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gavinfdavies · September 6th, 2017, 06:22 AM

I wouldn't be surprised if it was indeed a big single based on an MX-style engine. The big K has sorted out it's 250 section with a 250 single, the z250SL and Ninja 250SL. Singles cost less than an equivalent twin to make, and power output is more often a function of spec rather than cost. After all, a long duration & high lift cam cost the same to make as a mild one.

I can imagine this new 400 being a single, and then the new 650s being based on a big bored engine - the pistons from the ZZR1400 should fit in the cases, giving 665cc, and if they match the stroke they'd get 720cc, which would help them take the fight to the MT-07 and the new KTM Duke twin.

I don't know any of this, but it's all plausible.

September 6th, 2017, 06:22 AM	#45
gavinfdavies ninjette.org member Name: Gavin Location: Newport, South Wales, UK Join Date: Aug 2017 Motorcycle(s): 1996 GPX 250 --- Also '96 GPZ500, '12 AJP PR4 200, '16 Yamaha Tricity, '13 Royal Enfield Continental GT 535 Posts: 10	I wouldn't be surprised if it was indeed a big single based on an MX-style engine. The big K has sorted out it's 250 section with a 250 single, the z250SL and Ninja 250SL. Singles cost less than an equivalent twin to make, and power output is more often a function of spec rather than cost. After all, a long duration & high lift cam cost the same to make as a mild one. I can imagine this new 400 being a single, and then the new 650s being based on a big bored engine - the pistons from the ZZR1400 should fit in the cases, giving 665cc, and if they match the stroke they'd get 720cc, which would help them take the fight to the MT-07 and the new KTM Duke twin. I don't know any of this, but it's all plausible.
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