2004 Yamaha YZF-R1 Chassis Details 1

• All-new, aluminum Deltabox main frame rails pass over the engine instead of around it, resulting in a structure that's 200% more rigid vertically, 50% stiffer laterally, and 30% stiffer torsionally.
• Overall frame width is reduced from 464 to 395.6mm, which produces more comfortable ergonomics as well as more efficient aerodynamic penetration.
• All-new, Controlled Fill die cast, truss-type swingarm is 30% stronger and long for optimal traction and feedback.
• Front-end geometry with 5mm more fork offset and reduced trail from 103mm to 97mm for increased maneuverability.
• The rider, is repositioned for greater comfort too: Clip-on handlebars are 10mm higher, footpegs are 2.5mm further forward and 7.5mm lower, and the fuel tank is narrower.
• Controlled Fill die cast, detachable aluminum subframe is light, strong and allows easy rear shock access.
• Rear brake caliper is 12% lighter and rear disk is 10 grams lighter.
• Dual 320mm front disc brakes; lighter/stronger, forged one-piece radial-mount calipers and Brembo radial-pump front master cylinder with adjustable lever delivers great braking controllability.
• Fully adjustable KYB inverted telescopic front fork gets stiffer springs, 4.7" of travel, and rigid 43mm tubes.
• Piggyback rear shock gets a stiffer spring, 5.1" of wheel travel, full adjustability and a lightweight, accessible aluminum preload adjustment collar.
• New, 5-spoke wheels are 10% lighter in front and 7.5% lighter in rear for improved acceleration, deceleration, handling and suspension action.
• Underseat titanium exhaust system is lightweight, reduces drag, enhances mass centralization, allows 56 degrees of cornering clearance-and adds to R1's predatory appearance.

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