For the newcommers, the first wyvern you kill will most probably be the Yian Kut-Ku in the 2 star village quest "the great jumgle kut ku!". This can be hard for some people so i recomend having a great sword with an atack over 300. If it has a water atrebute then thats even better! (this is there weekness) when you get to the jungle base camp colect the map, rations, first aid med, flash bombs, whetstones, paintballs and sm barrel bombs. Eat the rations to get you a full stamina bar (more blocking/running enagy) and head out into area 2, wait there and he should come, he might even be there. first off paint ball him so you know where he is when he goes walkies (trust me, he will) then run a distence back and flash bomb him, if you did it right then he will have stars over his head. next place a barel bomb under him and run. Once it explodes then put another bomb under him. then hack at his wings with the front slash and the back slash moves. When he becomes not dissy, flash him again and keep hacking at his wings wilst doging his tail! Remember, atack the wings! if this gets to hard to keep doging the mouth/tail then you can attack his stomach, tou dont take off as much health but its a bit safer. After about 10-15 minuets he should be dead. if you keep at this then maby you could be able to make full Kut-Ku!