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Old 15-04-18, 09:18
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Craig Powers Craig Powers is offline
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Understanding PS / BHP figures

I am looing at Kawasaki manual for the ZX10R 2011-15 (Gen 4)

Power figures say
147.1kW (200PS) @ 13000rpm
(WVTA (78.2H)) 78.2kW (106PS) @12500rpm
...then there are some figures for "SEA" which I assume means South East Asia models.

WVTA appears to be EU's "Whole Vehicle Type Approval".

I don't understand the WVTA figures and am surprised that they appear so detuned. Can anyone throw any light on this and what the 78.2H means?

The numbers are not a misprint because the torque figures are equally downgraded.
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Old 15-04-18, 19:04
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Did you mean SAE ?
There are a number of different legislative tests that are region specific whereby a manufacturer can “declare” official power outputs - I can try a dig out an old definition of PS I have ...its german
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Old 15-04-18, 19:43
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I think the term PS is shaft/crank power in metric measurement , but the only direct translation I can find for PS is in Welsh (P?er siafft)
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Old 15-04-18, 19:45
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It’s derived from the German Pferdestärke, or horse power.....
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Old 15-04-18, 20:31
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I think the question is "Is my ZX10R engine only kicking out 106PS and not the 200PS I thought I had" rather than a discussion on different units of measurement of Horsepower.
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Old 15-04-18, 20:36
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Oh - that wasn’t immediately obvious from the post....I think you’d know if you only had ~100ps vs expected 200...
I think the differing power outputs are related to exhaust configurations - based on quick google searches
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Old 15-04-18, 20:39
Arthur Heaton Arthur Heaton is offline
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Simples-https://www.whatcar.com/news/5-does-ps-bhp-mean/
As to the difference,who knows? Does the lower value relate to a restricted engine?
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Old 15-04-18, 21:12
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It's probably safe to say Kawasaki wouldn't have sold many ZX10Rs if they were only 104.5bhp... my '92 GSXR750 is well more than that ...
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Old 16-04-18, 06:16
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Quote:
Originally Posted by team knifedge View Post
Oh - that wasn’t immediately obvious from the post....I think you’d know if you only had ~100ps vs expected 200...
I think the differing power outputs are related to exhaust configurations - based on quick google searches

If you where looking in a ZX10R manual and your current engine was a ZZR maybe it wouldn't be obvious.

I think that the 100BHP versions where restricted in certain markets, pretty sure the UK got the full fat 197BHP version.
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Old 16-04-18, 06:50
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Last bikes I can recall being made to restricted market spec in Europe was the 1990s BMW K series and earlier Triumphs. Around that time the Japs were playing nicely at the 125 BHP line with the FZR1000 EXUPs only needing the removal of the bits of plastic in the inlet tracts to take them up to nearly 150. Then it all went mad with the Fireblades and then the Hyabusas. The rest you know.
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