ɪn lˈeɪt nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi θɹˈiː ðeɪ wɜː dʒˈɔɪnd baɪ ðə kˌeɪdˈiː wɪð ɐ lˈɑːɹdʒɚ wˈʌn θˈaʊzənd tˈuːhˈʌndɹɪd sˈɛvənti wˈʌn sˌiːsˈiː kəpˈæsᵻɾi baɪ ɹᵻtˈɜːnɪŋ tə ðɪ ˈɛftˈaɪp stɹˈoʊk ʌv ˈeɪɾi θɹˈiː ˌɛmˈɛm bˌʌt wɪððɪ ɪmpɹˈuːvd sˈɪlɪndɚ hˈɛd ænd tˈaɪmɪŋ pˈaʊɚ wʌz ˈʌp tuː .
In late 1933 they were joined by the KD with a larger 1271 cc capacity by returning to the F-Type stroke of 83 mm but with the improved cylinder head and timing power was up to .