Bike idles rough and stutters
Hey guys my names max and i just bought a yamaha fz6 2005 16k miles. The bike was dropped and it was sitting for 5 years. I jump started it and it fired right up. Only problem is battery is completely dead and it idles rough, stalls if i pull in the clutch. Dosent stall if i rev it a bit. It does idle but like i said its a little choppy. When riding the bike the motor def is strong because it runs 100% and i can feel it bc its fuckin fast and sound like its running on all 4. Only problem is in the lower rpms its choppy and also if u hold the throttle at like 4k its a tiny bit choopy. If u roll the throttle tho it run like new. My first thought is the battery that is not giving it enough spark or the injectiors arent at 100%, or even the fuel pump. I think this because when i leave the jump cables on the bike from the car battery the idle isnt as choppy and dosent throw a check engine light. I got a new battery but it still dosent start the bike, all i get is a fast clicks. Somewhere around 6k the check engine light flashes on also but dosent stay on. If anyone can help me it would be much appreciated. If someone has a fb i can send a video of it running. Thx sm!