Air Filter 701

BISavage

BISavage

champion rider
Joined
Oct 8, 2020
Messages
2,497
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Unspoken Origins
So, I was looking into 701 spare parts and see that the paper air filter is incredibly easy to find and much more affordable than any air filter I ever bought...

...have to go like 200000 km before a k&n paid off...

Good to know its a cheap replacement, especially since the air box lid is so frequently forgotten by inexperienced mechanics. 🙈
 
When Cross Referencing the Car Air Filter which should fit the 701, I found some alternatives
(None of which I have tried personally, so...)

For instance, this dry foam type:
Pipercross: PP1777
 
I have been thinkin through the airbox lid removal in combo with a fuel dongle...
The pirate video shows that the lambda value at low throttle / low revs - without the lid is "richer" than with the lid...
 
Just compared two different Car Filters vs. the Stock filter.

The price of the car filters is about 20%
% of original, and because it comes with 2x in the box that calculates to about 10%...

I noticed that the pleat count is less than the original and when held up to a light the orginal lets less light through.

Not sure what that means as far as performance or filtering is concerned.

Here is the proof:
20211228_114327.jpg
20211228_114343.jpg
 
If the stock filter is good enough for the 1090 Adventure, it’s certainly good enough for a 700cc imho

And I doubt if you would measure any gains/differences with any filter as long as you don’t change the airbox.
 
I guess where I was going is that the car version is for small low rpm passenger cars, has like 50 pleats vs the KTM's 60 pleats, and the KTM's appears to have a thinner paper material and which lets less light through.

I found this interesting as the name on the KTM filter and the one on the car filter on left is the same...
 
So, some more airfilter action, here are 2 options which are designed for the bike next to the stock one:
20211230_095332.jpg

And here is the Car Version next to the Bike Version:
20211230_095836.jpg
20211230_095853.jpg

And here the "light test" with reduced exposure to see the difference in filter material:
20211230_100045.jpg

In conclusion the car filter is basically a sport filter the bike, in paper format;
1. Less restrictive / Less filtering (light test)
2. Cost Savings per Filter (shopping test)
 
has anybody thought about a mod of the filter cage like this?

pirate racing mentioned that they will prove a mod, but never againe heard a word about it.. iam curious if this has no impact or they just wanna sell their bmc cone filter?!?

vitpilen airbox mount.jpg
 
Well, when you install a modification to emissions relevant parts, you instantly made problems for yourself.

I am surprised that mine came with a battery cover...
 
bartiger said:
has anybody thought about a mod of the filter cage like this?

pirate racing mentioned that they will prove a mod, but never againe heard a word about it.. iam curious if this has no impact or they just wanna sell their bmc cone filter?!?

View attachment 2729
Click to expand...
.. and when the designers come up with "interesting" shapes like this, I would guess that its already "optimized"... otherwise why...
 
Sorry guys I thought about an additional option to optimize airflow when riding without lid.. but it's not the right thread. Mea culpa
 
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