Mistake???

[blazed426]

Ok let's see here....I have a pre 600, it was running perfectly fine and today stopped by a yard sale and much to my surprise there were two K&N filters for my bike...unlikey find huh......anyways I get home take the tank off, fairings, all that stuff then the airbox. I put the filters on, which I had to take the carbs off to do for some reason...sucked. I then put everything back together and back on and took it for a little ride. The problem is a big time hesitation when you try to open it up, it still goes but you can hear and feel the hesitation and I don't know what the problem is. Would the filters cause it or is it possibly something else, does it need jetted now or?? Any advice much appreciated.

[HemiKat]

Yes it needs jetted. You added a lot more air into the engine but not anymore fuel. It was probably pinging at higher rpms, wasnt it?

Most people dont like K&N's on here. I like mine, but tuning is a PIA. If I had to do it again, Id probaly keep everything 100% stock. (I say that, but knowing myself I wouldnt be able to keep it that way.)

[jetmerritt]

You need to re-jet big time, the new filters have totally changed the air fuel ratio, it's not like a car where you can chuck a K&N in and go.

[blazed426]

Yeah I'm finding this out. It also has a Vance & Hines ss2r exhaust and it has had 6 inches cut off of it and no packing so that prob. is a factor too huh? How much would it be at a dealership to get it jetted and wander how long it would take. How hard is it to do?

[jetmerritt]

I wouldn't ride it as is, you are probably running so lean "as is", you could fry the engine. At least get your stock air filter back in... When an engine is lean it gets really hot in the combustion chamber and if it starts pinging bad things happen.

Maybe?

[blazed426]

I hate when I do dumb stuff lol!!! I would like to keep the filters on and just get it jetted but money is tight right now and I don't know anything about it really. I need some info on the cost of parts and labor, I hate to take it to a stealership but idk. Anyways I will take the advice and not run it like it is I guess.

[Kreylyn]

I hate when I do dumb stuff lol!!! I would like to keep the filters on and just get it jetted but money is tight right now and I don't know anything about it really. I need some info on the cost of parts and labor, I hate to take it to a stealership but idk. Anyways I will take the advice and not run it like it is I guess.

Even with a jetkit, it will be almost impossible to fine tune with pod filters so the bike runs well at all rpms.

Krey

[skelley5]

I have an almost new K&N air filter sitting in the garage right now for that same reason. Wish I knew about KR prior to that purchase because I would have never bought it.

[loudnlow7484]

Even with a jetkit, it will be almost impossible to fine tune with pod filters so the bike runs well at all rpms.

Krey

And certainly not by your average dealership bike tech..... You would need to find somebody who really knows how to set up bike carbs. I'm sure there are plenty of really good dealership techs out there, but the majority of them I wouldn't entrust with something like that.

[SweetLou]

Even with a jetkit, it will be almost impossible to fine tune with pod filters so the bike runs well at all rpms.

Krey

I have had no problems

[il_ragazzo]

my bike had a k&n when i bought it..... when i rejetted my bike last summer i got the stock filter.

+1 point for EFI.

[Kreylyn]

I have had no problems

You have a different beast with different cams, it would be a different experiance for you...

Krey

[Wild-Bill]

My bike had issues when I bought it, too but that was with a single K&N in the stock airbox. Got better when I went back to the stock filter. As for re-jetting, there's a lot of hours of billable labor involved with tweaking that in. That's at $75 or so an hour! Unless you REALLY want those extra 2-3 hp or feel up to doing the tuning yourself you're way better off just going back to the stock intake. Keep in mind, no matter what you do to the engine, you've still got a mild steel frame with a moderately long wheelbase and relaxed suspension. If you really need to go faster, get either a bigger bike or a lighter one.

[HemiKat]

Even with a jetkit, it will be almost impossible to fine tune with pod filters so the bike runs well at all rpms.

Krey

I have full exhuast and pods and I couldnt do it. I consider myself a pretty compitent mechanic and I couldnt get it perfectly tuned. I ended up taking it to a shop with a Dyno and a five gas anaylzer. Well worth the money though.

[DClark]

Sounds like people are mixing up :
1) K&N pod filters
2) K&N drop in filter.

K&N pods are hard/impossible to dial in for reasons already stated.
K&N drop in filter hard to dial in, I think it is possible. I thought that dynojet kit was designed with the K&N drop in filter in mind. I used this combo for years. Then again, I never got it just right and it is off the bike.
Dale over Holeshot has a jet kit that works with a K&N filter. Then again, he's Dale and a tuning god.
As for the K&N drop in, I modded mine and might one day try it out to see if it works. The mod was to take a rubber carb boot, stick it through a rubber donut in the filter. It will act as a sort of velocity stack to reduce turbulence. I have a brand new Suzuki filter in there, but one day if i get even more bored than the day I did the mod, I'll drop it in and give it a try.