2008 Suzuki Hayabusa GSX1300R
In order for Suzuki to reclaim the top of the heap, changes to the 9-year old 'Busa would be many. For starters, 1,299 cubic centimeters wouldn't suffice. While bore remained at 81mm, a 2mm increase in the stroke (63 vs. 65mm) gave the new bird a respectable 1,340cc powerhouse. Compression ratio increased from 11.0 to 12.5:1 thanks to new forged pistons that attach to a new forged crank via shot-peened chro-moly connecting rods. In the head, titanium valves (all 16 of 'em!) of the same size as the first gen 'Busa reduced rotating mass enough to warrant using only a single valve spring instead of the usual duo. A new camshaft with higher lift on both intake and exhaust sides has revised timing
In order for Suzuki to reclaim the top of the heap, changes to the 9-year old 'Busa would be many. For starters, 1,299 cubic centimeters wouldn't suffice. While bore remained at 81mm, a 2mm increase in the stroke (63 vs. 65mm) gave the new bird a respectable 1,340cc powerhouse. Compression ratio increased from 11.0 to 12.5:1 thanks to new forged pistons that attach to a new forged crank via shot-peened chro-moly connecting rods. In the head, titanium valves (all 16 of 'em!) of the same size as the first gen 'Busa reduced rotating mass enough to warrant using only a single valve spring instead of the usual duo. A new camshaft with higher lift on both intake and exhaust sides has revised timing
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