It's been a little over a year since I started riding, and I finally rode some bikes other than mine, so I now have enough experience to realize that my bike isn't running as best as she could. I searched the forums here for rejetting advice and decided that I'd go with the 40/147.5 setup. It seemed like she was bogging down at about 2/3 throttle to WFO, so last week I took out a washer on each needle (there were two on each) and not it's just WFO that's giving me issues.
Anyway, I went into a local dealer a little while ago and asked for a pair of 140 main jets. (This was before I pulled a washer from each needle by the way) The guy behind the counter mentioned that he normally works in the service dept and asks what I was using them for, maybe he could help. When I told him my situation and what size the stock jets were, he looked at me like I had a gnome with a misshapen head growing out of my face and proceeded to tell me that I NEED to get a jet kit and that a 140 was WAAAY too big. I said "but they don't make kits for stock exhausts," and he almost lost it. Apparently I'm an idiot for believing anyone on the internet and for thinking that a lunchbox would do anything with a stock exhaust. I mean, really, more air in - more air out. It's that simple. Right? (Is your sarcasm meter pegged yet?)
Actually, that last part did kinda make me second guess myself, so I ended up walking out emptyhanded. I don't have the money to spend on an exhaust right now, so I let him think he was a genius and said that I'd just go ahead and return my bike to stock until I could buy and exhaust and a jet kit like a good boy. I feel like such a douchebag. Whatever.
What I'm getting at is, i don't really think that an aftermarket exhaust is going to be so much more free flowing than the stock setup that it'll make THAT big of a difference. For what it's worth, a previous owner drilled four holes in the back of the exhaust, so I guess it's a little more free flowing than stock. I'd love to get an aftermarket exhaust, but it's not in the cards at this time. (You hear that Jardine folks? you know what to send me for my birthday...) But still, anyone that wants me to spend $100 on a jet kit when I can do the same thing for about $30 can kiss my ass. "But the dynojet folks have already done the research...you'll never get it right!!!" he says...bite me. Does anyone know what size jets they put in the jet kit anyway?
Sorry for the rant, but I needed to get that out. Long story short, do any of you folks who has been around these bikes for a while (dgyver comes to mind first) also think I'm crazy for wanting to do this with a stock exhaust? Should I just hold out for a new exhaust, or is this all just a bunch of bullshit that I'm worrying about for nothing. If you've actually read this far, thanks - I feel better.
Good Job!!!
JEt kits suck ass, and Dynojet kit is terrible
If he wont sell you the jets, then order them offline. Look up the rejet matrix in the FAQ to figure out your needs.
With that said, however, you will not free up much power with the stock exhaust still on there, and may make it a Buddha Loves You to jet
I have heard 145 ... but how bad is the bog ... and tell me this ... did it get better in winter (and dont tell me you live in florida) and get worse in summer ... summer to winter gap is about 1 jet size in most of southern US, 2 sizes in most of the north, and prolly 3 in alaska ... so if it ran well in winter ... and you're south ... then drop 1 size, if northern, drop 2 etc ... just a guess ... somewhere in there is your ideal main jet ...
You want me to dig through my odd collection and send you some ... whatever you use, you can like replace and send it to the next guy ... we'll start a "jet kit" like a valve adjustment kit ... Or start drilling the old ass 122.5's jets I have lying about
Cool.
Srinath.
I'm going to do a lunchbox/rejet with stock exhaust, until I can get a decent slipon (Buying an old srinath flange from someone.. need to find a can)
I don't think you're crazy. Just a rejet helps a lot, a rejet + lunchbox will do some good.
Quote from: NiceGuysFinishLast on April 02, 2007, 08:58:48 PM
I'm going to do a lunchbox/rejet with stock exhaust, until I can get a decent slipon (Buying an old srinath flange from someone.. need to find a can)
I don't think you're crazy. Just a rejet helps a lot, a rejet + lunchbox will do some good.
The srinath flanges have a black market now ... its like in the year 1900 you could order heroin out of the sears catalog. Now its like got a gazillion bucks street value.
Like that right ... :thumb:
My first 2 batches were awesome. The round plates were offset torched and hand welded ... they fit well, exited high and overall were so freaking hard to make and very good cos it was all hand made on a bike ... the recent 2 were jigged and slapped together with end plates that were laser cut ... lost a lot of the old artisty thing. The first set had conical head bolts with countersunk bolt holes and thick plates for the can to bolt to ... cool sheite ... but mistakes and wasteage was insane as was the time it took on each. Mass production is better ... but again no one here melts over a Ford taurus ...
