Motorcycle News (UK) - - 2019 NEW BIKES -

449cc 4-stroke single O n/a bhp / n/a ftlb O 123kg (kerb) O£ TBC

Yamaha’s lat­est in­car­na­tion of the 450 gets a more ad­vanced liq­uid-cooled, four-stroke four-valve re­verse-cylin­der 449cc en­gine with an ECU and in­jec­tion sys­tem taken from the firm’s mo­tocrossers. But Yamaha say the power de­liv­ery ar­rives in a nice broad spread of drive, rather than the pure ag­gres­sion of an MX bike. And if you don’t like the fuel map, you can change it via the op­tional smart­phonebased Power Tuner app. The clutch and gear­box have been strength­ened, the fuel ca­pac­ity boosted to 7.9 litres and there’s top-spec KYB sus­pen­sion and an all-new alu­minium bi­lat­eral beam frame that’s both slim­mer and lighter.

App-based fuel map­ping soft­ware al­lows rapid fuel map re­tun­ing

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