holding

I just put a new Shorai battery in my 650 and it started no problem on 2 different occasions during a 48 hour period. Since I'm still sorting a few other thing out on the bike I didn't take it for a ride. I did let it idle for a few minutes. Anyway, 72 hours later tried to start using the...

my berg wont rev out full its holding back like the plug is at fault but its got a new plug put a new stator on from "sparks " it also has a flat spot when i flip the throttle open fast. any ideas anyone :( its a 2003 fe 400