Air box removal, F%&$"?

[foliver]

Hi again, i would like to change the external fuel pipes, and replace the cranckcase breather hose.
All this stuff is easier without the Top airbox part, but the big air tube coming from the front is "welded to the plastic", if i apply force, i'll breack it, for sure.....any tip on removal?
i guess it's impossible the change the fuel regulator hose without removing the airbox right?

This part of the design, doesn't brings an easy going manipulation....

Any tip?

[rbm]

You don't have to remove the air box to do those maintenance items.  The clamps around the crank case breather hose are accessible from the left side of the engine. As for the fuel pipe, to get at the pipes behind the throttle bodies, you'll have to remove the air filter box and the 90° pipe that joins the MAF to the air accumulator.  Simply remove the air filter, undo the clamp holding the 90° pipe and remove the top portion of the air filter box. Then remove the two screws holding the lower part of the box to the engine.  To get at the clamp for the MAF, it should be accessible from the top of the bike after you remove the tank.

[foliver]

Hi RBM, thanks for your answer.
I've the tank removed, the 90 degrees pipe, doesn't want to be free.
I need to apply force and i'm affraid to breack it....anyway, i can buy a replacement and continue with the fuel hoses as you describe...
txs!

[Laitch]

You haven't indicated that you have loosened the clamp on that elbow, fabian. If you have loosened it, heat the joint slightly with a hair dryer, spray some lubricant on the joint, tap the elbow with a mallet, make an espresso and enjoy it then wiggle the whole assembly until it detaches, along with the top if necessary.

[foliver]

Jajaja, hi Laitch, I’ll follow your suggestions, even the expresso one.
I keep posting txs

[daveson]

The 90 degree pipe, one end doesn't want to break free, loosen the other end, it will come free easily.

[foliver]

Hi Daveson, it was a lot easier!
Thanks!

[foliver]

Oh-my-god

[foliver]

I offered this kit to my wife a year ago.
I never thought I was so useful.
I’m doing archeologhie!!!

[foliver]

Perfect!

[daveson]

I spin the hose clamp around, then you don't have to remove the fuel tank to remove the air box.

[foliver]

Daveson, no problem, my bike is dismantled cause I painted it (well I send it to be painted) so no problem!

[The Mighty Gryphon]

Plant some tomatoes for a snack on long rides.

[foliver]

Jajajajajajaj

[frankenduck]

Usually when you get the top of the airbox off you can just pull on it and it will disconnect the big 90 hose from the plenum above the throttle bodies.

When you put the air filter back in if you put some Armor All in the groves around the perimeter on the top and bottom of it then it will slide in more easily.

Proper air filter installation:




You've already got the air filter off but for future reference the easiest way to get the air filter out is to apply some leverage to lift up
the rear of it.

[frankenduck]

A shop vac (or even a regular vacuum with a hose) is a good way to clean the dirt off the top of the engine.  Easier than using a dollhouse shovel.

[foliver]

jajajja, it was fun.
i used the little shovel with patiente and i fill half oil filter case with dirt. A lot
Then i use a vacuum, and paper towels, and little brush to arrive to something "close "to ok, along with a degreaser.

Tomorrow new fuel lines, and vacuum one, along with a stronger degreaser , withgout touching any rubber.
The Pressure regulator has a bit of old ( 6 years) fuel, wtf, how it smells, ugly!

[The Mighty Gryphon]

Ah, no tomatoes for you.  Your engine is beginning to look pretty good.

[frankenduck]

While you're in there I recommend hitting the rad hose with some 303 protectant to help it last longer.

[foliver]

Txs Franckenduck, good idea, will do!

[foliver]

Looking for a solution to make a 90 degrees in a fuel line ( the one that goes from the regulator to the fuel tank), I read the spring tip.
If you insert a spring inside the line, yo can even go far more than 90 degrees maintaining the diameter.
I went to “la casa del resorte” ( house of spring).
They didn’t have the exact one to fit into the 13x8 fuel line, and the guy propose to me to build one in stainless steel. He build an exact one in 30 min.
I like this things.

[Laitch]

Looking for a solution to make a 90 degrees in a fuel line ( the one that goes from the regulator to the fuel tank), I read the spring tip.

Usually the spring is placed on the outside so flow rate and pressure aren't affected like these. I'd be wary of your method.

[foliver]

Hi Laitch, i'm with you on that, nice solution if you have a little space arround, but i was thinking that the diameter of the spring ( the interior) is the same that the ouptut plug on pressure regulator, so, my thinking was, is as the pressure regulator was 5 cm longer...so i accepted this method...
I've seen a vid that use this method for injectors, so i thought that for return, is less problematic...
: https://www.youtube.com/watch?v=Z5UlPNvu_qM


But you are right anyway.

As my line is not original, so not bended, i find this solution a compromise.

Thanks for your opinion!

Now, i'm fighting with the big water hose, the one that passes into the engine......

[alabrew]

I'm sure I will be corrected with many horror stories, but in 30+ yrs ridin', wrenchin', readin' about these bikes, and having owned a "few", I am having difficulty recalling ANY coolant hose failures. Purdy sure those on the '85 Big Red are original.

[frankenduck]

I'm sure I will be corrected with many horror stories, but in 30+ yrs ridin', wrenchin', readin' about these bikes, and having owned a "few", I am having difficulty recalling ANY coolant hose failures. Purdy sure those on the '85 Big Red are original.

I have one. I did a 50K complete service on my 94 K1100RS at my dad's place in SoCal. Instead of using the drain plug to drain the coolant I disconnected the big hose that goes into the water pump. A few hundred miles later after filling up in Carmel on my way home up the coast I noticed a big puddle of coolant under the bike. There was a hole in the coolant hose down near where it enters the water pump. Being a BMW part, it had conveniently decided to fail on a Monday - when the dealers are closed. It's a long sordid tale involving a ghetto repair in a vacant Santa Cruz parking lot but I did manage to "limp" the bike to  a friend's place in Sacramento without overheating the motor. He lived near A&S who luckily had the hose in stock when they opened on Tuesday morning. Ever since then I always carry a roll of Rescue Tape when I ride.  And I also drain from the bottom of water pump, not the hose.

But that one instance is the only coolant hose failure I've ever had owning many K bikes over hundreds of thousands of miles so I agree with your assessment that K coolant hoses are, for the most part, highly resistant to failure.