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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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Joined: Oct 2013
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Just Getting Started
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Just Getting Started
Joined: Oct 2013
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Can anyone report on how the new stainless sprocket that is being supplied by "The Factory" performs? I've read comments that it might be too heavy. All things being equal; I would go with the SuperMax, but you have to send your sprocket to them and wait to have it machined. Also, $535 seems pretty steep to me. Morgan will either replace your original sprocket under warranty or give a 50% discount on a case by case basis. I figure that if Morgan has gone to a stainless sprocket, they must know the original is defective. There should be a recall, but you could say the same with several other issues. Just wondering. LarryS
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Joined: Mar 2013
Posts: 1,016 Likes: 2
Has a lot to Say!
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Has a lot to Say!
Joined: Mar 2013
Posts: 1,016 Likes: 2 |
Can anyone report on how the new stainless sprocket that is being supplied by "The Factory" performs? I've read comments that it might be too heavy. All things being equal; I would go with the SuperMax, but you have to send your sprocket to them and wait to have it machined. Also, $535 seems pretty steep to me. Morgan will either replace your original sprocket under warranty or give a 50% discount on a case by case basis. I figure that if Morgan has gone to a stainless sprocket, they must know the original is defective. There should be a recall, but you could say the same with several other issues. Just wondering. LarryS Pretty much exactly what is being discussed in this topic here; Sprockets Although it's early days, there's no reason to doubt the longevity of the MMC Steel Sprocket, just the weight of the bloody thing! Hence see the above topic discussion for alternative options....
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Joined: Aug 2013
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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My understanding is the MMC sprocket is steel , not stainless steel. Can check with a magnet.
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Joined: Jul 2013
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Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
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Subjectively I'd say the factory steel sprocket is about twice the weight of the alloy - however I've now got over 1,500 miles on the steel and no problems.
I thought the extra weight might have an adverse effect on the ride but don't notice any difference.
Red Leader 
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Joined: Apr 2013
Posts: 215
L - Learner Plates On
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L - Learner Plates On
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it gives you momentum when the engine fails
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Joined: Oct 2011
Posts: 1,947
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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My understanding is the MMC sprocket is steel , not stainless steel. Can check with a magnet. While most stainless steels are austenitic and non-magnetic, some are magnetic a bit. So using a magnet is not 100% reliable.
1930 Super Sports Aero 'The Elk'
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Joined: Aug 2011
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Talk Morgan Regular
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Talk Morgan Regular
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Not convinced stainless is suitable for that application.
The extra give in non stainless steel may be an advantage but maybe not!
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Joined: Jan 2015
Posts: 237 Likes: 10
L - Learner Plates On
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L - Learner Plates On
Joined: Jan 2015
Posts: 237 Likes: 10 |
I have one of the first cars to have a factory fitted steel sprocket. Everything running ok after 1700 miles.
However last week whilst driving at crawling speed through freshly laid loose chippings I heard a crunch. A piece of stone had obviously got mashed. I haven't been able to detect any abnormal sound so assume all is ok. Very pleased I didn't have a aluminium one when that happened!
As for the weight I really couldn't care less adding a few pounds. With a 2 litre engine up front it shouldn't be an issue in any case unless one is trying to eek out every little bit extra for racing etc.
M3W 'The Mapmog' Built June 2015
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Joined: Oct 2012
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Talk Morgan Expert
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Talk Morgan Expert
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Definitely not stainless Don't know what grade of carbon steel it is but carbon it is.
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Joined: May 2012
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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Probably a recycled boat anchor.
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