Quote:
Originally Posted by culcune
The NC250 is Honda-ish based.
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Hey, just to clarify, that's completely incorrect. It's closer to the KTM RFS engine design, but it was actually a clean sheet design that Zongshen and Piaggio collaborated on for production purposes, but was designed by Kiska design, a company that does a lot of engineering for KTM, hence the similarities.
I'll have to dig up the source for the aforementioned statement, but Honda has only made three liquid cooled 250s that I'm aware of, the NX250 (definitely a different engine, not really a success for Honda), the XR250 Toronado, which is a South/Central American market motor, and the 2018+ CRF250R (which would obviously not be possible for Zongshen to have copied). If you google the images for any of those motors, it is clear that they are not a basis for the NC250.
That being said, Zongshen has adapted the head to a CB-based bottom end, as evinced by the Lifan swap project seen here.