I am about to order a lunchbox air filter for my GS, do i need to rejet for this? if so what do i need to get? itll be a DIY thing, so if i need to rejet from stock, what do i need having just put in a lunchbox filter? Thanks in advance for any help.
Rejet? Possibly, but maybe not. You're only giving us the title to a book.
Where do you live (elevation)? Any other modifications? Are the carburetors stock? What year GS? Does it run propperly now? ...etc...
in addition to what mak said, also stock or aftermarket exhaust? or if stock were baffles punched?
IMHO, yes. From reading lots and lots of jetting posts and what ends up working, you get the definite impresson that switching to a luchbox or pods makes more difference to the flow on our bikes than exhaust changes. I'ts not so hard to believe when you hear the change iin sound.
No biggie, since it NEEDS rejetting anyway.
What year?
I'm currently running a lunchbox with stock exhaust- settings in the .sig.
Quote from: serbianstunna on August 21, 2006, 10:31:05 PM
I am about to order a lunchbox air filter for my GS, do i need to rejet for this? if so what do i need to get? itll be a DIY thing, so if i need to rejet from stock, what do i need having just put in a lunchbox filter? Thanks in advance for any help.
http://cgi.stanford.edu/~sanjayd/gs500/Upgrades/AirFilter
scroll down to Lunchbox :thumb:
its a 97 stock everything right now, but am about to put in a lunchbox. thanks for the link, but what jets do i need then? and as or right now the bike will when warmed, idle at 3k then drop to where its supposed to be after a lil. I live in milwaukee so reg. elevation.
If everything else is stock, considering your elevation, jetting likely won't be a serious issue with just the lunchbox. Any other modifications and you will have to rejet.
Must rejet - 150 mains ... not 1 size, like 10 sizes.
Cool.
Srinath.
of course you'll have to rejet!
removing the airbox is a huge modification & you'll have to compensate by giving the bike A LOT more gas.
I put on pod filters which are very similar & if you dont rejet you'll be sluggish throughout the ENTIRE RPM range at each throttle position. simply put: the lunchbox is only half of the mod.
do a search
I started a thread about lunchbox/pod filter install w/ the stock exhaust a few months ago(except I searched 1st :flipoff:) :icon_mrgreen:. that might give you some idea of what you're getting into. your carbs are a little older so dont go by the jets listed in THAT thread, but do a search & your sizes will come up easily. there is a lot more info & feedback for rejetting on the older carbs that the newer ones.
Yeah, you'll be lean as all get out. Lack in response and the engin will actually run hotter as well. Rejet, it's good for it either way.
Ok, executive decision. Everyone rejet now!
-Anti 8)
anyone know around what mileage id be getting with the new set up?
Quote from: makenzie71 on August 22, 2006, 02:19:07 PM
If everything else is stock, considering your elevation, jetting likely won't be a serious issue with just the lunchbox. Any other modifications and you will have to rejet.
I had to rejet when I put my lunchbox filter on. Removing the airbox tends to cause at least a
slight change in air/fuel mix.
At your altitude it'd almost be mandate...in mine it's not detrimental to anything.
milwaukie is a bit lower than I thought, though...I thought oregon was higher off the ground than that? Oh well. It'll probably be border-line problematic for him.
so I've been looking and researching more, and i see srinath said 150 mains while the wiki saiys 147.5 mains? which is the safer route to go?
it's always safer to have too much fuel than not enough...
Ig6
Quote from: makenzie71 on August 22, 2006, 11:53:33 PM
At your altitude it'd almost be mandate...in mine it's not detrimental to anything.
milwaukie is a bit lower than I thought, though...I thought oregon was higher off the ground than that? Oh well. It'll probably be border-line problematic for him.
altitude has little-to-nothing to do with it for this mod. if you remove the airbox you MUST rejet to get the performance the filters offer. otherwise, instead of gaining a slight increase in HP, you're actually LOSING probably a significant amount if you dont rejet. the bike might sound cooler but will be a slug.
not to mention the longer warm-up times, the bike makes popping noises here and there, and running lean hurts the engine.
when riding the throttle wont be responsive and there will be big dips in the power all over the RPM range & throttle positions.
It caused me to lowside. it's no fun leaning the bike over near the edge of the tires with an erratic powerband. I had the bike leaned over pretty far, but wanted to go further to the edge of the tire. I roll on a little bit more throttle to get a steeper lean angle & all the sudden I hit a dip in the powerband when I needed MORE power. It sent me on my ass.
P.S: check the rejetting matrix in the FAQ section for your jet sizes.
He asked if he needed to rejet...it likely won't be necessary to do such a thing. I'm sure he already knows that without propper tuning he won't see the full benefit of any modification. Telling someone that the necessity is lacking is far different from telling them that it's the best way.
