hi, i recently bought a 87 trx 250 r, that was all dissasembled due to a twisted and broken frame, i got a 86 frame with it and when i went to mount the engine i noticed theres two extra tabs for a motor mount right above where the shock linkage goes,{below the swingarm}ive looked at pictures of other frames and only seen them on one other frame, does anyone know what these are for? any input is apreciated