Whether the bearings were replaced was my first question. Have you always owned this bike? Do you know for sure it is the OEM BB?
A few MTBs back then had a 73mm shell with English threading rather than the more typical 68mm shell.
According to my '93ish Quality Bike parts catalog, the BB for that 400LX (actually 500/400/300LX) crank came in either 122.5 or 127.5mm and a shell of either 68 or 73mm.
Check with Harris Cyclery or Niagara Cycle Supply
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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Last edited by Bianchigirll; 12-28-14 at 05:19 PM.