Electric motor(starter) spinning and engine not turning over at all = Starter Clutch. Won't make a difference if you try to jump start.
Engine turning over slow = Battery or Connections. Jump starting may or may not help. Measure Battery voltage bike off at battery terminals, not bolts but battery terminals. Compare to voltage at Battery when you try to get starter to turn over. Drop of more than 2+ volts replace Battery. Minimal drop check connections.
2005 1100 Custom
ORKed 5/16" Lines
PODs K&N RU-600s W/PCV
PCS XXX/2 cams
Jetted & PMS Tweaked 20.0/152.5 3.0 turns
Wimmer Machine Custom Oil Cooler & Stash Tube
Dyna 3000 Step 5/ 6500 redline
6" Fwd Control Extension W/Boards F&R
Memphis Shades Bullet Fairing
Progressive 465 rear
Progressive Springs and GVE front
10,000 Monkeys throwing crap at the glass and this one thinks he's Picasso...