With the introduction of the front disc brake on the 1973 models, Triumph had changed the steering stem threads to fine 24 TPI UNF, although the parts catalogs suggest that the change occurred during the 1972 model year production, so it is essential to check the threads with a thread gauge prior to ordering.
This split steering stem is machined with 24 TPI UNF threads with a 3/4″ ID. The domed head sleeve nut is finished in bright chrome plating. Sourced from TJ Wassell in the UK.
The nut is split to allow for a very light interference fit within the fork top yoke. When threaded onto the steer stem and tightened, it pulls the lower and top fork yokes together to set the adjustment of the fork bearings.
Once the pre-load adjustment on the steering head bearings is achieved, the adjustment is secured by tightening the top yoke pinch bolt to hold the sleeve nut in place. A light smear of grease on the outer body of the nut will assist in rotation of the nut within the top fork yoke.Â
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