Cool.
Srinath.
I had a lunchbox/rejet with the stock exhaust for 3 or 4 months, then added a higher flow exhaust can later. Honestly...the can didn't really do anything by the seat-of-the-pants meter. The lunchbox/rejet made a very noticeable difference. It seems on these bikes that the intake is far more restricted than the exhaust.
No surprise that someone at the dealer gave you crap for doing it yourself and getting your information from an internet community. They all pull that crap. When I go into the dealership (rare...very very rare...) I give them very few details on what I'm buying the parts for, but I insist that I know what I'm talking about and know exactly what I want. Bring in part #'s and don't leave without getting what you want!
BTW, Nick, you bought 147.5's for a lunchbox with stock exhaust? I ran 137.5's with my lunchbox/stock exhaust set up and it ran extremely well. Methink's you'll be way rich above 6k.
-Turd.
Quote from: seshadri_srinath on April 02, 2007, 09:08:31 PM
Quote from: NiceGuysFinishLast on April 02, 2007, 08:58:48 PM
I'm going to do a lunchbox/rejet with stock exhaust, until I can get a decent slipon (Buying an old srinath flange from someone.. need to find a can)
I don't think you're crazy. Just a rejet helps a lot, a rejet + lunchbox will do some good.
The srinath flanges have a black market now ... its like in the year 1900 you could order heroin out of the sears catalog. Now its like got a gazillion bucks street value.
Yeah, I'm getting it from an old member here, The Lazy Destroyer, along with a 15t sprocket, lunchbox, some jets, some plugs, and a few other misc. things for $50
Quote from: Turd Ferguson on April 02, 2007, 09:17:26 PM
BTW, Nick, you bought 147.5's for a lunchbox with stock exhaust? I ran 137.5's with my lunchbox/stock exhaust set up and it ran extremely well. Methink's you'll be way rich above 6k.
-Turd.
I most likely do the lunchbox/rejet till I have a can too, and that setup is what the wiki recommends for a slipon/lunchbox... That's why I ordered the larger ones, so I don't have to rejet twice (and pay for a rejet twice).. and if they're too big then, I'll swap em..
Quote from: NiceGuysFinishLast on April 02, 2007, 09:21:13 PM
I most likely do the lunchbox/rejet till I have a can too, and that setup is what the wiki recommends for a slipon/lunchbox... That's why I ordered the larger ones, so I don't have to rejet twice (and pay for a rejet twice).. and if they're too big then, I'll swap em..
:thumb: Good thinking! You'll love the jets you're getting. Everyone who has that set up (*ahem* Dave's old bike *ahem*) with lunchbox/exhaust loved how the bike ran.
[/threadjack]
Quote from: Turd Ferguson on April 02, 2007, 09:24:12 PM
Everyone who has that set up (*ahem* Dave's old bike *ahem*) with lunchbox/exhaust loved how the bike ran.
Well damn.. now I just feel like an @$$hole.. fortunately, dave's bike will be paid off with my next check, this friday. I think.
Quote from: NiceGuysFinishLast on April 02, 2007, 09:33:44 PM
Well damn.. now I just feel like an @$$hole.. fortunately, dave's bike will be paid off with my next check, this friday. I think.
Are you paying off his deductible? You're a good man, man! :thumb:
Wait... [/threadjackagain]
Quote from: Turd Ferguson on April 02, 2007, 09:17:26 PM
BTW, Nick, you bought 147.5's for a lunchbox with stock exhaust? I ran 137.5's with my lunchbox/stock exhaust set up and it ran extremely well. Methink's you'll be way rich above 6k.
I made the mistake of trying to put 147.5 mains with that setup (lunchbox + stock exhuast) and my bike wouldn't run above idle. Now I'm using 140 mains, and I think it's still rich. I'd say 137.5s sound like the way to go.
Quote from: Turd Ferguson on April 02, 2007, 09:43:20 PM
Quote from: NiceGuysFinishLast on April 02, 2007, 09:33:44 PM
Well damn.. now I just feel like an @$$hole.. fortunately, dave's bike will be paid off with my next check, this friday. I think.
Are you paying off his deductible? You're a good man, man! :thumb:
Wait... [/threadjackagain]
Of course I am, what kind of a dork would I have to be to not? If he hadn't had full coverage, I'd pay off the whole bike, if necessary (in many, many small payments :laugh:).. of course, if he hadn't, I probably would have never borrowed it..
