4. Front forks: examination and renovation

  1. If the forks have been damaged in an accident, it is essential to inspect bath fork yokes, the stanchions and the lower legs, for distortion and hairline cracks. Distorted components must be renewed, do. not attempt to straighten them.
  2. Stanchions may be checked for straightness by rolling them alonq a flat surface.
  3. Check the fork bottom yoke by clamping the steering stem horizontally in a vice with soft jaws. Fit the stanchions to the yoke, with the upper ends projecting the specified test length beyond the top machined face of the yoke.
  4. Take a sight across two straightedges laid across the extreme ends of the stanchions. Check for parallelism by measuring between the stanchions at each end, at right angles. Fit the top yoke and check that the steering stem and bath stanchions fit into it without any, apparent strain.
  5. The fork lower legs are not bushed; the stanchions bear directly in the alloy casting. If the lower legs are worn or scored they must be renewed. Permissible clearance is given in the Specifications Section of this Chapter.
  6. 6 The oil seals should be renewed whenever they are disturbed, as should all sealing 0-rings and washers. Check carefully the condition of each damper rod piston ring and renew it if there is any doubt about its condition. Where fitted, check the dust excluder and fork gaiters tor signs of wear or damage and renew them if necessary.
  7. Measure the spring free lengths; if either has settled to less than the specified length, where available, both springs must be renewed.
  8. Thoroughly clean all components and dry them ready for reassembly.