The SM 450 R and SM 510 R models are genuine replicas of the world Motard championship winning machines ridden by the official Husqvarna team. The two engines that differ only in strokes of 60.7 and 67.8 mm respectively now have larger sized valves. The intake valves have increased from 33 to 37 mm and exhaust from 28.5 to 31 mm. The intake cams are also new as are the redesigned inlet and exhaust manifolds. The SM 450/510 models now benefit from a newly designed Gianelli exhaust system that improves performance and meets with Euro 3 standards. New 50 mm Marzocchi forks, tried and tested in World series races by Adrien Chareyre are now fitted to the machines. There is also a new steering head that accommodates a 205 mm hub and features a “mono-bolt” upper plate The Sachs shock absorbers have been completely re-calibrated in line with the new front end set-up. The handlebars are fully adjustable (better suited to Motard) and come complete with plastic hand guards. The new digital instrument panel and more powerful headlight are particularly important for off-roading. The rear brake disc now measures 240 mm with 26 mm Brembo callipers governed by a pump with an integrated reservoir whereas the front brakes have been fitted with new mixed-composite pads. The front brakes are completely new with a 320 mm diameter disc, “racing” pump and adjustable lever. The radial callipers further improve braking efficiency and adjustability. The 450 and 510 R are fitted with San Remo wheels and a new rear mudguard that has been modified to both support the lamp cluster and number plate carrier.