Altitude has a LOT to do with jetting...I have an XJ with turn downs and OPEN carburetors that runs phenominally on the stock jetting here, but in houston I can't even get it to start. How can you think altitude has nothing to do with it?
I live in the hills of PA. I have had my bike in Florida, North Carolina, Maryland, New York, New Jersey, ect. Many differences in elevation, no difference in performance. How do you explain that mak?
-Anti 8)
stock bike with generic jetting.
Mak, stock bike? Generic jetting? Oh no my wrongfully assuming friend. My bike is not stock. I have the trio completed. Years ago. Filter, jet, exaust. Elevation doesn't affect my bike. Also, how the hell does your bike not run in Houston? You live in Texas, how much different could the elevation be in... Texas?
You also said that your stock jetting runs great there but not in Houston. So why do you now say that my bike would run anywhere because you think it is stock? Story changes. I am just curious where you get this information.
-Anti 8)
Quote from: The Antibody on August 23, 2006, 09:38:21 PMYou live in Texas, how much different could the elevation be in... Texas?
4000 to 6000 feet...depending on where I'm looking to ride.
QuoteStory changes.
I can't help you if you feel that an XJ400 and a GS500 have anything in common.
Your bike holds perfect tune at any elevation because it's magical. That's the only explanation.
unless you ride up Mt. Everest, its not really gonna matter, ad if you doo WOW that's magical, i want to join you
HAHA, but you compared the GS to your XJ400 first bud.
Anyway, my bike isn't magical, I just fill the gas tank with love, and love will help us climb the highest mountain. :icon_rolleyes:
-Anti 8)
Quote from: makenzie71 on August 23, 2006, 03:22:54 PM
He asked if he needed to rejet...it likely won't be necessary to do such a thing. I'm sure he already knows that without propper tuning he won't see the full benefit of any modification. Telling someone that the necessity is lacking is far different from telling them that it's the best way.
Altitude has a LOT to do with jetting...I have an XJ with turn downs and OPEN carburetors that runs phenominally on the stock jetting here, but in houston I can't even get it to start. How can you think altitude has nothing to do with it?
Mak... I'd love to know where you get an idea like this. Have you done the pod filter/lunchbox mod for the GS and kept the stock jets yourself? I have.... and I'm telling him YOU MUST REJET OR ELSE THE BIKE WILL RUN LIKE SH*T! It has nothing to do with altitude. It has nothing to do with getting a big performance gain out of the new filters. If you do the mod the bike will need rejetting; plain and simple. You can then fine-tune the jetting FOR the altitude, but that would only be a slight difference in jet sizes, not close to the 10 or some sizes as Srinath pointed out; Altitude jetting wasnt not the question that was asked. As YOU pointed out, he asked if the bike will need rejetting. YES IT WILL! You can get by with it without rejeting for a short while like I did, but you're only hurting the bike and it will run like CRAP!
P.S: I took my GS from Albuquerque, NM at 6k ft, to Boston, MA at sealevel. I noticed no change in performance. The only change was when I removed the airbox for the pod filters & the bike ran like crap.
Quote from: l3uddha on August 24, 2006, 04:51:21 AM
Quote from: makenzie71 on August 23, 2006, 03:22:54 PM
He asked if he needed to rejet...it likely won't be necessary to do such a thing. I'm sure he already knows that without propper tuning he won't see the full benefit of any modification. Telling someone that the necessity is lacking is far different from telling them that it's the best way.
Altitude has a LOT to do with jetting...I have an XJ with turn downs and OPEN carburetors that runs phenominally on the stock jetting here, but in houston I can't even get it to start. How can you think altitude has nothing to do with it?
Mak... I'd love to know where you get an idea like this. Have you done the pod filter/lunchbox mod for the GS and kept the stock jets yourself? I have.... and I'm telling him YOU MUST REJET OR ELSE THE BIKE WILL RUN LIKE SH*T! It has nothing to do with altitude. It has nothing to do with getting a big performance gain out of the new filters. If you do the mod the bike will need rejetting; plain and simple. You can then fine-tune the jetting FOR the altitude, but that would only be a slight difference in jet sizes, not close to the 10 or some sizes as Srinath pointed out; Altitude jetting wasnt not the question that was asked. As YOU pointed out, he asked if the bike will need rejetting. YES IT WILL! You can get by with it without rejeting for a short while like I did, but you're only hurting the bike and it will run like CRAP!
P.S: I took my GS from Albuquerque, NM at 6k ft, to Boston, MA at sealevel. I noticed no change in performance. The only change was when I removed the airbox for the pod filters & the bike ran like crap.
