Help with Exhaust - Which can or system will accomplish my goals?

[mach1]

I never said you told him to change the intake. I said a rejet is a must when changing the intake. I did say dont tell people not to rejet when changing the exhaust. running too lean is bad for a bike. if he changes to a full system he will be running too lean, a slip-on will make hime leaner than the bike already is its bad but not too bad. these bikes are air cooled and running your bike a bit rick will keep the bike a lil coller and cooler is better. im not some online duche telling someone what i read somewhere else or think, Im a certified auto mechanic and know a thing or two about engine and carbs. Do i need to scan pages out of my old school book and show you why rejeting is a must for his bike with a full or slip-on? im tired of people giving stupid advice

[BassHz]

Sorry for dropping out for a while.  This thread seems to have come alive in my absence.  Thanks again to all for the input.

Just for some clarification.  I am currently running the stock exhaust system but one of the PO's drilled and punched out the baffle around the tail pipe and then tried to fix it by welding a round washer-like piece of metal in the opening.  The result is a louder than stock, raspy, crackly sound that I don't like.  An old lawnmower is a good comparison.  I have yet to hear another GS500 in person so I really don't have much to compare it to.  I just want it to have a more refined, lower, growly sound at idle and just above.  I'm OK with it getting louder under load/full throttle but I'd like to be able to baby it in the neighborhood without being annoyingly loud.  I'm not expecting to find anything as quiet as the original stock system.

As far as asthetics, I consider sound to be part of that.  I'm not really replacing the stock system because it looks bad; just the sound.  I'm  honestly not a big fan of either Yoshi's or Jardine's logos but a new can will also approve the looks of the bike as an added benefit.

It sounds like if I keep the stock headers and air filter as well as leave the restrictor in the can, I can probably get by without rejetting.  How will I know if I need to rejet?  What are the symptoms?  Back firing? Dead spots?

BTW, all you guys who replaced your stock exhaust with a full aftermarket system...Do you still have the stock one?  I know from experience it only costs about $20 to ship it ground within the US so maybe we could make a deal.   I know it's sacrilege to some around here but it is a less expensive alternative.

[mach1]

you can tell if you need a rejet by flat spots, bogging(that would be too rich of a mixture) or do a plug chop. if your plug is too white than your too lean) if it looks good and clean than your good. If you dont like the look of jardine or yoshi than V&H is your best bet but thats a full unless you get just the can and weld that on. I have an old can laying around but it has a dent and needs a good cleaning. you can also look at stock cans off other bike and have a shop weld it on for you no rejet will be needed if its stock. but remember the GS is lean as is and bumping the jets up a bit will give you better performance and make you bike happier.

[Roadstergal]

Ha, before I got to the last line in your post, I was going to say - buy a stocker for cheap.

Unfortunately, a lot of people cut their stockers, but I bet there are some full systems out there.  Before you put it on, clean the headers and paint them black with high-temp paint.

There are three stock fullk systems I see on FleaBay that aren't being bid upon; wait for one of them to end bidless, then message the guy and offer less.

[mach1]

Have you tryed to fix your stocker you said someone drilled holes in the cap thne welded a washer why not remove the washer then weld all the holes shut then check in side and see if anything else is cut. It may be cehaper that way.

[BassHz]

I don't know anyone with a welder and the last time I asked someone at a muffler shop, he didn't want to touch it.  Probably worth another shot.

Here's a video of a drilled out stock can that sounds a lot like mine:
http://video.google.com/videoplay?docid=-2392756515604893431&ei=fhXLSYTlF5Ly-gH32cQt&q=gs500+stock+exhaust&hl=en

It's got that same "fart can" sound goin' on.

[allaussiegrown]

BUMP...refer to the previous post right above this one.


So what kind of problems can I expect to have if I don't rejet?

I haven't re jetted and i dont have a problem. I will see if i can get you a decent sound recording of my pipe tomorrow.

[mach1]

what exhaust/intake you running?

[BassHz]

I haven't re jetted and i dont have a problem. I will see if i can get you a decent sound recording of my pipe tomorrow.

That's what I'm talking about Thanks in advance for the clip!  I assume you're running the Yosh TRS slip-on?

[bill14224]

Mach, I don't like you calling my advice stupid when it's you who are wrong.  I don't care if you're a mechanic.  I'm the one who got an A in Physics three times.  I've met smart mechanics in my life, and some who aren't so smart.  Which are you?

You can put any exhaust system on an engine and it won't run ONE BIT leaner until you open-up the intake because the flow rate is decided by the most restrictive component in the system, in this case, the intake.

And you keep saying the GS is too lean from the factory.  To you, maybe, but not to the rest of the public.  If it was actually too lean it would hesitate all the time and bake the plugs, and it doesn't.  Who would buy a new bike that ran like that?  The answer is no one.

[mach1]

its lean from the factory not too lean but it is lean. good for the stock setup. I already changed the exhaust to a slipon without a rejet the bikes plugs changed from being clean looking to a pale white. you may not know it but t hats not a good looking plug i was running to lean. i was still running the stock intake. So I went ahead and added the proper jets the bike ran fine the plugs looked good. I purchased a V&H full setup added that to the bike with stock intake no rejet. wow the bike ran like shaZam!. so  i installed pod filters and rejeted and the bike ran ok. so adding a slipon is fine but chsnging the headers will give you more flow. have you seen the stock pipes next to an aftermarket pipe? i have and its a big change.

lets compare
o=stock pipe O=aftermarket pipe

Its not the same as a car the bike wont adjust itself neither is it EFI where it will also fix itself.
I see you have a full exhaust  put the stock airfilter back in and put the carbs back to stock setup let me know how your plugs look.