1984 200es
This bike runs great... I am hearing a metal type raddle noise coming from the vent tube that runs off of the top of the engine/gear box up to underneath the seat. I don't know if I should be concerned. Some one told me that the noise could be the Cam starting to wear on the valves.
Any advice on what I should do,,,,,dive it till it dies or is their something that can be done to prevent it. Oil change?? Valve adjustment?

I just got it going, changed the oil with regular 10w-40 ran it for about 1 hour the changed the oil again with 10w-40 synthetic blend oil.. Only have ran it for about 10min and am now trying to figure out what that sound is before I take it out for a long ride again..

I didnt us motorcycle oil, do you think that I hurt it, (I just learned that their is a Motorcycle oil)

any thoughts? Thank in advance..

 

I would try switching to 20W50 before doing anything at all. Most older machines have a rough history and excessive wear....requiring heavier oil than what it needed in new condition. A valve adjustment never hurt either.
I would start with those, being they are the most common causes,...not to mention the cheapest to address. [img]i/expressions/face-icon-small-smile.gif[/img]

 

Could be the cam chain rattling. When the motor is warm, with it idling, loosen the lock nut on the cam chain tension bolt. It will adjust automatically, hopefully quiet down, then retighten the nut. Worked for my 200e