Tonus and Simpson to race 2018 YZF450

Yamaha's Arnaud Tonus will race the all-new 2018 YZF450 at the MXGP of Czech Republic in Loket this weekend and his team-mate Shaun Simpson will also get the bike on his return from injury. Swiss sensation Tonus, who recently signed a two-year deal with Yamaha Motor Europe, will be racing