*+%#@%$ air filter assembly

[Motor31]

I did a small job again today and learned once again how much of a pain in the butt it is to do something as simple as changing an airfilter on a K75RT. :banghead I would really LOVE to meet the teutonic twit who designed the airfilter assembly. I wanna meet him in a dark alley with a 2x4. :mad :deal

The one good thing is that I saw the crankcase vent line was oily and leaking. Of course like usual I started a project on a freaking holiday weekend and the shop is closed. At least there IS a BMW shop in the Spokane area. I sure hope they have the hose. :bluduh

I need a beer or 12. :1drink

[riderR1150GSAdv]

You know how those teutonic twits designed the K-bikes right??
They took a string from which they suspended the airfilter, then proceeded to built the bike around it. :stick :bluduh ..... :D

[Kayseventyfive]

Mine just sort of slides and wiggles out to the right while I hold the top cover up. My biggest fuss is reinstalling the left rear lid clip. I ended up with a really long, long nose pliers.

[jdiaz]

Did you take the right kneepad (between the fairing and gas tank) off to do the job? It should not be that hard compared to other K75's.

[Motor31]

Did you take the right kneepad (between the fairing and gas tank) off to do the job? It should not be that hard compared to other K75's.


I took off the entire right side of the fairing off. You have to to get access to it. I have an RT. The hassle was that it was very hard to raise the top part of the filter box to get the old one out. Of course they tend to stick together. Getting the new filter in was also hampered by the mass of wires, foam rubber that was placed directly above the box. It seems they could have accomplished the same thing by paring about an inch off of the box height dimensions.

I love the RT fairing coverage on my K but I sure do hate having to remove all the "stuff" to do maintenance on other parts of the bike. It really makes me wonder about the oilhead RT's I've been looking at lately. That "pregnant" looking fairing gas tank assempbly seems to be a bit much. I'd love to see how it comes off and what you have to remove to do standard maintenance of the bike. Since I travel full time and there is a scarcity of shops I need to be pretty much self sufficient. Besides, I don't have the money to be spending $70 to $90 an hour for shop labor. Hearing the shop tell me that the 20k service that was soon due on a newer used K was $800.00 was enough for me to finalize my decision to pass it by.

[41077]

I put a K & N filter kit on both my bikes long ago (over 150,000 miles) for the very reason that it is soooo much easier maintain. One screw, pop it off, clean, oil, replace.
I've heard a lot of negative comments about K & N filters but I have not experienced any problems after making the switch. It also opens up the area above the engine and helps move the hot air out. The kit consists of one flat metal base, one bracket, one filter. Hot pepper optional.

[Kayseventyfive]

Looks really nice. What is the flat metal base for?

I had negative results in the desert with K&N, but I also remember when street bikes came without filters. I wonder if a fine foam overwrap would help the K&N. It looks more like a motorcycle with the K&N.

[jdiaz]

Looks really nice. What is the flat metal base for?

The flat metal base is needed to support the airflow meter.

[breyfogle]

The flat metal base is needed to support the airflow meter.


Looks to me as if the airflow meter assembly support bracket bolts direcctly to what was the right front airbox bolt. The flat plate looks to be only cosmetic.

I'd be interested in what effect the mod had on the powerband, either good or bad.

[jdiaz]

Looks to me as if the airflow meter assembly support bracket bolts direcctly to what was the right front airbox bolt. The flat plate looks to be only cosmetic.
Looks like there might be a second bolt back by the fuel pressure regulator, to secure the plate a little better and maybe give the bracket a little stronger platform to sit on.

But if that plate were out of there, you sure could keep food nice and warm directly on the engine block!!

I'd be interested in what effect the mod had on the powerband, either good or bad.
I want to know what happens in a hard rain.

[CustomSarge]

That is an idea I Gotta Steal! I'd just want to add a cowling from in front of the radiator side coverpoint to rainproof (hat tip > jdiaz) and decorate/conceal the entire assembly. 41077...Salute!

I wonder how that affects fuel/air ratio... My R11HR has K&Ns at the venturis of each injector intake. An exhaust gas analyzer showed 18-21(!):1 where 14.7:1 is optimal & mid-high 13s is what performance tuners go for. It took Extreme Measures to put mine back into the mid-low 14:1 area. The tradeoff was both ridiculous fuel consumption AND performance.

I should add that the HR has resonator only exhaust: no baffles/flow impediments. I built it to breathe, it just took a while to accomodate the resultant mixture shift.

