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I could not find a part on this forum to introduce myself, but I think it always nice to not just bust in and ask lots of questions.
I am Bor from the Netherland, I am from “64.
As a boy I always wanted to own a R100RS, I drive motorcycles sins my 18the birthday, but now after all those years finally some weeks ago I bought myself a R100RS.
It is not as fast and nimble as my Aprilia RSV, not as fast as my R1100S, but still lots of fun to drive.
The bike is from 1979 and has done about 90.000km. It looks in good shape for his age. I bought I so I could transform it into a racer, so I can race classic demo’s but I do not know if I will, the bikes just looks too good as it is.
I will try to improve the bike and there are some parts waiting to get mounted.
And RVS open exhaust from Keihan, 40mm Dellorto’s, an electric-ignition, an oilpan extender, a 324 camshaft, new shocks and rvs-brakelines. Lots of work to be done,
And there are still some points on my list, reading about the improvement of the ATE brake’s maybe going for the bar mounted master cylinder, doubting what to do with the kill-switch and starter button in that case.
Ran the bike on a dyno, last Saturday, and it made a bit more than 55 HP at the rear wheel. Anybody any ideas if that is ok, what is normally measured? The air-fuel ratio seems to be right and the bike looks to run fine.

Hello Bor, welcome to Boxerworks.

Top choice, the RS. To be as nimble and fast as your Aprilia, you just need to ride your RS in the right place.
Super tight mountain twisties.

There is a current thread regarding handlebar mounted mc. You'll get lots of help here.

So nice to keep the RS as an RS. A seriously capable machine, in my totally biased opinion.

Welcome.

Yeah, I'm more a fan of making racebikes out of machines that are already trashed in one way or another. That bike is a pretty nice looking straight RS - seems a shame to mess it up.

55 rwhp sounds about right to me, but I've never dynoed one.

No, it's not ever going to be remotely as nimble as your Aprilia, but that's not what it is: it's a "Grand Touring" machine. It's built for high-speed comfort; the Aprilia's built for quickness. They both give great pleasure of different sorts.

Welcome!!
Nice Bike!! From what I remember a '79 should pump out about 70 horsepower, so with the age, mileage, and the fact that you are taking the dyno reading from the rear wheel and not the crankshaft, I would say you have a quite healthy RS.

Major Softie wrote:
No, it's not ever going to be remotely as nimble as your Aprilia,

Not so. I've done the research.

Nice bike, Bor. I agree with Major Softie in his preference for not hot-rodding a stock/near stock RS. I think the Airhead RS is the most lovely bike on the planet, even though it doesn't fit my, um, physique. I have multiple airheads, including a green painted '82RS that I love to sit and stare at it. I'm not ashamed of that. I really enjoy my raised, wider bar, '78 R100S and my '77 Luftmeister fairing and top box equipped R100/7. (Yes, I know about that top box and my R100/7 is a fine grocery getter, parts getter, and casual rider. In my defense I've mad that top box quickly detachable so I could, in theory, take the box off and get frisky with it.)

As for my RS that I'm 'hoarding''? Well, there will come a time when my RS will belong to someone else. And that person in the far off future will have to make his own decisions as to what he wants the bike to be.

The point, I guess, of this post is that the RS is your bike to do with what you want. The trick is to know what you want for the long term. That is where most people go astray, finding out the hard way how volatile 'good' decisions can be..

Personally, I would like to see you keep that lovely bike of yours in nearly the same condition as it's in now. And if you really have the urge for one, find another RS to modify. But whatever you do, welcome to the forum, where differing opinions are easy to find.

Ken

Ken in Oklahoma wrote:But whatever you do, welcome to the forum, where differing opinions are easy to find.

Ken

NO THEY'RE NOT!

Rob wrote:

Ken in Oklahoma wrote:But whatever you do, welcome to the forum, where differing opinions are easy to find.

Ken

NO THEY'RE NOT!

I beg to differ!

Ken

Ken in Oklahoma wrote:

Rob wrote:

Ken in Oklahoma wrote:But whatever you do, welcome to the forum, where differing opinions are easy to find.

Ken

NO THEY'RE NOT!

I beg to differ!

Ken

Let's just agree to disagree.

WWDND?