Stage 1
Road Warrior
Joined: Jun 2014
Posts: 1,297
Likes: 57
From: N. IL
If your filter is due for replacement, why not go with a k&n. Is it going to breathe that much more to warrant a tune, no.
If you have to have a certain intake cause it looks good, that's different.
I'd put a k&n in, then when the money was right, get a tuner.
Ride on.
If you have to have a certain intake cause it looks good, that's different.
I'd put a k&n in, then when the money was right, get a tuner.
Ride on.
Seasoned HDF Member
Joined: Aug 2013
Posts: 6,080
Likes: 1,957
From: Somewhere on the Bourbon trail
Originally Posted by shekmark
DK Customs shows a Dyno chart comparing a stock late model filter to a aftermarket model. The difference was substantial.
Tourer
Joined: Jul 2015
Posts: 462
Likes: 37
From: Mississippi
Just changing the filter and slip ons is not a stage one, I see no need in spending money on remapping for that but I would go with the K&N filter it definitely breathes better than a stock air filter. Imo
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,471
Likes: 2,998
From: Charleston, SC
I've run the K&N (for 2014 with stock air box) with slipons for over 10K without any issues. I then put a PV on the bike to see what it was doing. Not much.
Later played around with the "Improved Stock tune" and it actually ran a little better. Since then I'm back to stock pipes and the K&N with the stock tune. All fine.
Later played around with the "Improved Stock tune" and it actually ran a little better. Since then I'm back to stock pipes and the K&N with the stock tune. All fine.
Road Warrior
Joined: Nov 2014
Posts: 1,962
Likes: 140
From: NY
Thats because crankcase is venting blowby gases full of hot oil mist thru air filter,go to DKCustom's external vent system and that wiil not be a problem anymore.
My bikes air filter used to get oily & dirty enough after only 3,500-4k miles to require cleaning.
But after i installed DK's external breather kit for crankcase the air filter doesnt look as dirty at 6,500-7k miles as it used to 3,500-4k miles.
Scott
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Ultimate HDF Member
Joined: Nov 2005
Posts: 5,926
Likes: 138
From: NE Ohio
Keep in mind when you compare dyno charts, those numbers can be manipulated to show a better light on a product. They are also numbers gained at Wide Open Throttle. How many folks realistically spool their engines up to 5,800 - 6,200 rpm on a regular basis? Not many, so in the range most ride, the gain is nothing. You will gain more from a good exhaust and a tune, than you will with an air cleaner. The only reason to change an air cleaner on a Rushmore bike, or trike, is because you want to change the looks or you're doing ported heads, a bump in compression and cams to match that combination.
Now venting the heads to atmosphere vs into the intake, that's a whole different kettle of fish. External venting may give you a smidgen more power or torque, not sure if anyone reputable has measured it or not. The biggest gain is you do not suck all that **** into your engine and build carbon.
Last edited by msocko3; Apr 7, 2016 at 11:01 AM.
If you ever plan on getting rid of your Catalytic Converter then I would get a Power Vision tuner.
If you keep your Bike the way it is, Full Bore and a K&N filter, go with FL-ViED-10 from NightRider
If you keep your Bike the way it is, Full Bore and a K&N filter, go with FL-ViED-10 from NightRider