I’ve bought this bike a few months ago.  Very pleased with it so far, but it’s obviously not been very well maintained, which is fine as I didn’t pay much and suspected that was the case anyway.  My questions relate to the exhaust system.
 
	Firstly, it clearly has much black coke inside and every time I ride the bike for any more than about 15-20 mins I get a trickle of black oil running out of the lowest joint.  I’m running an oil ratio of 60:1 - is this too much oil, hence the black trickle?
 
	Secondly, is this silencer designed to be repacked, and if so do I need to drill out the end cap rivets to get to the inside?
 
	Many Thanks