SuzukiSavage.com - Print Page

SuzukiSavage.com
/cgi-bin/YaBB.pl
General Category >> Rubber Side Down! >> K&N Filter vs Stock
/cgi-bin/YaBB.pl?num=1399828404

Message started by ihasabike on 05/11/14 at 10:13:24

Title: K&N Filter vs Stock
Post by ihasabike on 05/11/14 at 10:13:24

The previous owner put a K&N filter and short pipe on my S40. I already had the stock pipe put back on and the carb rejetted. I find that the bike runs a bit rough at low RPMs, and I am wondering if the K&N filter might be the culprit, and I might want to put a stock filter back in it. Any thoughts?

I also noticed the belt is set too tightly. I can only twist it 45 degrees instead of 90. What symptoms does a tight belt cause?

Title: Re: K&N Filter vs Stock
Post by Serowbot on 05/11/14 at 11:02:22

A K/N shouldn't cause any rough running... I have one, not for performance but to save money... (they're washable)...

Too tight a belt, will cause noise mostly...
...way too tight, can cause enough resistance that it slows the bike when the suspension is compressed on bumps...

Title: Re: K&N Filter vs Stock
Post by pgambr on 05/11/14 at 11:15:48

I really like my KN drop-in. It runs better and washing it is easy. I never quite under stood why some people don't like it?

Title: Re: K&N Filter vs Stock
Post by S-P on 05/11/14 at 12:33:29

Do you have the original stock petcock? That might be causing the rough idle too.

Title: Re: K&N Filter vs Stock
Post by ihasabike on 05/11/14 at 19:03:18

Maybe it is just a gearing issue. On other bikes, I'm used to being able to slow down and turn at intersections in second gear (at about 10-12 mph), without having to drop into first. But I find that if I try that on the S40, it jerks repeatedly until I speed up to closer to 20mph. Is that normal on these bikes?

Title: Re: K&N Filter vs Stock
Post by justin_o_guy2 on 05/11/14 at 20:24:44

Yep,, 2nd gear is a pretty good jump from 1st. Far enough to dissuade my clutchless shifting between those 2 gears. 2nd thru 5th, up & down, no clutch needed, but dang,, not 2 to 1 or 1 to 2,,nooo thanks,,

Title: Re: K&N Filter vs Stock
Post by S-P on 05/11/14 at 20:41:00

3E3F362436353E3C32570 wrote:

Yeah, I get caught doing that too trying to take a corner in second gear. I usually slow down a little more and drop it into first.

Title: Re: K&N Filter vs Stock
Post by WD on 05/11/14 at 20:57:19

Keep it in second, slip the clutch and keep the rpms up. Savage engine/gearbox is a loose clone of the old Norton Manx racing single. It likes throttle.

K&N is a good item. Keep it oiled, clean it once a year or so unless you live in a high pollen/dust area.

Turn your airscrew out another 1/2-1 turn.

Unless you live in New England, the upper midwest or the Pacific North Wet, it is summer time. So run your bike on 15W40 or 20W50 oil, it will be a lot happier and so will you. Less noise, less vibration, smoother shifts, better seat of the pants feel.

And never let the stealership see it again, let alone touch it. They WILL FUBAR it...

Title: Re: K&N Filter vs Stock
Post by ihasabike on 05/12/14 at 05:32:50

OK, I'll try more throttle.

Title: Re: K&N Filter vs Stock
Post by CHANMAN on 05/13/14 at 15:37:55

So do you guys advise a cone or a slip in k&n?

Title: Re: K&N Filter vs Stock
Post by Serowbot on 05/13/14 at 15:43:53

Slip-in's are best, more surface area and more stable air ... cones are an option for the bobber look...

Title: Re: K&N Filter vs Stock
Post by ihasabike on 05/13/14 at 17:11:02

I tried more throttle and works OK.

I'm wishing this thing had more gears, and wondering if there is a drop in transmission or some kind of way to get more gears that will give me a smooth second gear in low turns and lower RPMs when cruising on the highway at 75mph. I'm going to start a new thread to ask about that.

Title: Re: K&N Filter vs Stock
Post by CHANMAN on 05/15/14 at 21:57:30

6472657860757863170 wrote:

Slip-in's are best, more surface area and more stable air ... cones are an option for the bobber look...

Ordered my slip in on wednesday. It will be here tomorrow morning 8-)

Title: Re: K&N Filter vs Stock
Post by LANCER on 05/16/14 at 04:33:31

6D6C657765666D6F61040 wrote:

More gears ... drop in trans ... low 2nd ... low rpm cruise .......... remember, this is a LOW tech single; 50's/60's vintage technology; no factory upgrades available; aftermarket companies virtually ignore it; when it comes to gearing the only quick & easy change is to go with a chain vs the belt, but that just moves everything up or down. There are no gear sets available unfortunately.
If you go with the chain and gear it for an easy cruise on the highway, then 1st gear might be in the range you want for making a slow turn the way you want.