Initialize the ECU. If you can start it cold - on idle, don't touch the throttle for 7 minutes. Then kill it. Wait a bit, restart and ride it again. Check this out first. The 2017 bikes have a 'learn' capability.
If your riding with someone or short distance might not be worth $169 for a battery, It's a tight squeeze and the bracket is an aluminum copy for battery height. 113 x 66 x 95mm. Anti gravity has a dead battery start button on the battery- might check that out too. They are less money. Motorcycle KTM 530 EXC Owner's Manual. (106 pages) Motorcycle KTM 400 EXC Owner's Manual. Ktm owner's manual motorcycle 250 sx-f, 250 exc, 400 exc, 450 sx, xc, exc, 525 sx, xc (70 pages) Motorcycle KTM 450 EXC Six Days Setup Instructions. (31 pages) Motorcycle KTM 450 EXC EU Owner's Manual. 2014 (136 pages) . 223 75 400 313 155 488 427 232