I am new to this forum but have been LURKING for the past few months. I just bought my first LT from a friend here in Colorado. The Good; I know the history of the bike since the PO was the original owner, I have a complete history of the maintenance. It's in excellent condition IMHO and will deliver many enjoyable miles of 2-up touring. And the price was right. The Bad; I have an oil leak at the clutch housing. There is no clutch slipping/slippage that I could tell of. The PO said the oil just started before he parked it early last season. So I'm hoping to just replace seals and move on.
With that said; I am taking the big girl apart, doing the throttle cable mod, replacing the rear main seal and trans seals, new slave cylinder, and brake lines (complete).
Question; I spoke with a BMW Service Manager last week at a BMW Club Meeting, told him about my purchase. He claims the clutch parts are different now and if you replace the clutch friction plate then you also have to replace the fly-wheel, spring plate and cover! He claims the thicknesses have changed and if you don't do everything then the clutch won't dis-engage?
I have this parts list from another post. I want to verify the parts AND if I replace the wear-able part (friction plate), will I run into a parts / tolerance difference since the bike was first put together in year 2000.
The store-house of knowledge on this site is incredible, I had a K75S some years ago and know the BMW community support first hand. Thanks in advance. ML
Welcome to the forum Mark. The LT came out after the early clutch part change so there is only one listing and that is correct for the cover and pressure plate. It was the early 97 K1200RS that had different parts so if you go by the fiche on MAX BMW for the LT, your parts will be compatible with just a friction disk.
That being said, you still may have wear that would require replacement of those parts anyways depending on use and mileage.
As the clutch on these beasts wears, they wear in a dish pattern deeper on the inside than outside. If the dishing is severe enough, the contact area for your new clutch friction disk will be diminished and it could slip, cause excess heat and warpage. Take a few minutes and check the dishing on both plates to see how badly they are worn. If you can't do that, put a micrometer on the old friction disk at several places around it both inside and outside edges to see how badly the wear difference is.
I see some differences in your parts list versus what is on the MAX site. Go there and check the current part number for the 99-04 LT and update your list. The clutch plate 21 21 7 670 456 on line 7 is not what MAX has listed. Could be a typo or referencing the old k-RS part no longer available.
21 21 7 670 455 CLUTCH PLATE - D=180MM 0.68 1 $204.79
MAX BMW Motorcycles - BMW Parts & Technical Diagrams - K1200LT 99-04 (89V3)
As long as you are in there, I would get a Viton 19x4 O-ring instead of the stock BMW part on line 1 of your sheet. Beech has them and so do I. I can send you one free if you PM me with an address.
Be very careful with the trans output shaft as there is an oil hole just inside the seal lip and a few thousandths too deep and it will leak. Ask me how I know this. The special driver sets the seal only 50 thousandths deep. Very unforgiving.
There are many here who will watch and help you through if you have any issues. Just did it myself.