xs650 engine

hey folks, starting a new build and i've got two engine's in my possession one is seized that i've been working on freeing it up all this week with no luck as of yet (been sitting for approx 8 years with no carbs/exhausts or anything covering the holes o_O ) at this stage ill probably just pull...

alright guys so i picked up a bike a few weeks ago that was stock, turned it into a bobber and now im focusing on the engine. Im running pod filters and open pipes. i know i need to rejet my carbs, (does anyone have any idea what jets i need to order?) Im having a couple of problems right now...

First I have the top end apart and I need to know as long as I am in here what things need replacing other than what I can see? Someone told me about some plastic parts that I should replace but I can't remember what parts. One of the cilnders has a line in it that I can feel my buddy said it...