So what are the differnces between the two heads? I always thought they are the sameHi there. Thanks for the recommendation.
The MA10 head needs to make its way quickly to the scrap bin. The MA12 head is far better and a straight fit.
The earlier 31B castings are OK but the later cat model, 18B are probably better still.
MA10 flywheels are lighter, MA10 fron pulleys are lighter and all are interchangeable.
If you have flywheel work done (anywhere) make sure you get it dynamically balanced
dave would my ma12 head be any good to you? its just i went with the cg conversion so its no good to me now. i dint get rid of it cause its mint inside but i cant advertise it on here cause dont have a seller's account yet. just a thought cause i don't really want to weigh it in as it would be a shame really.