Dyno tune.

SteveD · Post by **SteveD** » Sun May 17, 2020 9:18 am

Interesting gains.

https://parisdakarmelbourne.com/dyno-mi ... haUvgRpU7w

Rob Frankham · Post by **Rob Frankham** » Mon May 18, 2020 4:56 am

What I find interesting about this article is that, despite all the hype and claims of 'massive' improvements, the output measured on the dyno is actually marginally less than the rated output when the bike left the factory.

Hmmm

Rob

melville · Post by **melville** » Tue May 19, 2020 8:44 am

Factory rating was at the flywheel. My R75 is similar--BMW says 50 hp but I'll bet it's between 35 and 40 at the rear tire.

barryh · Post by **barryh** » Tue May 19, 2020 2:53 pm

melville wrote: ↑Tue May 19, 2020 8:44 am Factory rating was at the flywheel. My R75 is similar--BMW says 50 hp but I'll bet it's between 35 and 40 at the rear tire.

Back when these bikes were new, some of the US road tests included a dyno chart at the rear wheel. I just checked one for an R80/7 and it made 37.1 HP

chasbmw · Post by **chasbmw** » Thu Oct 15, 2020 8:38 am

A 70 BHP RS will show around 55Bhp on a rear wheel Dyno, Shaft drive involves real losses in Power and I guess BMW tested on a bare engine, no alternator or starter, with the addition of some magic powder to get to headline figure of 70 Bhp

Rob Frankham · Post by **Rob Frankham** » Thu Oct 15, 2020 4:52 pm

Most, if not all, vehicle manufacturers quote engine output at the flywheel.

Rob

Boxerworks.com

Dyno tune.

Dyno tune.

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