Better oil cooling

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Gsxr 750 1992
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With liquid cooling providing more even heat dissipation, the Suzuki Gsxr's engineers had the opportunity to reduce the cylinder bore centers for what became an overall more compact engine.
On the previous engine, the gap between the cylinder barrels was a necessary adjunct to the oil cooling.
With better heat control, each moving component could be made lighter, which in turn helped reduce the overall size and weight of the engine.
Yes, it had an additional system, but the Gsxr's engine was smaller and more easily packaged - moved forward and down - in the chassis.