The timing and camshaft profiles are fully different as is that the compression ratio that has increased to 13:1 rather than 12:1 in the Enduro version. The electronic injection system still uses a 46mm Keihin throttle body but is fitted with one flap rather than the Enduro twin flap version to produce a sharper, more aggressive throttle response. Additionally, the TC449 is fitted with a twin mode turn on the handlebars, that permits access to 2 different fuel injection / ignition timing maps to produce a softer power delivery for low traction conditions.
The titanium exhaust system with carbon fibre tipped silencer has been developed specifically by Akrapovic and the five speed transmission has specific ratios to be used in MX. The suspension is provided by Kayaba with multi adjustable sealed cartridge front forks matched to a Kayaba absolutely adjustable rear shock.