Quote from: LostDog on April 02, 2007, 09:45:57 PM
Quote from: Turd Ferguson on April 02, 2007, 09:17:26 PM
BTW, Nick, you bought 147.5's for a lunchbox with stock exhaust? I ran 137.5's with my lunchbox/stock exhaust set up and it ran extremely well. Methink's you'll be way rich above 6k.
I made the mistake of trying to put 147.5 mains with that setup and my bike wouldn't run above idle. Now I'm using 140 mains, and I think it's still rich. I'd say 137.5s sound like the way to go.
Wait, the 140s are too rich with the stock exhaust or a slipon? Cuz my jets that I ordered are gonna go in with a lunchbox and a slipon
Quote from: NiceGuysFinishLast on April 02, 2007, 09:50:01 PM
Wait, the 140s are too rich with the stock exhaust or a slipon? Cuz my jets that I ordered are gonna go in with a lunchbox and a slipon
That's with stock exhaust.
Quote from: LostDog on April 02, 2007, 09:53:03 PM
Quote from: NiceGuysFinishLast on April 02, 2007, 09:50:01 PM
Wait, the 140s are too rich with the stock exhaust or a slipon? Cuz my jets that I ordered are gonna go in with a lunchbox and a slipon
That's with stock exhaust.
Ok.. I'm saving the lunchbox/rejet until I can find a can for my flange to do a slipon too... Seems some think I only need a 145s with the can/lunchbox.. we'll see.. I can always swap em later if I need to..
I have no idea how it would run jetted with 147.5's, lunchbox, stock exhaust. But, I did my can first, rejetted to the 147.5's, and my bike would barely run... with that said, most of the change has to come from the lunchbox. With the lunchbox, Yoshi can, and jetted to 147.5 my GS is perfect.
I'm just waiting for this guy I know to wreck his gixxer1000, then I'm gonna cannibalize whichever can isn't trashed :thumb: (yep he paid cash so he wouldn't have to carry comp&coll, and it's a first bike, so it's just a matter of time, i just hope he doesn't hit the ground too hard, i don't want him hurt too bad just enough to knock some sense into his head) Those short CF cans look awesome!!!! :thumb:
((
Thanks for the replies everyone! I'm gonna call the dealership today and see if they have the 140s, since I've heard of people running anything from a 135 to my 147.5 and I'm not sure exactly how close I am at the moment. I figure the 140s are a good compromise and will give me the best idea where to go next if it doesn't turn out to be spot on. I was pretty sure that the stock intake was more restrictive than the exhaust, thanks for confirming that.
Well, the dealer says they'd have to order them, I'm not sure why I thought they might have them in stock...I might call another place.
Or...Srinath - I just noticed your offer when I was looking back over the thread. If you wouldn't mind, maybe we could work out details through PMs or emails?
I just ordered the parts to do the same thing to my bike, lunchbox, re-jet but keep stock can. Getting a 44-t rear spkt too, already dropped a tooth in the front. Hopefully within a couple weeks I"ll have everything in (ordered main jets from 140-147.5, just so I've got some room to tweak) and I'll be able to contribute. Was glad to hear that you do get a performance gain without having to shell out for the exhaust!!
By the way, did you get this done? How is it running??
I have a Cobra F1 exhaust the previous owner welded on ... the bike runs great (faster than any other 500cc'ers i've been around ... more acceleration than many stock 600cc'ers I've ridden with) . Should I assume they've rejetted ? It still has the stock airbox and i'm looking at the K&N filter , just not sure if I have to rejet . Keep in mind , i'm terrified of working on the carbs (never even worked on car carbs even) .... if it didn't HAVE to be rejetted with the new exhaust , how bad would it be to just try putting the K&N on ?
Anbother question ... in a previous thread , someone said that the K&N's just slip on in place of the boot to the airbox ... are the K&N filters the same as a "Lunchbox" I've seen referred to around here ?
Sorry to hijack , it just seems that the "people in the know" are responding here , and the info may be pertinant to your issues too :thumb:
^^
Quote from: smoker on April 29, 2007, 08:00:00 PM
By the way, did you get this done? How is it running??
Actually, I just got the 140s the other day and haven't had time to swap the 147.5s out. I'm also getting a used V&H exhaust in soon, so I'll have that to add on as well.
I think I'll go ahead and rejet before I install the new exhaust, if for no other reason than to see what it would have been like had I not bought the exhaust. Maybe in the next couple days I'll get the chance to swap the jets. I'll let you folks know...
Yea, I'd like to hear the results too. I want to pick up a lunchbox (not even for power, just so that I never have to wrestle the stock airbox back into position again) but uncertainty about the proper jetting w/ stock exhaust has kept me from doing it.
