Old multi-cylinder bikes of the 50s to later on. Japanese, British, Euro, etc

[dangerous]

I wana see this Muth BMW...

[T.W.R]

I wana see this Muth BMW...

One of the birds in the Plains MC had one for years. Pretty exclusive one site reckons just over 6500 made and another site says just over 9500 between 1981-85 so a hell of a lot rarer than a Katana will ever be

1981 R65LS

[dangerous]

One of the birds in the Plains MC had one for years. Pretty exclusive one site reckons just over 6500 made and another site says just over 9500 between 1981-85 so a hell of a lot rarer than a Katana will ever be 1981 R65LS

Frances... I remember it, she might still have it, yeah Im with ya now I can see it

[T.W.R]

Frances... I remember it, she might still have it, yeah Im with ya now I can see it

That's the one

There one on TM at the moment too

http://www.trademe.co.nz/motors/moto...-690096575.htm

[Flettner]

I see it as like all designs a compromise. Although in the Black and white pic in my post it does look like it does overhang the crank so maybe its not so bad? it could also be 6 transfer port as well?
In this case in order to both keep it reasonably narrow and keep the wheelbase down.
i would like to see some inside pics myself

I only just seen the inside pics of A "real" KR250 the other day. Its so bloodly clever.........
I like it far far better than a Rotax or its ilk. IMO its a better compromise........
I would do a v angle version though.........If i would get around to it lol.
Having said that i like the look of a repackaged longitudinal boxer "Koing but different" sort of 45 degree and stacked on the gearbox.

Just add a gearbox, 700cc twin, tilt the cylinders forward say 30 degrees and stuff the gearbox underneath. Also add EFI, vairable rotary valve and power valve. I'm sure a frame of some sort could be found for it. So who's up for one?

[Flettner]

I for one would like a road / track bike powered by an engine such as this one day and I'm sure there are others out there also.

[WilDun]

I for one would like a road / track bike powered by an engine such as this one day and I'm sure there are others out there also.

FLETTNER.
Yes, I like this design ( I guess this one is for a microlight), - I also like the idea of a variable inlet valve - variable backplate to control both the opening and closing sides of the port?

HUSABERG. Not sure if a 'v' arrangement is better than this, as balance and compactness would favour this arrangement, two very good reasons why it would have been chosen for a microlight.

The 'V Due' with its 'V' arrangement may have been ok. I dunno, but it failed.

Pity about gearboxes and two stroke exhausts which would complicate this otherwise very neat engine design!

But then, I unfortunately don't have the money or the health, all I can do is drool, so count me out.

Will.

[Flettner]

This is the second version, same cylinders different configuration. I do have an interested party wanting a road going version of this engine, but one is not enough. ( two if you count me but I want either the tandem twin or the three cylinder version of this twin, 1050cc).

[F5 Dave]

I have a 1050 Triple, -but sadly no where near as cool as that

[Kickaha]

( two if you count me but I want either the tandem twin or the three cylinder version of this twin, 1050cc).

Hmmmmmm we're allowed up to 1300cc two strokes in Sidecars

[Flettner]

Am I mistaken? Isn't / aren't there people out there that still want twostroke road bikes? Why not build a batch of bikes?
I've worked from home ten years now ( Autoflight Ltd ) and was out at a cafe a week ago ( I don't get out much ), you know street corner thing, and was disappointed at the lack of motor cycles riding past ( it is Hamilton ) and none were twostrokes at that!
Why not? They are not that hard to build. Wobbly could make "mean as" ( apparently what the young people say these days ) pipes.
Robs got EFI all but sorted, There is a perfectly sound foundry in Thames. AND we could make exactly what we want, no having to put up with manufactures short sightedness. That would be not making them powerful / light enough. Imagine a 220HP ish tripple weighing not much than a handfull of chainsaws.
Or not.
Just a thought.

[WilDun]

How are the vibration levels in the big twin?
I seem to remember in the early days the bigger twins suffered badly from the vibes (at least the riders did!). - Guess it's one up one down?

[jellywrestler]

Hmmmmmm we're allowed up to 1300cc two strokes in Sidecars

yeah and old flatmate was building a 5 cylinder waterbucket for one years back, crank was made of NOS TR750 parts, weighed a ton too

[Flettner]

How are the vibration levels in the big twin?
I seem to remember in the early days the bigger twins suffered badly from the vibes (at least the riders did!). - Guess it's one up one down?

You may notice on the twin cylinder gyro engine an after thought ( ballance shaft ). When I first built the engine it shook badly from about 3500 to 4000 and after that through to 7000 it was not as bad but never the less uncomfortable. So bad I was not willing to let it fly, I was sure the engine would come right out of the frame sooner or later! SO I manufactured a counter rotating ballance shaft, what a difference!
With this setup you could probably run different firing orders and not have to stick to 180 degrees. You will see it's a case reed type engine ( V force reeds ).

[WilDun]

Am I mistaken? Isn't / aren't there people out there that still want twostroke road bikes? Why not build a batch of bikes? Wobbly could make "mean as" ( apparently what the young people say these days ) pipes.
Robs got EFI all but sorted, There is a perfectly sound foundry in Thames. Imagine a 220HP ish tripple weighing not much than a handfull of chainsaws.
Or not.
Just a thought.

Yes, I would like to see that! and you seem to have the means, the enthusiasm, the contacts (with people with expertise here) and faith in the two stroke.
We are allowed much more latitude with the use of two strokes in this country, why not make use of it? - at the same time of course, making sure that the "two stroke pollution" problem is addressed! - How about OMC and Bombardier's technological advances in this area.

Trouble is, the young people have been conditioned into following American trends, which means complicated, heavy and expensive four strokes, (some as we know, being very retro and agricultural, with about the same power output as an old V-Dub) - whatever.
With the majority of young people at the moment, it isn't cool to have a two stroke on the road and they are the potential customers!

I'm very interested in flying too and have dabbled in that a little in the past. I do like your tandem twin concept. - do you use a proprietary gearbox? - do they give any trouble with prop backlash etc. (torsional vibration)?

BTW - who is Rob? - I thought it was you, - sorry, you're Neil!
I've got to get to know who is who around here I guess!