Air filter.

[findlay13]

Just posted this in BA forum but I'll ask here too.More opinions the better.
I've just installed a K&N filter and it's an improvement but I was wondering if I cut back the snorkel which goes down into the middle of the filter quite a way to an inch or two would i see more improved air flow or not enough to worry about.
Anyone have any experience with this?

 

[MattRat]

just pull the snorkel out? I lost mine at 600 miles...seemed like it was flowing better...

or go all the way and get rid of the whole airbox.

 

[ssjones]

If you are looking for a SOTP improvement, changing the filter and removing the snorkel won't yield that kind of result.
What exhaust are you running?

 

[mrt202]

Lose the snorkel altogether! Why would you want to keep it in?:huh:

 

[findlay13]

Thanks for the replies.I'm running "Maddaz'' pipes.I tried her yesterday with the snorkel out and it ran a bit rough.Put the snorkel back and it's running good, so until have another service/tune up/and maybe re-jet then at about another 5,000ks.I guess I'll leave as is.

 

[mrt202]

If the snorkel makes that much difference, you're probably running way too lean. I don't think i'd wait that long before rejetting!

 

[findlay13]

Yes I'm off to the mechanics tomorrow.I'll get him to check it all out.

 

[Gregger]

What you are noticing is exactly what I had when I pulled my 3 snorkel tubes in combo with TOR pipe install. The engine would bog on acceleration. Way too lean. I started with 120 mains and ended up with 135s. I also had installed a couple of shims under my needles to help with the mid range and switched to TBS needles. Mine runs a lot better than stock.

One way to check your jet size is to put the bike in 3rd or 4th gear and accelerate at full throttle (over 5000 rpms) for a few moments then back off on the throttle a small amount. If your bike seems to pick up speed then you are too lean on the mains. The opposite is also true.

 

[findlay13]

Thanks Gregger.I think I'll get it dyno tested next week.I went to the mechanics today but he was snowed under with work.I'll be in touch with him next week too.

 

[findlay13]

Finally I got around to pulling the snorkel and a dyno run.It was fine as it'd been done when the pipes and AI were done .it only needed a shim on each carby needle.It runs fine now.:headbang2: