73 YEARS OLD WOMAN HERE ASKING IF ANYONE CAN TELL ME HOW FAR THE BEVEL GEAR HAS TO GO ON THE MOTOR SHAFT! i TOOK MINE APART AFTER IT SHEARED INSIDE AND THE GEAR WAS NOT MESHED ALL THE WAY IN. REPLACED IT WITH ANOTHER ONE I ORDERED FROM PISTON BIKES AND WORKS NOW, BUT BG STILL DOES NOT GO ALL THE WAY ONTO THE SHAFT. WHAT GIVES HERE IF ANYTHING. ALSO LOVE RIDING THESE LITTLE CHINA MOTORS; NO LAWS; NO RESRICTIONS; ONLY COMMON SENSE TO GUIDE YOU. ALL TAKE CARE. TWADDY38