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Re:Is recalibration necessary with a K&N air cleaner?
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TOPIC: Re:Is recalibration necessary with a K&N air cleaner?
#450602
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Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
Hi Guys!

I currently have the stock air box on my 02 Roadie and I want to go with the K&N custom air cleaner.

K&N says that due to the high volume of air intake, a carburetor recalibration kit MUST be use.

So, will I have to recalibrate my carb again with another jet kit or will the Dynojet kit already installed with my V&H Shortshots do the job?

Many thanks,

RG

 
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Last Edit: 2012/01/13 18:07 By ROADGRABBER.
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#450603
Curt (Moderator)
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
You might get away with just tweaking the PMS.
 
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
The Dyna needle will work just fine, but suggest you look into the carb to see exactly what main jet was used as well as too see if the stock pilot jet was used (35 mikuni) And as far as the dyna needle if it is a 5 groove then it is of the old type, the newer Dyna needle is 6 groove. And see what groove the e-clip is on (counting from blunt end) And see where the pilot screw is set. Just turn it in to a light seat and count the turns, so to set it back if necessary.

If it were jetted previously just for pipes, it really didn't need to. New jetting is required for a after market air kit.
 
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#450700
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
Hey Erbman,

The more I read you the more it gets confusing! (donít worry itís me!).

First you say the Dyna needle should work just fine and you finish by saying that I will need to rejet my new air kit anyway!?

I do my own basic maintenance but if I need to rejet I will call upon a pro mechanic because I donít want to mess with that.

Many bikers noticed better fuel mileage with the K&N air cleaner, even up to 47 miles per gallon, is that realistic?

RG
 
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#450713
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
ROADGRABBER wrote:
Hey Erbman,

The more I read you the more it gets confusing! (donít worry itís me!).

First you say the Dyna needle should work just fine and you finish by saying that I will need to rejet my new air kit anyway!?

I do my own basic maintenance but if I need to rejet I will call upon a pro mechanic because I donít want to mess with that.

Many bikers noticed better fuel mileage with the K&N air cleaner, even up to 47 miles per gallon, is that realistic?

RG


No, did not actually say you will need to rejet. If you have been jetted due to the pipe only change, that did not have to be done on this bike to begin with. And since the bike is an 02, and I don't know when the Dyna jet kit was installed, about 4, or 5yrs ago, dyna changed their needle taper and amount of grooves for the e-clip. Needle taper and grooves makes for the way the bike needs to be jetted to some extent. Some of the other fatter needles out there also require a pilot jet change, some needles work just fine (Barons and newer DJ) with the stock pilot jet because the straight portion of the needle is not too fat. But without you knowing exactly how it is set-up it's a crap shoot. If too lean, it may not do engine damage, but it might be lean enough to discolor the pipes due to excessive heat. Happened on my first bike, with-in 15 miles, went from chrome pipes to a golden color.

I know it's a job, just to take a look see inside the carb, but the more info you have as far as the way it was jetted and what kit was used, will make a difference on what changes to make when the air kit is installed. Keep in mind, most shops jet strictly for performance. but it can be tuned to economy , or in-between the 2 as well. MPG at cruise (65mpr) 40 to 50 is possibly. if closer to the 40mpg at cruise, then it's jetted more towards the performance side, 50mpg at cruise, jetted for economy. go in-between, ya get the best of both worlds.
 
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#450717
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
I was fearful about screwing up my R* when I added aftermarket air kits. Hell I called Neil and he talked me through what I needed to look at, how to change the jets and got me running nice. Jetting isn't tough it is a bit time consuming only in the fine tuning it to get it right. Listening to the guys here and following the advice of the carb gurus like Curt and Neil and Scott, you can not only learn it but do it safely and cheaper than taking it to a mechanic.

SD
 
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Last Edit: 2012/01/14 10:15 By TheSheepdog.
 
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#450721
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
Completely agree with Sheepdog. The knowledge and willingness to help here on the clinic is A+. I know I've tested the patience of some.
 
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#450745
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
Oh dear God youíre now talking about discolored pipes!

The Dynojet kit was installed with the V&H Classic II when I bought the bike in 02. I recently replaced the Classic with V&H Shortshots.

I will finally go with the Yamaha Speedstar air filter cleaner, the chrome seems to be much better looking than the K&N cover, performnace wise it's a K&N filter so no worry there!

Iím gonna get it soon from Cruiser Customizing for CDN 185$, but I will have to wait until spring to install it, because Iím up to my knees in snow here and donít own a garage!

RG
 
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Last Edit: 2012/01/14 11:11 By ROADGRABBER.
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#450758
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
ROADGRABBER wrote:
Oh dear God youíre now talking about discolored pipes!

The Dynojet kit was installed with the V&H Classic II when I bought the bike in 02. I recently replaced the Classic with V&H Shortshots.

I will finally go with the Yamaha Speedstar air filter cleaner, the chrome seems to be much better looking than the K&N cover, performnace wise it's a K&N filter so no worry there!

Iím gonna get it soon from Cruiser Customizing for CDN 185$, but I will have to wait until spring to install it, because Iím up to my knees in snow here and donít own a garage!

RG


Ahh, so you only had a flurry. lol
 
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#450773
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Re:Is recalibration necessary with a K&N air cleaner? 2 Years, 9 Months ago  
The answer (as you've noticed) is 'it depends'.

I'm running a Speedstar K&N intake w/ V&H longshots & mid size baffles poked way up front in the pipes on my 06 Roadstar using the stock ECU.
Since having my bike dyno tuned by a pro I've found my bike:
1. Starts in one or two revolutions, even at temps down in the 20s.
2. Does not overheat, even riding at speeds around 80 mph in summer temps.
3. My pipes have zero discoloration.
4. Pulls like a Belgian Plowhorse but can fly like a Thoroughbred.
5. Sounds friggin awesome.
6. Gets a solid 42 MPG on any 87 octane El Cheapo Grande ethanol mix pump gas no matter how I ride it.
7. Has enough torque that I need to behave myself at stop lights when the light turns green to avoid the attention of any LEOs. Tires smoking tend to create attention. lol

For the roughly $150 I spent to have it tuned like that, I can't recommend dyno tuning enough.

Cheers!
 
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Last Edit: 2012/01/14 13:12 By BubbaKahuna.
 
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