I SEARCHED FOR MONTHS EVERYWHERE FOR MATCHING PARTS FOR A PISTON, I FOUND A GUY PARTS_BOSS11 ON EBAY THAT HAD A CYLINDER,PISTON KIT FOR A LINHAE BIG HORN 400,AS FAR AS I CAN TELL THIS IS A REPLACEMENT PART THAT WILL WORK. AFTER MUCH RESEARCH I AM LEANING TOWARD THIS UTV BEING A T BOSS, I STILL AM SEARCHING FOR CORRECT TIMING MARKS TO ASSEMBLE ENGINE, I MAY HAVE TO GUESS AT TDC WITH CAM MARK ON SPOCKET POINTING FORWARD WITH BOTH VALVES CLOSED, CRAZY THING MY ORIGINAL PISTON ARROW IS POINTED UP TOWARDS INTAKE VALVE?