Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[RGlideKid]

I've got a stock SE air filter on my '15 RGU, and I've added the Vance & Hines Power Duals and the Monster Rounds, then had the bike dyno'd with a SEPST. 
I am considering changing out the stock paper a/c for a K&N filter.  I've had many different K&N's over the years and just think really highly of the product.

My questions are,
1) should I even bother (I know in the long run, the K&N will outlast many stock SE filters and therefore save me money, but is the K&N that much better than the stock filter, and
2) By adding the K&N, am I opening up a can of worms since the bike was dyno'd with the stock a/c in place?  In other words, is there a chance that by changing to the K&N my currently very smoothly running engine and awesome throttle response could change for the negative?

Any advice from you guys will be welcome!  Thanks in advance.

[GregKhougaz]

1.  The stock ventilator filter is very low restriction and washable though paper.  I recall someone (Steve George?) testing the difference between stock and a heavy breather intakes with a K&N finding negligible performance diffence and then only at peak power.  So, no,  the K&N is not that better.  If you need to replace the filter, then go to the K&N.  I ran  a heavy breather on my '09 110 with the K&N (for the look) and like the products but have left my '15 Ventilator stock. 

2.  The answer is above.  Since there is negligible difference, there should be negligible affect to your tune.  Perhaps Steve will chime in. 

[RGlideKid]

1.  The stock ventilator filter is very low restriction and washable though paper.  I recall someone (Steve George?) testing the difference between stock and a heavy breather intakes with a K&N finding negligible performance diffence and then only at peak power.  So, no,  the K&N is not that better.  If you need to replace the filter, then go to the K&N.  I ran  a heavy breather on my '09 110 with the K&N (for the look) and like the products but have left my '15 Ventilator stock. 

2.  The answer is above.  Since there is negligible difference, there should be negligible affect to your tune.  Perhaps Steve will chime in.

Interesting findings.  Thanks Greg.  Like you said, mayb we'll get some more thoughts on the subject.  It's sounding like it's more of a future 'filter cost savings' than anything by switching over...

[Streetglide1]

I just went to a K&N filter the other day, My performance is better, but with that said the stock filter was getting awlful looking and had been cleaned twice.

[grc]

The difference will be negligible and the nice thing about late model bikes is the closed loop engine management will compensate for negligible changes easily and automatically.  It does that even as filters get dirty and then when you clean them.

IMHO, the stock filter is fine and it's not worth replacing a relatively new stock element with a K&N.  Once the stock filter has been cleaned a few times and is starting to look ratty, rather than replace it with another then I would consider the K&N.  K&N filters, if maintained properly, will probably outlast the motorcycle.

Jerry

[RGlideKid]

The difference will be negligible and the nice thing about late model bikes is the closed loop engine management will compensate for negligible changes easily and automatically.  It does that even as filters get dirty and then when you clean them.

IMHO, the stock filter is fine and it's not worth replacing a relatively new stock element with a K&N.  Once the stock filter has been cleaned a few times and is starting to look ratty, rather than replace it with another then I would consider the K&N.  K&N filters, if maintained properly, will probably outlast the motorcycle.

Jerry

Thanks, Jerry.  That's a good plan!