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July 5, 2024 at 8:29 pm
#288880
Tinguy your not quite right the 53/54 super fast-twins were similar. They all used the same power head. ’55 was the first year for the five bolt lower unit. Five bolt LU was used on 15/18/20/25 for a sack of years and it held up well. Somebody will correct me if I am wrong but I think that is correct. The five bolt was also used on the ten horse 55/56/57.
dale
Once I thought I was wrong….but I was mistaken!