I HAVE A CLASSIC FACELIFT SPORT. I'VE HAD IT FOR ABOUT 2 YEARS NOW AND SO FAR NO PROBLEMS. THE ONLY THING THAT BUGS ME IS THAT IT'S A BIT NOISEY. THE ENGINE RATTLES WHEN I START IT UP BEFORE QUIETENING DOWN AFTER A COUPLE OF MINUTES. I ALSO HAVE A HUMMING OR A WHIRRING NOISE COMING FROM THE BACK, I WAS TOLD IT COULD BE THE WHEEL BEARINGS GOING BUT I'M NOT SURE.

 

might have a bit of piston slap... and noise from rear is probably the diff, check oil level.

 

cam followers (i think there called ) they use oil to adjust /take out any play between cam and valves like two inverted buckets with oil seal between if one or more lose this seal they clatter untill oil pumps them back up then ok till engine get cold and cycle starts again hope this helps steve

 

Is it as loud as your post? Shhhh.....