featherbed frame

Please,
I would like to learn the differences from wideline and slimline and how i can recognize the differences.
I would be happy to see posted ome pictures.
Whoch engine is possible to fit into the frame?
Maybe a Trident engine?
Thanks.
Ciao.
Piero

Whoch engine is possible to fit into the frame?




B.O.P. / Rover 215 .




Hillman S.O.H.C. four / Hansen Mundy ' Climax ' derivative . http://www.imps4ever.info/tech/cov_clim.html



Formular Ford / BDA / ' Kent ' 1600 pushrod . Could cut it in half , of course .



Eventually fitted with Dual D.C.O.E.s & a tourque converter , sans trans . dustall-domiracer-bed-t11983.html?hilit=dustall





:lol: :lol: :lol:

:twisted:

$25K in '72 is pretty steep...

4 valves per cylinder dohc was pretty exotic in 1972, thats a fully fledged race bike back then.
Still a lot of $$ like you say though.

Now that we are all confused about what a wideline and slimline is, maybe someone should answer the question....

Short answer is that slimline has the area around the knees pulled in narrower, for rider comfort.
This happened around 1960, so that all 650 and Atlas bikes had this, and 1960 and later dommies.
And singles, also with the metal tank badge, for 1961.
The rear subframe used curved tubes around the top rear shock mount, where the earlier widelines used straight tubesets.

This is much better than any of that other idiocy:

http://it.paperblog.com/ebay-find-norto ... r-1705877/

Look Ma , No Brakes .



:|







from : http://www.diagnosis2012.co.uk/vtwinspecials.html

Jawa ? JAWA ? .



http://www.flickr.com/photos/havik/5963 ... otostream/

And now for a useful, drivel-free reply....

As their name implies, the wideline featherbed frame holds a constant width between it's top tubes which the fuel tank and seat rest upon, where the slimline frame has top tubes that are wide by the steering head and come closer together at the back of the fuel tank.

Two actually useful photos, wideline at the top, slimline at the bottom:

This thread is a repeat of the same one on the 'other classics' page.
Answered months ago...

" Whoch engine is possible to fit into the frame? "



The Mazda rotisary and the new Ford 1000 c c triple should shoe horn in there too . :twisted:

Most of the frames for the earlier Japanese racers were similar to the featherbed. In the 70s the Japanses stopped Europeans from fitting trick British frames around their motors. I believe the Suzuki TR750 that Pat Hennen rode successfully came from America fitted with a Harris frame. The original TR750 with the featherbed style frame, was a dog. The featherbed was a really great frame for it's time, however it has it's limitations when you try fitting modern motors to it. Buy yourself a Molnar Manx.

side-by-side

Wotll they do , mista .


Z1 Atlas .
barf if icon

]http://thekneeslider.com/norkaw-kawasaki-z1-power-motivates-a-norton-featherbed-frame-by-mick-king/http://thekneeslider.com/images/featherbedkawasaki.jpg

O. M. G. :roll:

N.S.U. , German aircooled 1200 , as per MUNCH .



http://thekneeslider.com/norton-nsu-spe ... ni-mammut/

Thats a MANX Frame ; but THIS is a WORKS Manx Frame . :shock: :lol:





" Rear brake mounting and modifications to clear the Burman 5 speed gearbox "

flogged from http://yorkshireferret.blogspot.fr/2011 ... erbed.html where theres more PICTURES .

" The Anatomy of a 1954 Works Norton Featherbed frame "
------------------------------------------------------------------

The featherbed frame has a few weak points,
1 The frame can bend under the headstock next to the gusset,you can spot this by eye.
(just a lite bump up a kerb can do this)
2 The bottom rear cross rail can split in two places where the center stand comes back and hit it.

3 The gussets that the swing arm pivots on can split,usually when people have drilled extra holes for footrests and things.

4 Rust can eat through the metal when water has got in through holes in the tubing/

Care must be taken when building a special that a proper head steady is fitted,this very must have item it is part of the frame.
There are two types of frame tubing one is normal cold drawn tube and ark welded,the other is the Manx frame which is of renolds 531 tube and is siff bronze brazed weld,I was told that the manx frame should be annealed every now and then to keep its strength,apparently the factory did this on their works racers.

peter james owen said:

,I was told that the manx frame should be annealed every now and then to keep its strength,apparently the factory did this on their works racers.

Click to expand...

That sounds a little unlikely ?
The frames were replaced by a new batch of factory racers every year.

Even the top privateers had a new bike every few years,
as the old models were eclipsed by the later models.
Nortons race bikes rarely stayed the same for more than 2 years....

Coming back to the works bikes , I think people are confused with the term works racers,from the mid fifties the works nortons were on a very small shoe string and they developed things very slowly.for gods sake they did not have welding gear at the factory in bracebridge street,if anything required welding joe craig asked one of the mechanics to go home with a flat bed sidecar to pick up his private gas bottles,so much for no expense racing,and at some continental meetings they put the bikes in the guardsvan of a train and went that way.
Doug Hele when he took charge after Joe Craig left in 1955,only did small engine development on the Manx and the dommiracer twin,there was no new bikes every year trust me Amc held very tight purse strings "so ther was no new bikes every year.
All frame manufacture were by Renolds tubing where Ken Sprayson was working,they frames were made in small batches there was no special one offs for the factory
the only bike that had a lot of difference was the low boy dommiracer and I think they only made three of them in about 1960.the factory did alter some frames to put an oil reservoir in the frame for chain lube,and they did a couple of lowered head stocks to make the Manx height lower,and changed the brake system to 4 L/S
and the back hub changed to sprocket on one side and brake on the other.
Annealling the frames was standard practice on Moto Cross bikes,for the same reason as the racers
I remember Dave Hughes raced the old "Wheel barrow"Arter Matchless at Snetterton,when the frame came apart while he was on it,Peter Williams was apparently shocked to find that the bike was still been raced as he thought the frame was so light and only good for a few years only.He was told that the frame should have been annealed every now and then.

While this is (mostly) all very true, there were quite a few different years of manx featherbed frames over the years, when you look closely,
they only stayed the same for 2 years at most - there were a lot of detail changes when you look closely over the years - the bracketry in particular.
Ken McIntosh in NZ makes about perfect replica frames for each year version, and he lists quite a few varieties.
And a lot of components for the specific years.

In the years when Nortons did field factory race bikes, they were built up just before the IoM TT races in June.
Nothing used or 2nd hand about them....

Stories of 'needing to anneal the hi-tensile 531 frames' keep popping up,
but no-one has ever met anyone who has actually seen or knows of this being done ??
Ken Sprayson of Renolds Tubes Ltd seems to be keeping mum if he knows about it too.
Not that he was the only welder that worked there.

there was no special one offs for the factory

Click to expand...

:?:

Not sure WHO made these , but they don't look quite standard , quibbling maybe - but to every rule theres a exception .





and seeing we're being awkward , this likely isn't Reynolds , but it is different . from http://madsundaysurvivor.blogspot.com.a ... chive.html

Nuevos chasis más bajos autoportantes del aceite en su interior, como este modelo que pilotó Geoff Duke en 1958

Click to expand...

Though it may well be , as REYNOLDs did ' one offs , such as theyre Honda Handling horrors remedy .



seeing someone mentioned Wheelbarrows , and Glorious Pictures Abound . :?


one or two obviously need resizeing , clicking on them might get the full picture .