GR Motorsport has confirmed it has released former British Superbike front runner Karl Harris from its team, citing the rider's lack of motivation to be competing in the National Superstock series.

Harris switched to the Superbike support championship when he was unable to secure a seat on the 2010 BSB grid, the former HM Plant Honda rider landing at the GR Motorsport Aprilia team.

However, despite being a former European Superstock champion, Harris has struggled for form on the RSV-4, scoring just three points in the first three races.

Claiming Harris' 'mindset and performance has deteriorated', team manager Brent Gladwin says he felt it is necessary to start afresh with a new rider.

"Since very early on it became clear that Karl was disappointed to be riding in the National Superstock championship. Karl has an expectation to be riding in BSB and struggled to find motivation since his move to Superstock.

"Despite the team making significant developments to the Aprilia RSV4 Factory, Karl's mindset and performance deteriorated. Following a meeting with the rider a mutual agreement was reached to part company for the sake of the team and sponsors.

"Following the first Brands Hatch round our fuelling and race prep work has increased power by 11bhp and reduced weight by over 10kg. Ideal lap time data showed the capability of the bike was being masked by inconsistent lap times.

"The set-up data we share with Sheridan Morais has seen his RSV4 Factory constantly improve and secure wins in the South African Championship earning him a factory ride at the Kyalami WSB round.

"We would like to wish Karl the best and remain on good terms; we are now in the process of testing a number of replacement riders."


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