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Can't anyone do the maths anymore. It has to be either a 1730, or a 1580. The fact is Triumph purchased the rights for the Ariel Square Four motor or a parallel-parallel twin it will be called the Triumph PPT Cruiser




That is all good and well, but is there a big bore kit so one can take it to 2300cc....now that will be cool ! I will need to contact my cousin in Roswell to see what his opin. is