Folks,

A neighborhood K75 riding buddy and I have taken a close look at our very mis-matched, E-Bay-sourced sets of cases and, in his case, an E-Bay seat. My buddy, with one K57, needed three keys for the bike, while I, with my two K bikes, discovered I also had some missing wafer tumblers and also some flat-out mis-matched tumbler assemblies.

If any member out there has an unneeded collection of the lock wafer tumblers (to include the end split-bottom retaining wafer tumblers), or just plain excess old lock cylinders with their wafer tumblers inside, pls PM me. Appreciations in advance!

Most Bay Em Vay dealers, of some time in the moto biz, have a stockpile of these bits in their parts or service departments. Be sure to enquire after the single sided version. It's been fifteen years or so since these were common so they might be willing to let you have the whole lot. We keep a smattering of them round for Airhead, early K and early F series emergency lock cylinder building or repairing.

51 25 2 303 680 is the lock cylinder with 'tumblers' and with key if you can locate these for cheap. The 'tumblers' don't have their own part numbers, alas.

Quite a number of years ago I got a complete set of pannier locks (6) from the UK. Prices have now gone up with Motobins 47.50 UK pounds, Motoworks 44.50 UK pounds. At the time the cost worked out to around $ 60-80 Aus. The locks are all keyed the same and my OEM ignition key fitted them. I have found that my ignition key is capable of opening quite a few sets of panniers, including a Type 2 set bought as part of a package deal missing a key.
Regards Martin.

@Two Wheels Better wrote:Most Bay Em Vay dealers, of some time in the moto biz, have a stockpile of these bits in their parts or service departments. Be sure to enquire after the single sided version. It's been fifteen years or so since these were common so they might be willing to let you have the whole lot. We keep a smattering of them round for Airhead, early K and early F series emergency lock cylinder building or repairing.

51 25 2 303 680 is the lock cylinder with 'tumblers' and with key if you can locate these for cheap. The 'tumblers' don't have their own part numbers, alas.

Yes, and it's a bit of a shame because there are only four brass wafer "tumbler" variants overall - the end locking wafer with the slotted bottom, and three wafer "tumblers" of varying heights of their transverse bottom piece which work with the key cut dips. Maybe if BMW had specified they be stamped with a 1, a 2 and/or a 3 depending on their transverse key height, there would continue to be an parts orders market for them now.

In my experience, fewer and fewer dealers maintain that particular excess parts bin, unlike the excess parts bin for the newer 2-sided keys. The closest one, Bob's BMW, used to even 18 months ago but I just cleaned their excess bin out of the very last old single-side key cylinder.

I found that it is the final locking wafer that seems to go missing along with it's spring. I wondered whether it would be possible to manufacture the wafers using a CNC machine. I did once try to get some replacement springs but couldn't find a source.
Regards Martin.

This has made me spend some time ruminating on luggage locks this afternoon.

It seems to me that the plastic luggage found on classic K bikes isn't all that hard for the determined thief to enter, hence, in my view the only purpose of the lock is to prevent the latch from opening due to vibration, and the tumblers/wafers in the cylinder to prevent the lock from unlocking on it's own.

To that end, it seems to me that any more than one tumbler is overkill and only leads to frustration when one has several bikes and numerous keys and pieces of luggage.

I have decided to make a winter project of removing unnecessary tumblers and attempting to make all my latches work with all my ignition keys. At worst, I may be able to come up with a master key that will work with all ten pieces of luggage now in my possession. It might also make it possible to eliminate a few of the 17-18 keys I now have hanging around.

If anyone is interested, I have complete new sets of 6 lock cylinders and 2 keys for $50. plus shipping CONUS.

51252303683[url=https://shop.maxbmw.com/fiche/PartsSearch.aspx?&searchtype=undefined&parts=51 25 2 303 683#P51252303683] [/url]	SET: SET OF LOCKS	0.33	$96.00

This is a bag of six locks. Enough to do both bags.