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Is this a 12a rotor?

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Old Apr 10, 2019 | 01:12 PM
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geilkyle2
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Is this a 12a rotor?
Been searching high and low with no luck by the part number? Anyone here able to shine any light on this part number?

1011 23 104b
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Old Apr 10, 2019 | 01:51 PM
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could be....take a pic of the combustion side
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Old Apr 10, 2019 | 05:58 PM
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12A is 70mm wide/deep. 13B is 80mm.
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Old Apr 10, 2019 | 06:28 PM
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70mm wide, 3mm apex seal groove
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Old Apr 10, 2019 | 06:38 PM
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No lettering in combustion recesses
What would this be worth, it's brand new in the box still ?
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Old Apr 10, 2019 | 08:54 PM
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Price is hard. I would imagine guys would want a matched set, Atleast I would if I was buying new rotors I'd want two
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Old Apr 11, 2019 | 03:02 AM
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From: queens ny
Originally Posted by geilkyle2
70mm wide, 3mm apex seal groove
hav a pair like that..... only asked once but no one could tell me.... maybe somebody knos..
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Old Apr 11, 2019 | 09:09 AM
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From: https://www2.mazda.com/en/100th/
Originally Posted by geilkyle2
Been searching high and low with no luck by the part number? Anyone here able to shine any light on this part number?

1011 23 104b
its for a 74-75 engine, note that it is MDR and not LDR like all the other 12A rotors. its fine, you would need the pair
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Old Apr 11, 2019 | 04:00 PM
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Originally Posted by j9fd3s
its for a 74-75 engine, note that it is MDR and not LDR like all the other 12A rotors. its fine, you would need the pair
Had to look up MDR (medium deep recess) and LDR (long deep recess). Learning new things is fun!
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