From Liverpool Billy had much success with his own band, working with artists such as Ozzy Osbourne, Roger Daltrey, Uriah Heep and Saxon.

It was in fact Ozzy who suggested to Billy he should take up lead vocal after hearing him sing at sound check one day.

Robert Plant attended a gig by Letz Zep. saying it was like watching himself onstage,
''I walked in, I saw me'' was his comment.

'This is like a knighthood to Billy Kulke'' says journalist Josef Schaller, in Mittebeyerische, Germany.
Where Letz Zep performed to over 12,000 people at Wacken Open Air festival.

Billy also performed a special 50th anniversary concert marking the formation of Led Zeppelin with multi award-winning producer and songwriter Guy Chambers, a band featuring Black Crowes/Oasis guitarist Paul Stacey.

Billy was invited to perform in Waitakare, New Zealand with the entre 68 piece Auckland Philharmonia Orchestra after a world side search for the right vocalist. Performing classical version of the great Led Zeppelin songs.

His performance so convincing that Led Zeppelins management themselves threatened to sue the production company for using images of Robert Plant to promote the concert, until it was explanied that the pictures are not of Plant but of Billy Kulke himself!

He has also performed on recording projects with Don Airey (Rainbow/Deep Purple) Scott Gorham (Thin Lizzy) Dennis Stratton (Iron Maiden) and Neil Murray (Whitesnake)