turn increase horsepower, right?

Can we proportionally estimate an increase in HP based on increase in jet sizes?

If so, it looks like you'd be silly to not run a lunchbox.

Its not a linear relation between hp and fuel consumption though.
K&N and pipe are good for on average 4 hp, or 10% more. They will hurt your gas mileage by a not much more than that.
The reason you go to much bigger - rough calculation is a 20% larger 25 out of 125 lets say with the reference point as 125 not 122.5 cos its lean @ 122.5. 125 for stock and 150 for K&N and pipe leave you about the same richness mix wise ... you go up 20% cos the K&N causes the vacuum to drop, likely by a 20% approximate amount. To cover that you have to put in a bigger jet.

Ironically what a lot of people dont realise is, if you were to put smaller carbs on a bike, guess what, you need smaller jets. It will run perfectly at all rpms till you reach wfo on the throttle and the bike tops out @6k rpm. Peak air flow is needed for peak rpm. That is why they put larger carbs on the short stroke GSXR 750 than they did on the 1100. 1100's had 36mm, 750's had 38's. 1100's made 10K 750's ran to 13.5 ... and the short sucking stroke meant they had to fill much much faster.

Anyway the 10% rise in peak power and the 10% drop in fuel economy do sorta work about linearly as you can get.
Cool.
Buddha.

Will the suzuki dealership be able to get the jets and washers i need??

Quote from: tundrav8 on December 19, 2010, 08:27:23 PM
Will the suzuki dealership be able to get the jets and washers i need??

Depends on your dealer. I have my local clowns beat into submission. So they get me the right ones. They also make me order like 250 worth ... so I sometimes buy other stuff.
Anyway I can make you a jet pack, 25 shipped in US 27-28 outside US. I just picked up a handful of jets in all the GS sizes/types. So I got em stocked.
Cool.
Buddha.

Hi ive just been through the exercise of making my 09 gs500f hum,my pilot jet is22.5 ,needleis#0994g5-84M-60u 2.9ct  set second grove from top,jet mid main#60  ,main jet 150 at sea level .air filter is out of a gsx1400 it is identcal too gs500 air filter except is 1/2 " longer   .altered ignition timing with 3mm slot mod as found on this site  ..standard muffler is used and has a nise cackle to it as you get your timing and mixture right .this bike has been on some long rides and it certanly has the performance .

opps forgot air mix screws 3 turns out as told on this .

Needle grooves ? what country you in ? Some lucky countries got grooved needles.  ...
Anyway you got 150 mains and have stock air filter and stock pipe ?
That seems huge ...
The rest is OK, 22.5 in place of 17.5 stock is one well proved combo. But on a stock bike I wont run any larger than 132.5, 1 size up from stock.
Cool.
Buddha.

and when you are all done you'll be able to do this;

http://www.youtube.com/watch?v=Jv5MW4IsmT0&feature=related

What, a wheelie? I rode wheelies all the time before I even considered a jet kit. You can clutch it up on pretty much anything.

Budda the air filter im using is out of a gsx1400 suzuki ,i dont think they were imported into america, the needles i imported from factory pro in america . and have 5 grooves different to the origionals with no grooves  .i tried 147.5 but seemed lean and settled on 150 mains .