Timing tech New VVT system explained
Meet the new GSX-R’S clever valve system
The GSX-R1000 has always been known for mid-range grunt, but over the years Suzuki have had to go for bigger bores and shorter stroke to chase top-end power. The K9 was the last overhaul, but the 2017 model is much more over-square. Suzuki’s Variable Valve Timing ( VVT) has enabled engineers to keep the mid-range without complicated electronics.
Suzuki’s Motogp gurus developed VVT over 10 years to get around the FIM rules that state: ‘variable valve timing and variable valve lift systems, driven by hydraulic and/or electric/ electronic systems, are not permitted.’ So this is the product of Suzuki’s interpretation of those Motogp regulations, and this year the sportsbike-buying public get to benefit from it.
As the engine spins faster, steel balls move outwards, forcing the phaser apart and changing the timing The cam phaser is split into two halves. Springs (left) push the two sides together. Altering the tension of these springs will change the revs at which the timing changes
Full launch report on the new GSX-R in next week’s MCN