Well after being DQ'd for this, I need to find out what to do so that it doesn't happen again. I have a K&N air filter and it apparently came with it's own top piece to the air box, since I bought the bike that way I don't have the original. Can you just use an original part with the K&N filter or do you have to get one from K&N with the same size opening as the original?
Someone please help me become legal. One time being DQ'd is all I care to have.
You can buy the stock air filter from Suzuki...or a Suzuki reseller. That is all you need to be legal. It includes the top piece you are talking about.
Yeah I saw that it is all one piece. But won't that mess up my jetting?
Which version of the K&N do you have? The one that has a real big hole? If you do, then yes, you will have to rejet. I can give you some baselines to try when re-jetting, but the best way to get it spot on is to put it on a dyno that has a EGA sensor.
Baseline jetting that I ended up using when my SV was stock (without using a jet kit) running a full M4 exhaust:
Main Jet: 140
Pilot: 15
Air screw: 2 1/2 turns out
needle: one shim under stock needle.
If you get a jet kit, then follow their instructions.
This of course varies according to the conditions, altitude, your bike, cams, cam timing, etc. My current jetting is leaner than that.
Not sure which one I have but when I compared it to one that was legal at tech didn't look very much bigger. Basically the tech guys two fingers wouldn't fit inside a stock on, but barely did on mine. So I assume that shouldn't make too much difference then huh?
Also I really have done any carb work on mine, I had 4&6 dyno tune it but it seems to be running a bit rich right now occasionally it backfires. So if that's the case, decreasing the size of the air intake to me would seem to make it run even richer. Excuse my ignorance I'm not a real good carb tuner in fact never touched the carbs. The bike has whatever jets it had on it when I bought it. It has a full system (Micro) and the K&N filter with the cover that apparently comes with the kit.
Actually, it sounds like you have the K&N with the smaller hole opening. Actually, those flow worse than stock, so you may not even have to rejet at all.
Backfiring doesn't always mean that your main jet is too rich. It could be the air screws or the needle being too rich (or lean).
Can you call 4&6 and ask them to see if they can tell you the jetting that is in it? Some shops log all their work and keep it in the computer.
Where do you live? You may want to call around some shops around and find someone who may do a dyno run for cheap. Here we have a couple of shops who do dyno runs the first Thursday of every month for something like $20.00. They can tell real fast whether you are lean or not.
BTW, The stock main jets are 138's.
For supersport, the rules are really specific.
Got to go by the letter of the law there.
If you had it done at 4&6, go back there. They use an eddy current dyno, so they can to consistent, repeatable runs.
Did you use race gas? What did they dyno it on?
Yeah I know supersport is a really strict class. I will give a call up there to see if I can find out what is in it right now for jetting. I run 93 octane pump gas in it no race fuel.
Super_Dave, not sure what you mean by what did it run on? Are you reffering to fuel? If so the best of my knowledge it was on pump gas I had some in the tank when I took it to them, and personally have never put race fuel in it. So I doubt they would put it in just to dyno it. But maybe.
Thanks for the help, I'm going to just go ahead and order the stock air filter, then put it in and see how it runs. I'll post the jetting once I have it and any adive would be greatly appreciated.
Reason I ask is that sometimes a person will put in a different fuel than what it was dynoed on. Specific gravity, oxygen content, leaded or unleaded can make a difference in the speed of the burn, the actual amount of fuel that gets in the engine, and the air fuel ratio of the combustion.
At least you can try to rule something out....
Well thanks for all the help guys, but I'm gonna let the experts handle this one. Just talked to 4&6 I'm going to drop the bike off after replacing the filter and let them take a look again at the jetting.
SS class isn't that strick they let Ed Key run his SV in LWSS. ::)
LOL, yeah, but Ed follows the letter of the rules...exactly.
That was the first thing that came to mind after they DQ'd me.
I don't see how his air box can be legal if he is running RAM air, which he is. The rule states that the air box must retain the same size, and number of openings as stock. So unless he fits those two tubes into one, then shoves them between the gas tank and the top side of the air box, that isn't legal either.
Oh well, it doesn't matter I don't think Ed wins beccause he has ram air, just like I don't think I placed second because of having an inch larger opening in the top of my air box. But that's the way it went, I'll change my bike then I don't have to worry about it, what other people have is their worries. Maybe it'll happen to them, maybe it won't
The rules say that the air box cannot be modified and that any after market air filter must have the same number and size opening as the stock filter. Ed could make a ram air box that encloses the entire stock airbox, or he could make a part that seals against the top of the airbox, covering the opening. As long as he uses a stock filter (or aftermarket copy) and does not modify the airbox (having a cover seal against the stock airbox is not modifying the stock airbox), he is legal.
I am pretty sure Ed uses the RAM Airbox that uses the bottom of the tank as a seal, so that the carburators and the airbox are all inside the pressurized area. In other words, he has 2 airboxes, the stock one, and the "pressurized" one, which wraps all around the stock one and the carbs.
Totally legal. You can buy something similar from speedwerkz.
Now that is an interesting setup, I wouldn't bother but I'd love to see it that sounds pretty cool. So basically the Ram Air tubes feed into a second air box, that basically encloses the stock one. Hmmm... that is a very interesting setup and whoever came up with it was definitely thinking. :D
Sorry to resurrect an old thread, but would removing the snorkel or replacing it with the SV1000 snorkel (which is larger, but fits the 650 airbox without modification be against the rules? i.e. is the snorkel considered part of the airbox?
To remain supersport legal you cannot alter the size of the air intake. So yes the rubber snorkel is considered part of the airbox. Changing it to the SV1000 unit or removing it would not be supersport legal.
That's what I figured, thanks!
I'VE DONE SOME DYNO TIME ON A NEW SV 03 AND I TOOK THAT SNORKLE OUT AND IT MADE 2 LESS HORSES THAN WITH IT IN!! THATS RIGHT IT MADE MORE WITH THE UGLY SNORKLE IN THE AIR BOX!!! SILLY,THE OLD SVS WERE ALL ABOUT AIR. THE MORE THE BETTER. BUT THE NEW BIKES ARE COMING OUT GOOD,ALL YOU GOTTA DO IS PUT ON A PIPE TO MAKE NOISE AND YOUR FAST!! :oHEHE