218Z @ TEST YOUR CLUTCH REBUILD,, BEFORE YOU PUT IT BACK ON !!!!!SEE THE PICTURE, (CLICK ON IT ONE MORE TIME) THIS INSTRUCTION WILL WORK THE SAME ON ALL 50 TO 110/125CC SEMI AUTO CLUTCHES, LIKE THE Z50 CT70 CT90 CT110 ATC90 ATC110 ATC125'S ALL HAD.. IF IT DON'T SPIN ONE WAY BUT NOT THE OTHER THERE IS SOMETHING WRONG AND IT WON'T WORK AFTER ALL PUT BACK IN... HOLD THE OUTER ALUMINUM HOUSING IN ONE HAND AND SPIN THE CENTER GEAR WITH YOUR OTHER. WHEN I SAY IT SPINS FREELY IN ONE DIRECTION, I MEAN IT WILL SPIN CONTINUOUSLY, IT MAY HAVE (SOME_RESISTANCE) TO IT AS IT SPINS.