Got a few question on some noises I'm hearing on my new bike. THe bike has just under 200 miles on it & the oil level is full when you hold the bike up level off the kickstand. The first is some rattling noises from the engine around 3000-3500 rpm. THe bike runs fine & doesn't overheat but just not sure if engine rattling is normal, sounds almost like a keychain rattling from vibration but a little louder. The other noise is from the front brakes. When you apply them you get a buzzing noise but only if you are moving, at a stop all I hear is a click when applied. Brakes seem to function fine, stop the bike no problem. I still have the original oil in the bike & the ambient temp has been high 90's to low 100's, would ity help on the engine noise to but a thicker oil in such as 20-50 or 10-50? THanks for the help.