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Is this a 12a rotor?

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Old 04-10-19, 01:12 PM
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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 04-10-19, 01:51 PM
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could be....take a pic of the combustion side
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Old 04-10-19, 05:58 PM
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12A is 70mm wide/deep. 13B is 80mm.
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Old 04-10-19, 06:28 PM
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70mm wide, 3mm apex seal groove
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Old 04-10-19, 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 04-10-19, 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 04-11-19, 03:02 AM
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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 04-11-19, 09:09 AM
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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 04-11-19, 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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