Want a BMW R90S?

[Norman Bernstein]

Well... would you be satisfied with a plastic model kit of the engine?

US$ 39.99 - BMW Flat-twin engine R 90 S200 part kit, scale 1:2 - www.miuxo.com

[Uncle Duke]

What a great Xmas present for that special someone! Just ordered 2, since I'm special too....
Thanks!

[Lew Barrett]

Nice. Thanks Norm!

[StevenBauer]

Might as well get the Lego GS, too.

D02E8B0D-EA71-4F0F-989B-5E178DA1E5C0.jpg

[Bob (oh, THAT Bob)]

When I was 10 or 11, my dad helped me built a clear plastic Wankel engine model that would go round and round via a small electric motor when you pressed a switch.

[Bob (oh, THAT Bob)]

JFC! It's not a "flat" twin, it's a "boxer" twin. Flat would have both pistons reciprocating in the same directions simultaneously. Boxers have the pistons going in opposite directions to provide perfect primary and secondary balance. On small engines, it's almost always a boxer. On some large engines like a 12 cylinder, you often have a flat-12 because there is enough cylinders and polar moment to balance things out, and a flat allows using only 6 connecting rod journals on the crank instead of 12 (the latter of which, adjacent journals in a pair would be 180 degrees apart, joined by skinny sections of steel, so more complex to build). Ferraris like the Testarossa (mid engine) and Berlinetta Boxer used flat-12s. From wiki:

Unlike most flat-twin, flat-four and flat-six engines, flat-twelve engines typically use the crankshaft configuration of a 180° V engine instead of a boxer engine. Therefore most flat-twelve engines have each pair of pistons sharing a crankpin, instead of the boxer design of each piston having its own crankpin.

[goodbasil]

Was going to flog the old BMW exhaust wrench I still have.
Having second thoughts now.

[Jim Bow]

Somewhere on the internet is a pic of an R90 with an aluminum canteen used as a valve cover. Still had the screw top on it. Field repair.

[Gerarddm]

Like the old Invisible Man plastic model from the 1950s. Revell? Renwal?

[Reynard38]

Never had an R90s. Did have one of these. One of my favorite bikes.

E37F9CED-AAEF-4F1D-B404-30F1101B4217.jpg

88 R100RS. Upgraded suspension. Semi floating front rotors. Uprated alternator. Bi-xenon headlight. Sergeant saddle.

[Dave Lesser]

Did anyone successfully order one of these R90 engine kits? The same kit sells for $229 on Amazon, and some of the other items on the Muixo website seem kind of sketchy.

Current Muixo price is down to $29.99. https://www.miuxo.com/BMW-Flat-twin-...-p1314779.html

[P.I. Stazzer-Newt]

Was going to flog the old BMW exhaust wrench I still have.
Having second thoughts now.

I might be a buyer for that - an old friend died recently and I've inherited my old bike back!

[Paul Pless]

I might be a buyer for that - an old friend died recently and I've inherited my old bike back!

tell us about the friend
and the bike

[Andrew Craig-Bennett]

Was going to flog the old BMW exhaust wrench I still have.
Having second thoughts now.

Those are worth money.

Having sold my noble R60/7 a couple of years ago I am now regretting it and thinking of another one. It was the nicest motorcycle I have ever ridden. Not the fastest, or the smoothest, or the lightest, but the ​nicest.

[P.I. Stazzer-Newt]

tell us about the friend
and the bike

The friend was Graham - I first met him in early '81 - we both rode bikes he had a background in white water racing and I in Slalom - he designed and built industrial robots I was in software but with a background in electronics - so we had a lot in common - similar tastes in beer and music.

Spent a lot of time together - he introduced me to the woman I subsequently married.

Dicking about in an old C2
C2_Graham.jpg


He was a prt of the group that went to the I.O.M. - and I was "Best Man" at his first wedding.

The bike is my old R75/7 - I out over 100K miles on it before stopping riding while raising kids.....

[Andrew Craig-Bennett]

I had a schoolmaster who rode to school on an R90S. And was the expert on the painter George Stubbs. He was extremely cool.

[Andrew Craig-Bennett]

Never had an R90s. Did have one of these. One of my favorite bikes.

E37F9CED-AAEF-4F1D-B404-30F1101B4217.jpg

88 R100RS. Upgraded suspension. Semi floating front rotors. Uprated alternator. Bi-xenon headlight. Sergeant saddle.

very sensible upgrades.