Does The New Airbox Increase Better Sound .. Eg I No With A Skyline , U Can Hear It Growling And Sucking In The Air... Im Sure Ive Just Answered My Own Question ....
Jay
Quote from: Jay_wolf on May 01, 2007, 05:06:20 PM
Does The New Airbox Increase Better Sound .. Eg I No With A Skyline , U Can Hear It Growling And Sucking In The Air... Im Sure Ive Just Answered My Own Question ....
Jay
Yeah, there is quite a bit of intake noise with the K&N Lunchbox. It actually sounds really good IMO.
-Turd.
Any of you guys get this set up with the stock can since the thread started? How do the plugs look? Bike run good?
J
%%
Ok, I switched out the jets the other night and went for a ride. Other than having to reset the idle speed, I didn't really notice much of a difference. I'm pretty sure this is because it was only a short ride and I don't think it got fully warmed up. I'll take it out again soon and see what happens. Also, I might have to fool with the air mixture screws since I changed them while I had the carbs off (looking back, I should've just let them be).
As far as the sound after removing the airbox - I think Turd and Wrecent both handled that question. When I first revved her up after installing the Lunchbox, the snarl surprised the hell outta me and I couldn't keep from grinning like an idiot every time I twisted the throttle that week...
I'll report back once I have a better feel for the way the bike runs with the smaller jets and a proper setup. Stay tuned :cheers:
any one think there would be a benefit to an air feed system on the GS??? Dunno maybe something cannibalized off of a SRAD GSXR :dunno_white:
Hey Wrecent,
What part of maryland are you in? If i was to meet you somewhere, could you walk me through the process of rejetting and replacing the lunchbox? (Also the best place to get it?) I am not mechanically inclined, and help never hurts
Thanks,
Chico O0
Hey Guys,
So the last few weeks I started looking into the Lunchbox. After researching, I've decided to post various Jet setups from different members of the board. As far as I know all of the configurations below use a stock exhause with the exception of Galahs.
STOCK Airfilter
--------------------
Stock: 17.5/60/130
Meaning: main=130, mid=60, and pilot=17.5
K&N LUNCHBOX Airfilter
--------------------
Wiki: 20/62.5/142.5
Alphafire: 20/65/140 -- 22.5/65/137.5 (new)
LimaXray: 20/62.5/137.5
Turd Furguson: 22.5/65/140
Galahs: 20/65/145 (Jardine Exhaust)
Let me know if anything needs to be changed or is incorrect... Hopefully this helps someone in the future... hah
JG
^^
Quote from: badguy on May 03, 2007, 10:00:24 AM
Ok, I switched out the jets the other night and went for a ride. Other than having to reset the idle speed, I didn't really notice much of a difference. I'm pretty sure this is because it was only a short ride and I don't think it got fully warmed up. I'll take it out again soon and see what happens. Also, I might have to fool with the air mixture screws since I changed them while I had the carbs off (looking back, I should've just let them be).
As far as the sound after removing the airbox - I think Turd and Wrecent both handled that question. When I first revved her up after installing the Lunchbox, the snarl surprised the hell outta me and I couldn't keep from grinning like an idiot every time I twisted the throttle that week...
I'll report back once I have a better feel for the way the bike runs with the smaller jets and a proper setup. Stay tuned :cheers:
I'm looking to do the same thing and I'd be interested to know how it turned out :thumb:
Thanks
Ok, update:
I tried a plug chop a couple days ago, and found out that the 140s are a little lean. At the time, i had the two washers on the needles, air mixture screws 2 3/4 turns out, and of course the 40/140 jets with lunchbox and stock (drilled) exhaust. It definitely FELT good, nice power, pretty smooth (except for the transition between no throttle and cracked open just a little...that's still kinda abrupt). however, I don't want to be overheating the bike.
After I got back, I put my V&H exhaust on...I felt defeated - I thought the 140 would be perfect and that I had it really close. I wanted to get the setup right for the stock exhaust, if for nothing else but GStwin posterity, but I realized that once I got it dialed in for the stock exhaust, I'd have to do it all over for the new one. I wasn't really looking forward to that. Sorry to all the folks that might have been looking to this thread for advice on setup, but if I had to guess, I'd say that 142.5s would be good to start out with.
In case anyone cares, I'm gonna try 142.5s with the V&H and see what happens (they're the size most readily available to me at the moment). Once I get it set up, I'll post in the rejetting thread.
Good luck folks!