Revolutionary? - Wrist Twisters
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post #1 of 10 Old 09-03-2020, 02:06 PM Thread Starter
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Revolutionary?

..but unlikely to be cheap...

https://advrider.com/bmw-announces-m-endurance-chain/

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post #2 of 10 Old 09-03-2020, 02:14 PM
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Quote:
Originally Posted by K1w1Boy View Post
Rest assured, it won't just have a BMW price, it'll have an M price!

Also, I'd expect to see the top makers come up with something similar.
BMW surely subcontracted it out, or is the exclusive marketer at least for a while, no doubt tied to OEM fitment of certain new BMWs.

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post #3 of 10 Old 09-03-2020, 04:39 PM
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“The ex-factory price for the chain on the S 1000 XR Tour is $160, though we don’t have any information at this point on whether it will be available on other models.” - MW Group Australia Nick Raman Product Communications Manager

Don't know if he's referring to US$ or AUS$.


https://motorbikewriter.com/bmw-intr...ry-free-chain/

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post #4 of 10 Old 09-03-2020, 06:42 PM Thread Starter
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Quote:
Originally Posted by robroten View Post
“The ex-factory price for the chain on the S 1000 XR Tour is $160, though we don’t have any information at this point on whether it will be available on other models.” - MW Group Australia Nick Raman Product Communications Manager

Don't know if he's referring to US$ or AUS$.


https://motorbikewriter.com/bmw-intr...ry-free-chain/
Not outrageous...

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post #5 of 10 Old 09-03-2020, 07:35 PM
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Quote:
Originally Posted by K1w1Boy View Post
Not outrageous...
Not so fast.............
As a price adder for a factory fitment on a new bike ordered that way?
Or as a parts price later on?

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post #6 of 10 Old 09-03-2020, 08:11 PM Thread Starter
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Quote:
Originally Posted by mcromo44 View Post
Not so fast.............
As a price adder for a factory fitment on a new bike ordered that way?
Or as a parts price later on?
Ah, true - good point!

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post #7 of 10 Old 09-10-2020, 01:41 AM Thread Starter
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post #8 of 10 Old 09-11-2020, 01:50 PM
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I wonder what kind of wear this will impart on the sprockets? Even if the chain can run without external lubrication, it would appear to me that the sprockets (especially aluminum ones) would suffer from the hardened/coated rollers.

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post #9 of 10 Old 09-11-2020, 03:48 PM
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If your meant to replace chain and sprockets as a set what is the point of a chain that will outlast the sprockets? Just curious.

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post #10 of 10 Old 09-11-2020, 05:49 PM
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1
Sprockets have to wear in order to continue matching the morphing chain pitch.

With new chain and sprockets, the centres of the rollers will align with the pitch circle of the sprocket.

As the components wear, chain wear more so normally assumed, the sprocket pitch and chain pitch no longer coincide along the original pitch circle plot line.
To compensate, the drive run of the chain finds a position higher up on the driving teeth of both sprockets so that the respective pitch circles coincide.

So, IF the chain doesn't wear, it won't be forced to walk out on the sprocket teeth to find a pitch circle match.
This will improve sprocket life, note the word "improve" is not quantified.

2
Chain rollers of a non wear material will result in the mating material sacrificing unless it too is a true non wear material.
The presence of a proper lube will assist the wear resistance of the lesser material, namely the sprockets.

3
I found some of the BMW statements to be very carefully crafted.
I did not see express wording that no external lubrication is required, just an implied message of benefit due to no egress of the sealed inner lube.

4
Surely better sprockets will be available to better match the materials of the chain roller coating.
Better in terms of accuracy and running surface treatments.
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