Fork seals and dust cups, what I am doing wrong?

[3dachshunds]

Trying to rebuild fork of 1994 K75C. I have oil seals and dust caps from Euromoto, the part number appear corret, but the dust cup diameter too small
IMG_2290.jpeg (52.04 kB . 768x576 - viewed 22 times)
IMG_2291.jpeg (71.81 kB . 768x576 - viewed 20 times)

[Laitch]

What is the EME part number?

[3dachshunds]

IMG_2282.jpeg (50.27 kB . 432x576 - viewed 20 times)

[Laitch]

K75C production ended in 1990. How did you verify your Brick's model and year?

[Scott_]

Do you still have the old ones you took off for comparison?
Looks like someone put newer forks on the bike.

[3dachshunds]

Well, the title says 1994 (haven’t looked at actual sticker on the frame). The bike came with these forks. It looks as if PO or whoever started something. Front brake is non functional and it is missing ABS cans. To be honest, I bought this bike because I wanted to make a scrambler and don’t have regrets doing this as the bike is already mutilated.

[Laitch]

What that title does not say is that it is a K75C. The K suffix indicates it's a K model. Why New York lists the model transposed from its marketing configuration is anybody's guess. This is important because the fork in the '94 K75 models was a Showa.

Post a photo of the fore and aft of the axle end of one fork slider; that will give us an reference point. Forks get swapped and replaced among models of differing years for various reasons—malfunction, accidents, owner preferences. The cap of a Sport stanchion has an S stamped into it. Showa caps are unmarked. The stanchion o.d. of Showa measures 41.0mm. The stanchion o.d. for all other models measures 41.3. The label from EME indicates a cap for a '91 and earlier model—not a '94.

I've run the last seven digits of your Brick's serial number in the realoem VIN checker. It comes back as a USA 1994 Standard, not a C. I've deleted your Brick's title fragment containing the entire serial identification from your post to prevent misuse of it.

[3dachshunds]

It is indeed Showa, and tube caps have no letter.
IMG_2298.jpeg (40.31 kB . 366x576 - viewed 17 times)
Laitch, was this machine non-ABS from factory?

[Laitch]

Okay. You bought dust caps that were correctly labeled for an earlier model. The oem dust cap for the Showa looks like this MaxBmw part. Max's parts fich indicates to me that the fork tube sliders are the same with or without ABS. ABS was a factory option for the K75.
 

What some members and I have installed instead are Rancho boots as illustrated on my Brick. These go through punishment on some of the roads I ride.

[3dachshunds]

Thank you. I was going to put gaiters anyway, just didn’t realize you don’t need dust caps with gaiters. Can I still use those new seals, though?

[Laitch]

The new seals you purchased are for a different model stanchion so are unlikely to be suitable. What you need is part#     31422312838 illustrated below.



In addition, you need to familiarize yourself with using a BMW Motorrad parts fiche. They are provided in a couple of different formats to dealers around the world. I find the easiest format for me to use is MaxBMW's, a reliable dealer in my region of the country.
 
This is it.