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Aug 24th, 2023
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Joined: Oct 2012
Posts: 2,776 Likes: 59
Talk Morgan Expert
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Talk Morgan Expert
Joined: Oct 2012
Posts: 2,776 Likes: 59 |
True - actually if the sprocket can be made to last properly isn't that good enough? My new sprocket is behaving very well at the moment so wear does seem to be the bugbear. Speaking as someone who is probably soon to be stung for the cost of a new back sprocket I would agree! I'm very interested in the idea of replacing the teeth of a worn out sprocket with polyurethane teeth, certainly sounds like it could simply work and worth the effort of getting an old sprocket across the pond and back. The current rear sprocket does not come cheap.
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Joined: Jul 2011
Posts: 836
Talk Morgan Regular
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Talk Morgan Regular
Joined: Jul 2011
Posts: 836 |
I knew the Liberty had gone that route, but I didnt realize how much it had limited the occupant space. I had always wanted to ask which is why I am glad this topic came up. Thanks Have a look at the Liberty Ace that preceded the M3W; it's passenger seat is only about wide enough for a malnourished child as the prop shaft angles over away from the driver so as to allow the final drive to clear the drive wheel. Using a short prop shaft then a bevel box plus chain or belt means that the prop shaft can be kept central through the (still narrow) cabin then the clearance for the wheel is provided by the well proven expedient of the bevel box. There is a slight problem with this statement of course!
As for chain or belt, a chain is tremendously light, narrow and efficient so is great where that really matters, say in a sports bike. The additional weight and width of the sprockets in a belt system is well suited to big, heavy, slow cornering cruiser type bikes where the additional unsprung weight isn't really an issue. Given some more development time and experience perhaps some more clearance between the belt and the tyre could have been built in along with easier wheel changing, easier alignment adjustment, better materials and so on.
Just my opinion...
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Joined: Feb 2012
Posts: 112
L - Learner Plates On
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L - Learner Plates On
Joined: Feb 2012
Posts: 112 |
I wonder why the belt pulleys arnt hard anodised?this would porolong the life by about 1000%.
What do you experts think?
David
,,BSA Goldstar,Honda CB1100R. Jaguar FTypeS Porsche Cayman S
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Joined: Apr 2013
Posts: 1,363 Likes: 11
Has a lot to Say!
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Has a lot to Say!
Joined: Apr 2013
Posts: 1,363 Likes: 11 |
I wonder why the belt pulleys arnt hard anodised?this would porolong the life by about 1000%.
What do you experts think?
David No expert but I've nothing to lose... They ARE anodized. Anodizing is not a deep process. At best it is a very thin coating. Added one molecule at a time. On top of soft aluminum. It would surprise me if it is 5 thousandths of an inch thick.
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
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Joined: Feb 2012
Posts: 112
L - Learner Plates On
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L - Learner Plates On
Joined: Feb 2012
Posts: 112 |
There is a vast difference between conventional and hard anodising.Conventional anodising is done purely for corrosion reistance.Hard anodising is basically as hard as hardened steel and is used for wear resistance a good example is the use on motorcycle clutch baskets, I have used it on many applications from caliper pistons to aluminium rear chain sprockets on race bikes.
The thickness of ordinary anodising is 5/10 microns,hard anodising at least 50 micron thick and very hard.A totally different process to normal anodising.
I hope this is of intrest.
Regards David
Last edited by David G; 05/12/14 09:16 PM.
,,BSA Goldstar,Honda CB1100R. Jaguar FTypeS Porsche Cayman S
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Joined: Apr 2013
Posts: 1,363 Likes: 11
Has a lot to Say!
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Has a lot to Say!
Joined: Apr 2013
Posts: 1,363 Likes: 11 |
There is a vast difference between conventional and hard anodising.Conventional anodising is done purely for corrosion reistance.Hard anodising is basically as hard as hardened steel and is used for wear resistance a good example is the use on motorcycle clutch baskets, I have used it on many applications from caliper pistons to aluminium rear chain sprockets on race bikes.
The thickness of ordinary anodising is 5/10 microns,hard anodising at least 50 micron thick and very hard.A totally different process to normal anodising.
I hope this is of intrest.
Regards David Wow. That thin. In certain applications that would be wonderful. Very controlled environments. Regrettably our M3W drivetrains are not.
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
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Joined: Aug 2013
Posts: 797
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2013
Posts: 797 |
I have just fitted a hard anodised rear sprocket, well about five hundred miles ago. I had it made by a local engineering company. Was quiet as a mouse for ten miles then it started to scream like a banshee under load. It's quietened down a bit now and I will inspect tomorrow or Sunday. I think polyurethane is the way to,go,for noise, steel for strength.
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