hi y'all

Are you on the original lifters? I'd get a second opinion from a reputable Indy. Lifters should be changed before 70,000 kms 

Don't go back to the dealer, find a good independent mechanic.
Get them to check the valve train/cam chest for issues.
Some noise is normal, but it sounds like yours is excessive.

What synthetic oil are you running? My 103 engine was quieter when I swapped HD Syn3 out for Mobil 1 V-Twin. Doesn’t smell as good, but I can live with that.

thanks guys

Nothing wrong with the OEM gear, although when you do replace the lifters replace them go with quality like Jims or S&S.
Noise top ends a re normal with high lift cams - although it should not be as bad as you make it sound
Stay away from the Synth oil as I found my Evo started to leak oil and sound like a damn sewing machine when i swapped over to it.  Dino oil is definitely quieter!
Often as not the cure is to slightly over tighten the pushrods by a turn or two.

But if the engine is stock it won't have adjustable pushrods 

Good point.

just in case anyones interested.  I fitted the Rockouts  as suggested by hot and heavy, did the job nicely, shes not rattling anymore, many thanks.

I fitted a set to my 90,000km SG not long ago, top end is quiet as a mouse now.

i bought some Rockouts a couple of years back and finally got around to putting them in as I was doing the breather service over the weekend

The retainer bolts all had witness marks, more so on the exhaust side (maybe the added heat there loosens em up a bit more with expansion). End play was in spec so all good there.

Took the bike for a good decent ride and the top end is dead quiet now, just hear the exhaust note. All I can say is these things have quietened down the top end to almost silent.
For a long time I have been chasing a rattle (almost vibration) when under load at about 2500rpm upwards, constantly checking heat shields, shifter linkages etc however this was the reason all along
A good thing with them as well is they assist in lining up the rocker assembly dead on to the pushrods and valves.
Piece of cake to install, only wait time is lifter bleed down so i did one cyl at night and the next in the morning

If you have the top end apart, do yourself a favour

both my Dyna and Iron have the sewing machine noise. The Iron 883 has loud pipes to cover it. But if wearing half-face helmet, I can still hear the sewing machine noise. Wearing ear plugs or full face helmet, sewing machine is gone. 

I've complained a couple of times to the dealer about my 107" Milwaukee 8 being noisy. Swear it's getting louder but they just keep telling me it's normal...

I have the same problem. It seems to.come and go. Mentioned to dealer at first service. Nothing changed.