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I have only once seen steel reeds and that was in a 1982 YZ250J,My 1983 RM125 used fibreglass and I haven't yet seen another engine that uses steel,thats not to say they didn't come out with them,but maybe most people change them.
In my RM we machined away part of the skirt to change the port timing,quite a common mod along with spacers under the barrel.
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