[Reynard38]

very sensible upgrades.

Thanks, and I also had a 60/7. It’s the one bike I truly regret selling.

[skuthorp]

My cousin has restored the R90S he's had since new………. but he'll never ride it again now.
So it's for sale

[stromborg]

The bike is my old R75/7 - I out over 100K miles on it before stopping riding while raising kids.....

My first BMW was an R75/7. Bought used from a multi-Japanese-brand shop. They weren't even sure where the ignition key went, but I was smitten and the price was right. BMW luggage, crashbars and a Luftmiester fairing, not what any self-respecting 23 year old should have wanted but like i said, smitten. I was looking for an HD FLH at the time but one of those was way out of my scenic carpenter budget, that beemer brought me a lot of joy over the years so looking back I wouldn't change a thing.

[Paul Pless]

Dicking about in an old C2
C2_Graham.jpg


.

i've spent some time in two man slalom
ridiculously easy white water boats
a ridiculously competitive sport though and ridiculously hard to eek out those last few tenths

sorry for the loss of your very close friend

[Bobcat]

My first BMW was a '70 R75/5. Interesting bike and great on the highway and rural roads. The leading shoe brake on the front left a lot to be desired--- for example, it won't work when the bike is rolling backwards. The engine was tired and drank oil by the pint. I should it after about two years and bought a '78 R100/7 with a Luftmeister fairing with lowers. Rode that for about 6 years when branched in to K-bikes. I still a boxer R100R with a Ural sidecar

[timber_cruiser]

My first BMW was a '70 R75/5. Interesting bike and great on the highway and rural roads. The leading shoe brake on the front left a lot to be desired--- for example, it won't work when the bike is rolling backwards. The engine was tired and drank oil by the pint. I should it after about two years and bought a '78 R100/7 with a Luftmeister fairing with lowers. Rode that for about 6 years when branched in to K-bikes. I still a boxer R100R with a Ural sidecar

I too have a R75/5, mine is a 1973 LWB. I know what you mean about the front brake. I drive carefully and try to keep extra distance for stopping in mind. I love the sound of these classic airheads clicking along at about 4,000 RPM.

[Bobcat]

I think of /5 brakes as if they were 10 speed brake. I also view them as primitive ABS brakes because there ain't no way you'll ever lock them up

[Lew Barrett]

I had an R90S. Two of them, actually. They had a high speed weave, a very stiff clutch and mediocre brakes. The pumper carbs could be problematic as they aged although any R90S without them today (many were swapped out) is worth less as a result.

I sold my last R90S about 15 years ago because I wasn't riding it. That was because by modern standards, it wasn't that great to ride. It was nice to look at though.

[Uncle Duke]

Did anyone successfully order one of these R90 engine kits? The same kit sells for $229 on Amazon, and some of the other items on the Muixo website seem kind of sketchy.

I successfully "ordered" but have not successfully "received". I'm in email contact with the seller who assures me they will ship soon, whatever that means...
Does not​ give me a happy feeling....

[Dave Lesser]

I successfully "ordered" but have not successfully "received". I'm in email contact with the seller who assures me they will ship soon, whatever that means...
Does not​ give me a happy feeling....

Bad news: https://www.trustpilot.com/review/miuxo.com

My son ordered one from this website: https://www.tsunshop.com/BMW-Flat-tw...-p1319729.html
It looks like a mirror image of the Miuxo website.

He's still waiting and hasn't had any response from them. You might want to dispute your credit card charge while you still can.

It looks like the real deal is available on Amazon, but at many times the price of the scam sites

[Stiletto]

I had a schoolmaster who rode to school on an R90S. And was the expert on the painter George Stubbs. He was extremely cool.

I do like that British thing of being an expert in a field unrelated to ones occupation. A certain ophthalmologist named Harrison Butler comes to mind.

[Andrew Craig-Bennett]

I do like that British thing of being an expert in a field unrelated to ones occupation. A certain ophthalmologist named Harrison Butler comes to mind.

I forgot to mention that Terence Doherty taught History of Art for fun - his day job was teaching Biology!

Claud Worth - ophthalmic surgeon
Harrison Butler - ophthalmologist
Eric Hiscock - thrown out of the Navy for being absurdly short sighted...