Torque at low rpm and smooth at high rpm!
In 1976, Suzuki was the last company to adopt 4-stroke engines with the GS750, followed by the GS1000, and in 1980, the GSX series with 4-valve TSCC combustion chambers evolved at a rapid pace. The GSX-R series was a series of new challenges in various categories that could be said to be all-rounders.
The GR650, released in 1983, was a motorcycle that challenged the two faces of the two-cylinder and four-cylinder engines: at low rpm, it was torquey with a large flywheel mass, but beyond about 3,000 rpm, the flywheel mass became smaller and the high rpm range was smooth with little torque fluctuation. In other words, it was a motorcycle that challenged the two-faced engine of the two-cylinder and four-cylinder engines.
This mechanism is a sub-flywheel that is closely connected to the crankshaft by a spring below 2,500 rpm, resulting in engine characteristics that are also felt in the so-called two-cylinder-like low-speed torque and torque peaks that fluctuate as the engine turns.
When the rpm exceeds 3,000 rpm, the centrifugal clutch disengages and the sub-flywheel becomes free and has nothing to do with engine rotation.
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Original Source. [ RIDE HI ]