83 Honda XR 500 discussion forum:

RE: 83 XR 500

RE: 83 XR 500

Knapweed said 2020-06-09 18:45

Yep, 85 BHP out of a four-stroke single that peaks at 6500 RPM is ludicrous, despite the fact it´s widely reported. The torque on this bike is 30 ft-lbs at 5500 RPM, which would equate to only 37.1 HP even if it could sustain its maximum torque at full revs, which of course it can´t.

To achieve 80 BHP, the engine would have to maintain it´s maximum torque of 30ft-lbs all the way up to 14,000 revs. Good luck with that.

The most accurate figure I have seen is 36 HP, here:

https://www.motorcyclespecs.co.za/model/Honda/honda_xr500r_79.html

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