drz 400 tapping noise

[bumf]

i can hear a tapping noise cuming from the head of my bike it the guy i bought it off said it needed shimming and i sounds like that but i mesured the valve clearance and theyre all in spec the timing chain is tight nothing else i can see loose its not a knocking more of a tapping noise
any ideas????

 

[02yz426f]

Sounds normal. Could it just be the valves making noise when they seat?

 

[Redrodent]

Drz's go clickity click. A manual cam chain adjuster is highly recommended. You can also turn a manual adjuster in and out to identify cam chain noise.

 

[bumf]

ive just taken the oil filter out and noticed that the seal at the back is missing ive heard this can cause seroius problems could this be casuing it?
also how can i find out what year it is the frame number doesent match any in the manual?

 

[Redrodent]

I don't know about the VIN
The O ring will let some unfiltered oil pass but not a loss of pressure. Not a problem if the bike was well maintained. Like I said, DRZs click like an air cooled, some of which is piston slap. Items that go BOOM $$$ and should be addressed ( hey, it's your money!)
Cam chain adjuster failure ( replace with manual adjuster)
Primary nut backs off (red locktite and retorque)
Countershaft seal failure causes rapid loss of oil (keep clean)
Stock valves can break with big aftermarket cams.

A pretty short list for a modern 4 stroke
Keep the oil changed and it's very sturdy.

 

[bumf]

the vin number is js1bc111200703842 if it helps i need the year to order parts (throttlecables)

 

[Redrodent]

There are only 2 types, E model and S/SM. All years are the same.