Cool!
Do you have any more details about what all of those are? Like, are they moly types, oil types, wax types, etc.?
Again: FWIW.
Test was carried out many years ago. They were all the kind that gets on fluid, so it can penetrate and stiffen later. Products were tested for lubing performance, durability and fling off. I don't remember any information about substances. I'm satisfied with this Shell product, but the old way: chain in a warm Castrol Kettenfett bath was best. Chain became real hot this way and not the kind of luke warm after riding. Alas, this product is not in the shops anymore. Very best IMO is a closed chain housing. Dutchman Henk Besselink claims to have covered 230.000 kms+ on his CB 750 with the same chain in a Tyrra casing, with only one adjustment so far. Another made in Germany was the "Becker Fettkasten". In such an oilbath chains lived forever. I don't know why they've disappeared. Maybe they leaked. If they were still around, I definitely would buy one. I believe MZ motorcycles still have enclosed drivechains. Sensible bikes, MZ's.
There were 3 distinctly different enclosed chain cases for the 750 that I remember. One was from Bates, I think, and the other two from companies that seemed to only offer that item, then disappeared. One of those was a diecast aluminum unit that bolted where the chainguard used to on K2 and later swingarms, and reached all the way around to the front sprocket. It had a rubber bellows top & bottom where it crossed the swingarm. Very difficult to install properly, ran 90w oil inside. There were several seals on it: one behind the countersprocket and one behind the rear sprocket (which didn't actually work back there, but relied on the centrifugal force to fling the oil outward to the case for recovery). I only know of one of these that got installed, but at last contact it had gone over 20,000 miles without a single adjustment, nor need for it. It was pretty heavy, at about 12 pound.
The other one (not Bates) was a 2-piece upper-lower shell of sheet metal that had a lower portion that reached up under the countersprocket to catch the drips: worked fairly well, except fot the 90w oil drool that would slowly collect on the sidestand (much like with conventional chain lube). It kept the dust off the chain and [most of] the oil inside, and greatly improved chain life over exposed chains. It was easily bent, though, and only fit the K2-K6 bikes because of the forward chain guard's bolt hole (which is missing on K0-K1 arms).
The third one was just a fiberglass clamshell that fit over the chain like a dust cover. It would enclosed the chain lube spray, which had to be applied through a little removeable rubber plug: it was almost impossible to see inside to determine if the chain needed adjustment. Many of these, therefore, got destroyed when the loose chains started whacking away on the lower case half on accel, and would tear out chunks on the top half, right near the swingarm pivot, during hard decel. I remember riding to Black Hills [across South Dakota] and seeing one of these lying on the side of the road in pieces, and then several more unmistakable pieces of other ones along I-90 after that, during the week after Sturgis, 1972. I think this was the one Bates was selling. (I also noted at least two Bates windshields lying on the side of the same road, from their ill-fated handlebar fairings!)
