 Rotax subsequently voided an agreement with Fischer in order to supply engines to Harley's Buell, with the Rotax 1000cc v-twin which had been used in Aprilia products and Fischer's first prototype ultimately supplied in a revised version for Buell 1125-series products., Fischer had begun shipping units, and in October 2009 announced a production increase for the 2010 model year.Fischer appears to have ceased production in 2012.