YAMAHA started producing LP series after SL series.  The difference between SL and LP was headstock, material and structure.

I think the SL series was not popular because it was halfway imitation model.  As a matter of fact, nobody played SL guitars around me then.

YAMAHA probably started to regard the guitar appearance as important, so LP series was completely imitated at least its appearance.

Small head was completely Gibson’s and mahogany was applied to all LP series guitars.  At least YAMAHA imitated Les Paul appearance completely.

But its structure went against the times.

YAMAHA restarted plied mahogany back. But it was an lethal selection because guitar players knew much of Les Pauls after passing through real imitation age of Tokai and Greco.  After all LP series seems to have bee ended less successfully than SL series.  4.24kg(includes strings). (Updated 2016.8.24)