Norton Service Release Database N3/46

SERVICE RELEASE N3/46

NATURE OF RELEASE: Recommended assembly sequence -exhaust system MODELS AFFECTED: 1973 850c. c. Commando DISTRIBUTION: Worldwide (General distribution) EXPLANATION: Below is an extract of publication NV1300 "Fitting Exhaust System- Assembly Sequence" which is now included with the instructional literature in each new motorcycle case. In order to eliminate possible stresses introduced into the exaust system during the assembly and fitting, follow the procedure outlined below:   ACTION: 1. Fit L. H. exhaust pipe complete with lockring, sealing and tab washers. Run up lockring but do not tighten at this stage. 2. Fit L. H. muffler to exhaust pipe, align the mounting pommels and assemble loosely to the L. H. muffler bracket mounting rubbers. 3. Fit R. R. exhaust pipe complete with lockring sealing and tab washers. Run up lockring but do not tighten. 4. Fit R. H. muffler to exhaust pipe, align the mounting pommels and assemble loosely to the R. H. muffler bracket mounting rubbers. 5. Slide both connector sleeves tc the centre of the cross tube. Place cross tube in position and slide both connector sleeves outwards to engage with the exhaust pipe stubs. 6. Slacken off all footpeg sunport and muffler bracket bolts in the left and right hand aluminium support plate castings - to allow the brackets to swivel and adjust to the exhaust pipe/muffler alignment. 7. Tighten up the total exhaust system, commencing at the cylinder head lockrings and cross tube connector sleeves. Do not forget to bend up the lockring tab washers. Finally retighten the muffler bracktit/support plate bolts. May 1973 Norton Villiers Canada Limited