Afternoon all

Just discovered recently that on occasion the VXR makes what I can only describe as a clicking/tapping/rattling sound under hard acceleration apparently only in 5th/6th gear, the noise lasts only momentarily for about 1sec and I can push past it, no apparent loss in power...

It happened yesterday and I noticed a puff of smoke as it made that noise - I wonder if that suggests a certain issue..

Either way, once it's done it it tends not to do it for a while afterwards, even if I try and make it do it, it's sporadic.

Anyone else had a similar issue - should I be concerned?