Thursday, September 30, 2010

Enclosed rockers, springs and double camshafts

By Roger

One of the main disadvantages of bound copies of "The Motor Cycle" that are in the Brooklands Museum library is that the advertisements have been removed. A small number of complete copies of the magazine have recently been added to the collection and some of the "small ads" have revealed some interesting machines. The one below from Kings offers a Norton International to racing specification with totally enclosed rockers and valve springs (!) and this made me have another look at an earlier blog.


The "mystery" of the single versus double overhead valve Nortons in the 1937 TT has already been resolved by Mick Woollett but this is an opportunity to add some more to the background. The Norton and Velocette directors were on very good terms and often lunched together. In 1935 the introduction by Velocette of enclosed rockers using the "dog kennel" cambox was so well publicised that when Norton used its enclosed box for the TT there were rumours that it had been made by Velocette. The rumour gained enough credibility that Norton were forced to advertise the fact that it was their own design and manufacture.

This cambox (above) is the type that appears in the 1983 article where the springs are exposed and the valves operated by short tappets that protrude from the bottom of the box. For 1936 Joe Craig was keen for the Nortons to use a double overhead camshaft arrangement and engines were taken to the Isle of Man. Lack of time for development meant that the small diameter solid tappets were retained and in an article in 1943, entitled "Development and the Time Factor", Joe Craig said that this lack of time caused Guthrie and Frith to revert to the 1935 type of valve gear. This is the likely explanation for the confusion over which type was used the subsequent year.


For 1937 the double cam arrangement (above) had been developed using larger diameter hollow tappets and this was used in the race as it had proved to be reliable in testing. The main advantage was that they proved to be considerably faster as even the 500cc could be revved to 6,500 rpm.


So what was the machine that was advertised in February 1939 as neither of these boxes had enclosed springs? There was a third layout attributed to Edgar Franks which is reported to have been tried by the factory which used coil springs which together with the rockers were enclosed (above) so the King’s advertisement is likely to have been for this experimental machine which with a top speed of 105mph as a fully road equipped machine would have been quite impressive!

Wednesday, September 29, 2010

Ice White Brutale!



MV Agusta have announced that their Brutale 990R will be available in a brand new colour , ice white, but only 5 will be coming to the UK. The 144bhp (1090RR), the Brutale is one of the most powerful naked streetbikes available!
Ride safe

Jon Booth
Email: webmaster@inter-bike.co.uk
Blog: http://bestmotorstyle2011.blogspot.com//
Swicki: http://motorcycling-swicki.eurekster.com/

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Fog Lights

Have you ever cycled in a dense fog?

For the past couple of days, we have been surrounded by this stunning, surreal landscape. There is no distinction between sky and ocean. The dunes, grasses and rosehip bushes are wrapped in a milky whiteness. There is a tornado warning in effect, but for now everything is eerily calm.

To watch someone approaching through the fog from a distance has always fascinated me.  It looks as if the person is coming from nowhere, or from the sky.

I took the opportunity to see how Graham's lights would perform in these conditions, and they were fairly well visible - even at slow speeds.

The lights on my Rivendell Sam Hillborne are powered by a Shimano Alfine hub.

The headlight is a Busch & Müller Lumotec IQ LED Cyo Senso Plus, and its performance is stunning. The beam is not just powerful, but surprisingly large - so that cycling in the dark feels as if there is always a street light on. There is a standlight feature (the light remains on for a few minutes after the bicycle stops), as well as a "senso" feature, whereby the light turns itself on and off depending on how dark it is.

The tail light is a Busch & Müller 4D-lite Plus, which has classic looks, 4 LEDs, and the same standlight feature as the headlight (though the Co-Habitant thinks the standlight on this one is not sufficiently bright).

An additional feature of this tail light is that it is surrounded by a metal cage, which prevents the light from being damaged when it is bumped. This is very useful when the bicycle is dragged through doors and left at bike racks.

I am confident that others can see me in the fog with the light set-up I have on this bicycle. Seeing the road, however, is another matter. What do randonneurs do in these situations? I cannot imagine that any bicycle light can really be strong enough to act as a true fog light in the daytime.

1932 Norton M40 Internationals - For Sale

As advertised on the Car and Classic website.


Quoting the seller: "Norton International Model 40, racing specification, delivered in 1932 to Hans Soenius from Cologne. He then was the best the best German road racer and he raced the bike in 1932 and 1933 before he joined NSU as a works rider. Matching frame (46538) and engine numbers (1594). The frame was modified to rear suspension at one point. The black and white photo above shows Hans Soenius on this Inter in 1933. Priced at 15.700 GBP"


and another one from the same seller: "Norton International, Model 40, engine no.1596, sold in 1932 to C.J.Hands from Birmingham in racing specification. The frame is not original and probably left the works part of a CJ, CS1 or ES2. The girder fork is correct for 1932. Front brake with cooling rings, drum is original. Priced at 12.400 GBP"

Both bikes are in the Czech Republic.

