My friend just purchased a ninja 600cc bike. Eveverything runs great once except for the fact that you have to let it warm up for like 10 or 15 minutes before you can drive it. If you put it in 1st and let out the clutch it just dies everytime no matter how little or how much gas you give it. Once it warms up though it runs fine and you can shut it off and start it right back up with no problem. Any ideas on what we should check out to try to fix this because it is pretty annoying having to wait all that time just to get going. If anyone has any information on what the problem could be or anything please post. Thanks!