Download or read book Triumph Pre-Unit Twins Owners Workshop Manual, No. 251 written by John Haynes and published by Haynes Manuals N. America, Incorporated. This book was released on 1990-06-29 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Haynes disassembles every subject vehicle and documents every step with thorough instructions and clear photos. Haynes repair manuals are used by the pros, but written for the do-it-yourselfer.