i have a 1986 trx 200sx which i am tring to find a new cam for but i was just wondering if a atc 200x cam and piston would work in my quad and if the three wheelers engine would fit perfectly in the quads frame without any parts (airbox,etc) removed or modified. i would greatly appreciate any help.

 

No three wheeler parts will fit. The SX has a strange head with the valve adjusters on the side. All engine part swill have to be for a SX or a newer type two 200 4wheeler.