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Chinese brand Kaiyue has begun public road testing of its new 650RR. The 645cc liquid-cooled inline-four makes 125 hp with a 188 kg dry weight. Professional riders have called it 'quite fierce,' positioning it against Kawasaki's Ninja ZX-6R class at a domestic price.
A 645cc inline-four making 125 hp with 69 Nm of torque peaking at 11,000 rpm isn't just for show. Going by the 188 kg dry weight and over-50-degree lean angle on the spec sheet, this is a bike built to actually be ridden hard from turn-in to exit. A pro rider calling it 'quite fierce' checks out, from what I've seen on the ground.
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Middleweight inline-4s making a comeback, nostalgic and I'm here for it
Will this actually be sold in Japan at some point?
188kg dry is genuinely on the light side for this class
A Chinese inline-4, durability and build quality are still a big question mark
For the same money a used ZX-6R feels way safer honestly
125hp at 188kg dry, that's a monster spec sheet
