Triumph 650 & 750 2-Valve Unit Twins (63 - 83) Paperback / softback Main Details Title Triumph 650 & 750 2-Valve Unit Twins (63 - 83) Authors and Contributors      By (author) Haynes Publishing Physical Properties Format:Paperback / softback Pages:224 Dimensions(mm): Height 270,Width 211 Category/Genre Vehicle maintenance and manuals ISBN/Barcode 9780856968907 Classifications Dewey:629.28775 Audience General Technical / Manuals Edition Revised edition Publishing Details Publisher Haynes Publishing Group Imprint J H Haynes & Co Ltd Publication Date 1 September 1988 Publication Country United Kingdom Description Unit construction, 649cc, 747cc.