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Discussion Starter · #1 ·
Ordered and recieved a K&N clamp on from HyperRacing.com, but still waiting for HPD to unveil their pipe. Called them last week and they said it should be this week or so, but I'm not holding my breath. Anyway, I'm wondering if it would do me any good to put the K&N on with my stock exhaust? Anybody notice any gains at all from this? Did you have to mess with the jetting? Thanks in advance!
 

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im in the same boat, needed a filter and decided not to mess with gettng a stocker while i save up for pipe, guess we willknow sooner or later how it goes, im going to rejet mine mildly to start, id rather run a little rich than lean and fry some ****
 

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Discussion Starter · #3 ·
Yeah, I think I will probably put it on and then go and do some spark plug check runs. I have a 155 main that I just took out of the Z400, that may be too big but we shall see, hopefully in the next couple of days I can get to it.
 

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I tried to get this same info awhile back. Basically, the consensus was not to bother with the clamp on without a new pipe and jet. I never did get a good answer. Maybe noone really knows. I haven't put mine in, hadn't had time to really mess with it. I also don't have the expertise I'd like to have regarding it either. That was one reason I was asking on here. Good luck, and please post if you figure it out.
 

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I have the slip on K&N with the stock pipe, what a difference. I'm running the dynojet kit with a 170 main and the [email protected] rips. stands straight up in 3rd with no problems. I'm thinking about pulling the end cap off my stock pipe until I get the loot for the W/B pipe. Wait until you hear how loud the intake noise is with the slip on filter.
 

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Discussion Starter · #7 ·
Dang, now I have to try it. What elevation are you at? Don't know if I will get the DynoJet kit, but what slot on the needle do you have the clip set at? Thanks too for the info, I will let everyone know how it goes..
 

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I run a K&N dierct to carb with our Predator and Trinity pipe..runs like a raped ape.....:)
 

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ripper, i have the end cap off my stock pipe now with no slip on and in my garage it bellers pretty good, might need ear plugs after the clamp on huh? what kind of elevation are you running to use the 170, i was going to start with something a lot smaller than that, but maybe ill bump it up a ways. P.S. what are you all paying for jets? my dealer is trying to get 7.95 for a pilot, sounds awful high to me, maybe not. if i can get jets after work ( 2 am to 10 am) im planning on screwin around with it this afternoon, also i grasp the whole jet changing thing, but wheres the needle and the clip i hear about all the time, will this affect me if i leave it alone?
 

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Discussion Starter · #10 ·
The clip is on the needle, which you get at by taking out the two screws from the gold color diaphram cover on the very top of the carb. Take out the rubber diaphram, and the molded plastic piece underneath is the slide assembly. you can just take the whole thing out, pull the plastic needle topper holding the needle in, and then you can turn it upside down and dump the needle out. Be careful to do it slow so you don't loose parts and can see the order of all the little spacers and such. Its really easy actually. I did it for the first time this last weekend on my wife's Z400, which has the same type carb only smaller. There are great directions with pics for those that don't have service manuals at this site:

http://www.albaaction.com/service/z400pipe.htm

Incidentally 170 sounds high to me too, most are running 170 WITH aftermarket exhausts...but if it works for you, rock on. I put the clamp-on on last night, and you're right, it is louder just from the intake noise. Didn't get a chance to run it around though, so no report yet on power increase or jetting.

Oh yeah, I posted in another thread, but the Suzuki dealer RAPED me 9.99 for a main jet....the polaris dealer wants 3.25 I find out after the fact....still looking online for cheaper yet...
 

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Vortec, I run at sea level in New Jersey. The reason I went with the 170 is because thats what most people were running with the slip on K&N and I figured I'd rather be a little on the rich side than too lean. Runing lean burns up pistons, a little rich at worst will foul a plug. But it doesn't blow black smoke or anything so I imagine it's close to where it wants to be if not right on the money. I'm not the biggest believer in checking the plug after each jet change, it's not accurate enough in a single cylinder engine IMO. I haven't yet pulled the end cap off yet with the jet changes, I might try it tonight. For you guys debating the Dynojet kit, I don't think it's worth the jingles, I was pressed for time when I bought it and I think the scumbags at my dealer were just blowing smoke when they said they didn't have individual jets so they could rip me off for $65. I have it set up in the stage 3 configuration (God, sounds like a fast and furious ad) but thats the dynojet needle in the #2 position, 170 main jet, I cut 5 coils from the spring, drilled the slide holes to 1/8", and my 50 pilot jet is on the way, and 3 turns out on the mixture screw. Hope this helps you guys. Oh yea, if you do all this, hold on tight, 2nd and 3rd gear are completely different
 

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2minInstigating, you said you took the jet out of your Z400, are those jets the same on the pred? i just put an edelbrock on my Z and have a lot of jets for it! i have not attempted to jet the pred yet and do not know what style jets they are?
 

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Discussion Starter · #13 ·
The Z400 jets and the Predator jets are the same, 99% sure. Mikuni small round. I am planning on trying the 155 main I took out of the Z in the pred with the clamp-on, after getting some spark plug readings. Sounds like you may be set up, except that the jets you have may not get big enough for the predator. The 155 main I took out was with no airbox lid, K&N, open end on Alba full headpipe and muffler. Stock on pred is 150 main.
 

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i have done the research by doing the mods. my self and got more power out of the k&n slip on. way fast. i used the jets that come with the airforce kit took the air box off. dont no what size the pilot jet is cause the size is buffed off and used the number 1 main jet allso the size is buffed off. looks like maybe 170.
 

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well today i got my slip on done and jetted with a 165 for now, just dropped it in and ran with it, works great for a blast down the street, havnet messed with the needle clip, though after re-reading this post thats where im headed to now. im super impressed how after 50 bux (filter and outwerars) and a 4 dollar jet it makes SUCH a difference, i can now bring my front off the ground with no effort at all. cant wait till its all tuned then i can really go smoke my friends at home. saving up for my pipe as of yet looks like its going to be an aaen, claiming a lot of gain for nto so much $$ but by the time i buy maybe sonene else will impress me more. thanks to everyone who has helped with this whole thing especially localbuzz and 2mininstigating i owe you guys a beer
 

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i also grew the balls to cut the spring and drill some holes, pretty snappy now to,,god i really gotta get me a pipe now!
 
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