2008 rancher 420fm electric issue(with pics)

ok so i have a 08 rancher fm that i am overhauling (bought from an x gf about :stupid:) so two years ago i replace the battery,the rectangle black relay by the battery, the starter solenoid and got the engine overhauled on the top end ,new rings, piston head , and honed. fuel pump. i went i was trying to get it back into shape i kinda notice that it wouldnt hold a charge but still trying to troubleshoot the bike . well i went to ride it one day and the engine popped like ring had busted and started blowing smoke . i rode it home . didnt really touch it after that . well i got a 2004 rancher AT on a trade a couple weeks ago .so i had an idea that i would get my 2008 running again and have two bikes . so i bought a new used engine for the 08′ FM and installed it last week bought a new battery and the new used engine fired right up . well i go to try it out in the woods with my other 04 rancher. so my friend and i are riding through the woods this weekend i am on the 08 FM for a good 3 hours and i go to reverse and the bike just kills on me engine ran perfect till it died… . so we tow it back to the camp . i go fishing and call it a day and dont worry about the bike . so i get it back to my house and this week i start looking at it . the battery is drained i hear a clicking noise at the solenoid . so i get a new one, new spare refictifier i installed that also(see pic) . i hook up jumper cables from the truck and turn the bike on, i hear electronics start turning nothing happens as far as the engine moving . so i know it is electric issue . i hear a ticking noise in the black relay that i installed . (see pic) then i see the display lights blinking (see pic). could it be the starter . or????????? help a newbie out