I think that's his point. It will run, but it will run like shaZam!. If it runs, there isn't a need to rejet, even though it will run like shaZam!. Jetting will help it run better, yeah.
Mak... 6,000 to 8,000 Feet? HAHA I knew something was fishy about that in Texas. I looked it up. Your home town is 177ft. and Houston is only 43ft. in elevation. Eh... thats close to 8,000. Sheesh. I live Wikipidia.
-Anti 8)
twit...you need to abandon wikipedia. Gruver, TX is 3600ft...and I ride ALL over TX, not just my driveway.
Twit? Apparently ther is wrong info on the net. Not just Wiki. It's wrong all over. Any, I appologise for other peoples ignorance, but there is no need for name slinging. So how does 3,200ft, which appears to be the average of the other els. I found, fall into 6 to 8 thousand? (I had to :icon_mrgreen:)
-Anti 8)
This thread is great. :laugh: :laugh: :laugh: :laugh: :laugh:
Actually the majoraty of the state is closer to sea level...but you're right. I only ride at the average. I magically float through the air anytime the elevation drops...riding above the average tends to be troublesome.
Names-calling involves intent to insult without basis, which has not occured. You're a twit not because there's incorrect information on the internet, but because you chose to believe that information over someone who lives here. Twit.
OH SNAP!
:laugh:
isn't it also wrong to assume that removing an airbox wont require rejetting to get the bike to run properly, on altitude differences alone? by assuming you've made an ass of yourself. ass.
:laugh:
j/k I love you
The highest point in Texas (Guadalupe Peak) is over 8,000 ft. Ft. Davis, TX has a higher elevation than Denver. Near the Gulf coast, many towns are very close to sea level.
I can't help with the jetting question, but as a native Texan, I must correct misinformation about my home state! Because of its size and location, it has more variation of ecosystems and terrain than perhaps any other state. No brag, just fact.
And Texans have lots of facts. Just ask us.....
wierd... I was under the impression that only steers & qu##rs come from Texas :icon_mrgreen:
you guys must love that line :laugh:
Quote from: l3uddha on August 27, 2006, 10:23:50 AM
isn't it also wrong to assume that removing an airbox wont require rejetting to get the bike to run properly, on altitude differences alone? by assuming you've made an ass of yourself. ass.
:laugh:
j/k I love you
$10 to anyone who can point out where I said it'll run propperly without rejetting. $100 goes to anyone who will print the following quote and staple it to his balls:
"I'm sure he already knows that without propper tuning he won't see the full benefit of any modification."
Mak you're so cute when you get mad! :laugh:
Mak, you are too much. I'm not going to get mad over this despite your best efforts. Did you see the thread about Wikipedia? It's a valuable source of information, and the fact that you live there doesn't mean you know shaZam!. I do commend you though for knowing your elevation. GOOD JOB! But... you did say he won't need to rejet, which is what this comes down to. You will need to rejet. end of story. :cookoo:
-Anti 8)
Is there a way to subscribe to a thread on this forum? ANTI IS ON FIRE. Jesus, I would Pay-Per-View this shaZam!.
-Turd.
Quote from: Turd Ferguson on August 28, 2006, 07:51:39 AM
Is there a way to subscribe to a thread on this forum? ANTI IS ON FIRE. Jesus, I would Pay-Per-View this shaZam!.
-Turd.
screw the thread, I wanna subscribe to Anti! :laugh:
I don't know a shaZam! about Texas, but rode a 300 miles trip to the beach and back, from an elevation of 7,500 with peaks of 10,000 ft to sea level with stock jetting, pipe and filter, only noticed more punch on the sea level but bike performed well all the time, now with lunchbox and 150 mains mileage dropped from 18 km/l to 14 and bike smells funny, and has a lot of flat spots and full throtle issues, then changed to 145 mains, better mileage, still flat spots...
that sounds like a case of improper jet selection.
I have the 01+ carbs so it's a little different, but my jet sizes are in the signature & the bike runs sweeet :thumb:
that is with pods & the stock exhaust.
before that I ran without rejetting for a few weeks & the bike SUCKED!
when I was actually rejetting I was running a little bit rich before I fine-tuned everything, and that was very boggy as well... but a different kind of bogg. Once the proper jets are selected, the needle is shimed properly (on your carbs) and the mixture screws are set right, the bike will run great.
http://www.imotorgear.com has lunch box filters (RU-2970) on special for US$24.38
Was going to pick one up myself till I found out shipping to Australia was nearly US$60!!! :cry:
So yeah, its a good deal for you Americans if their local sipping prices are reasonable.
http://www.imotorgear.com/discountpage.asp?source=&