Australian David Johnson, the top newcomer at the Isle of Man TT, returns to the event this year alongside Steve Heneghan in MCE British Superbike team Quattro Plant Kawasaki.

The 28-year-old from Adelaide missed the TT in 2011, but caught the eye on his Mountain debut, picking up five bronze replicas and recording a best finish of 16th in the Senior.

Johnson also set a best lap of 123.838mph, which remains the fourth fastest Newcomer's lap of all time.

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Along with Heneghan, the duo will ride ZX-10R Kawasakis in the Dainese Superbike, PokerStars Senior and Royal London 360? Superstock Races. Heneghan will also contest the Supersport and Lightweight TT Supertwin races.

Although he didn't compete at the TT last year, Johnson did contest the Ulster Grand Prix at Dundrod, where he finished inside the top 15.

Johnson has remained in the National Superstock 1000 Championship in 2012, riding for the Carbontek Racing BMW team.

Irish rider Heneghan is making his fourth successive appearance at the TT as he aims to build on his best results at the event achieved last June.

The 29-year-old from Galway picked up three bronze replicas in 2011 and also posted a new personal best lap of 120.5mph. A regular now at both the TT and North West 200, Heneghan will also ride for Quattro Plant Kawasaki in this year's British National Superstock 1000cc Championship.

John Jameson's Quattro Plant Kawasaki team, formerly known as PR Racing, started in 1995 from a workshop in Liverpool city centre and in 1999 moved up to the British Supersport Championship.

In 2002 the team switched to the British Superbike Championship and the undoubted highlight was winning the 2006 BSB Privateer's Cup with Chris Martin.

Isle of Man Government TT and Motorsport Manager, Paul Phillips, said: "We're delighted to have another of the leading BSB teams committing to the TT and shows the strength of the event.

"In Steve, the team has a strong TT rider who is progressing every year while Dave Johnson had a stunning first year in 2010 and will definitely be one to watch this year."