When first built, snap the wick in 1st @ ~3k: lift frontend 2-3" & carry it ~100'. Now: lift 8-10" & carry it until revlimiter hits (I haven't figured out how to shift it fast enough yet). I had NO IDEA you could make one of these runtrains so fast! :dance

I'd appreciate feedback on exhaust gas readouts, as to ratio range. I'm not too sure you'll get much change in keeping stock exhaust. It Begs for aftermarket to grant both in & out considerations... :thumb

A performance forum?? (didn't mean to hijack the thread...) <<<)))

[andy45320]

Sounds as about as much fun as replacing the airfilter on the RS/GT/LT K's....remove both right and left fairing, front cowling, unbolt fuel tank, disconnect quick connect fuel lines and pray they don't decide to spring a leak, THEN from the bowels of the bike, remove the filter cover, pull the old filter, hoping the pound of insects on it an entomologist would die for don't fall down the throat before you can vaccum out. The entire hour it usually takes me to replace it, I usually think about the 1/4 gallon of extra fuel the tank would hold if they moved the freakin thing to the front of the book...sigh

[SIBUD]

I took off the entire right side of the fairing off. You have to to get access to it. I have an RT. The hassle was that it was very hard to raise the top part of the filter box to get the old one out. Of course they tend to stick together. Getting the new filter in was also hampered by the mass of wires, foam rubber that was placed directly above the box. It seems they could have accomplished the same thing by paring about an inch off of the box height dimensions.

I love the RT fairing coverage on my K but I sure do hate having to remove all the "stuff" to do maintenance on other parts of the bike. It really makes me wonder about the oilhead RT's I've been looking at lately. That "pregnant" looking fairing gas tank assempbly seems to be a bit much. I'd love to see how it comes off and what you have to remove to do standard maintenance of the bike. Since I travel full time and there is a scarcity of shops I need to be pretty much self sufficient. Besides, I don't have the money to be spending $70 to $90 an hour for shop labor. Hearing the shop tell me that the 20k service that was soon due on a newer used K was $800.00 was enough for me to finalize my decision to pass it by.

Well here are a couple of pics showing how hard it is to get to the airfilter on the RT.

Step one. Insert key in back, turn, seat comes completely off.

<img src="http://downloads.c-2.com/photos/1158153963.jpg">

Air filter is under round cover right behind gas tank.

Remove 2 clips on the rear of the cover and you see:

<img src="http://downloads.c-2.com/photos/1158154132.jpg">

Total time? 15 seconds. :clap :dance :dance :clap :buds

How is that for easy???????

[Motor31]

Silk 100........ I hate you! :fart http://smilies.vidahost.com/otn/violent/bigun2.gif :D

I did see that when I was looking at oilhead RT's. It's one of the reasons I was / am seriously considering them for a replacement for the K75. I just have to find an 04 that I can afford. It may take a couple years or decades though...... :violin

[Kayseventyfive]

I suspect a lot of filter element replacements are premature. I connect a Filter Minder and do a full throttle run through the gears every so often to check.

[SIBUD]

Silk 100........ I hate you! :fart http://smilies.vidahost.com/otn/violent/bigun2.gif :D

I did see that when I was looking at oilhead RT's. It's one of the reasons I was / am seriously considering them for a replacement for the K75. I just have to find an 04 that I can afford. It may take a couple years or decades though...... :violin


LOL

SILK1100 stands for Southern Illinois 1100 for my first BMW Lucy a 93 K1100LT which is now at home in Indiana.

I'm sure there are many more things on the RT which will much more difficult than the air cleaner!

Sure am learning to love the RT. :clap :clap

Do miss the neck snapping acceleration of the K bike.

[41077]

Question,
I want to know what happens in a hard rain.
__________________
Jon Diaz
I pull over and wait, seriously we were surfing with the semi's one time and the wheel wash soaked us, but had no effect on the bikes performance.

Question,
Originally Posted by breyfogle
I'd be interested in what effect the mod had on the powerband, either good or bad.
No measurable affect that I could tell from the seat. I had one K with and one without untill I had a chance to get a second filter unit from a wreck now both K's are twins again. Wait that can't be right, can you call a 3 cylinder a twin?

But if that plate were out of there, you sure could keep food nice and warm directly on the engine block!!
Had that thought, just not practical.

One of these days I'll take the time to figure the Quote thing out.