Author Topic: Cruising at 120 km/h  (Read 1948 times)

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Richard230

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Reply #45 on: February 12, 2021, 11:42:53 pm
The Pomeroy Dictum isn't intended to be the redline. It is everyday riding rpm guideline for longevity.
A 500 Bullet hits Pomeroy guidelines at 4250 rpm, but it redlines higher.

To answer your question for 73mm stroke and 2500fpm piston speed, it would be 5250 rpm.
At your 9000 rpm redline the piston speed would be 4311 fpm.

A Bullet at 4311 fpm would be at 7300 rpm.

Thanks. I rarely take my BMW past 5000 rpm as that is about as fast as I want to go.
2011 Royal Enfield B5 500, 2018 16.6 kWh Zero S, 2016 BMW R1200RS, 2009 BMW F650GS, 2020 KTM Duke 390, 2002 Yamaha FZ1


Karl Fenn

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Reply #46 on: February 23, 2021, 07:14:34 pm
Well what can you say an urban motorcycle for commuters.


Karl Fenn

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Reply #47 on: March 26, 2021, 06:35:59 pm
Well you hardly ever take a BMW to the red line unless you were on a race track.


Nitrowing

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Reply #48 on: March 26, 2021, 08:30:16 pm
Well you hardly ever take a BMW to the red line unless you were on a race track.
...because you'd be doing 100mph!
No wonder we no longer have a motor industry


pgdlkumar

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Reply #49 on: Today at 07:30:33 am
I did a 1200KM ride over the last weekend and it is hard to stay cruising at 120 kmph, only once I could go at 120 kmph but it stays steady at 100 kmph.  However mileage takes a big hit if you do continuous 100 kmph, if you really are into mileage