One of the hardest jobs in any four-stroke engine is being an exhaust valve! The poor little chap becomes brittle with huge temperature and pressure changes, becomes pitted and damaged, especially if a gear change has been missed causing the engine to over rev, with the valve touching the piston! If your are re-building your CB750 KO through to K7, series machine, don't compromise your work by using old worn out parts that should be designated to the waste bin! You may like to look at the General catalogue and 'Hot Items' to see just how many parts we carry for these most iconic Honda motorcycles.
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