I just did it I didn't use Yama bond. Damn it I forgot what the name was but no leaks or nothing and it's was run wtfo on EHS Dyno yesterday so I know mass vibration and load went thru engine.
07-700(686) based 778cc Cuervo Racing, +2 extreme port Cuervo head port and a Cuervo/HDD5050 cam, 14:1CP piston,105.5 bore, +5 stroke, WK54mm TB, Denso injector, dynatek programable ignition, old pc5, DMC Force 4 pipes. Tuned by Eric at EHS Racing, 87 HP 64 FT.LBS TQ. To me it's the ultimate trail quad if you love the edge of control and dodging trees at 75-80mph!!!