Tuesday, September 28, 2010

Bennett's 1925 TT Norton again

By Roger


I have found a picture (above) of Bennett and his Norton at the end of the 1925 TT which shows the braced Webbs that he used in the race. I wanted to confirm that he did use the braced ones as I had read elsewhere that they were so still that they caused frame breakages on the sidecar outfits. I am most interested in the design as the brace appears to be in line with the fork's front tube rather than midway between as on the Druids. I think that the 1925 TT was the first time that braced Webbs were used and this may also be true for the Druids because of comments in The Motor Cycle; developments tended to be "shared".

Lovely Dress Guards Give-Away

To brighten up your Fall, I am giving away these fantastic, colourful Dutch dress guards, which I reviewed here earlier.

To receive the dress guards, please ask your bicycle - yes, your bicycle - to post a comment here explaining why he or she would like them. A link to pictures of the bicycle is a plus (but please no nudity). My Dutch bike, Linda, will then decide which she likes best and will announce the recipient on Friday.

Comments by humans will be disregarded; bicycles only please. Multiple bicycles belonging to the same owner are eligible. Have fun, and thank you for reading Lovely Bicycle!

Monday, September 27, 2010

Max's 1931 Model 20 Norton

An email from Mike Slater


"Thought you might be interested in this pic; this is my great uncle Max's bike, pictured in 1939 (at least the license plate makes it pretty easy to date the photo). I don't really know much about the bike, apart from the fact that it seems to be a Model 20, with what looks like an aftermarket suicide shifter fitted and the tool box removed."

JdK: It's a 1931 Model 20 Norton. Note the twinport exhaust, the position of the magdyno behind the cylinder, the Enfield hub at rear, the Horton hub at front and the early Norton forks (without the typical Webb wing nuts). An interesting feature is the instrument panel mounted on the front forks. The gearbox lever for the Sturmey Archer box is original, as is most of the rest of the bike.

Do You Cycle When You're Sick?

Just to make sure that nobody would be envious of my stay on Cape Cod, I went and got sick last week. While normal people catch cold, get over it, and go on with their lives, for me illness tends to be "epic". So lately my world has consisted of watching the ocean wistfully while bundled up on the porch, drinking endless hot fluids and medications, working on my laptop, and very minimal cycling to town and back. My bicycle looks at me with scorn, as if to say "How could you!" Which brings me to the question: Do you cycle when you are sick?

Previously I would have answered "yes", but staying here makes me realise that it partly depends on the bike as well. I have a relatively easy time riding an upright bicycle slowly while feeling unwell, but am finding it almost impossible to ride a roadbike in that state. Not only is the speed more than my lungs can handle, but I also have trouble with balance and coordination. On my upright bikes this is not an issue, since their position is almost identical to sitting in a chair and the loop frame is easy to mount and dismount. I am starting to really miss my Gazelle - imagining her, in my hallucinatory state, as a Dutch nurse feeding me spoonfuls of medicine and wrapping me in folksy-patterned quilts.

Sunday, September 26, 2010

It's a Gale indicator!

By Roger


Here is an answer to the question posed in the blog on 29 June. Despite the detailed description I am still not quite sure why it would be needed. Normally indicator diagrams are used to determine power output but this one seems to require a dynamometer to verify it! At least we know what it is and that once again I have proved to be wrong - my motto is: often in error but never in doubt. The other snippets are also of interest as they show that in 1926 crash helmet design was quite advanced and chromium plating was being advocated.

JdK"...I still don't know what this thing does exactly!"

Twelve men and a Norton

The following amusing clipping was sent by Roger...

Saturday, September 25, 2010

Car Talk... Recollections of a Wilted Romance

Here is a confession: I feel guilty about my car - or rather, what used to be my car.

My poor car, once so beloved! I received it as a gift from my family six years ago, after I earned my doctorate and was about to start a new job in a mountainous region of Northern New England. It was the most lavish gift I have received in my life by far, either before or since, and I was filled with gratitude and disbelief. The car was beautiful and impeccably tasteful and rugged, and my excitement knew no bounds. The exterior was a lovely shade of dark gray and the interior was beige suede (I still remember the texture and smell of the seats when the car was new). The 4WD, the optional manual mode, and the myriad of safety features would keep me protected on the treacherous terrain of the place I was to live (and commute for over 20 miles to work). I named the car, and loved it as if it were a puppy. And I delighted in my long commutes - through the valleys past idyllic farm scenes and along dangerous mountain cliffs through the clouds of thick fog that would rise in the mornings. 

Everybody was relieved at my reaction to the car, because I had never been an enthusiastic driver in my previous attempts at car ownership. By my early twenties I had dispensed with cars altogether, living in urban areas where they weren't necessary. Interestingly, this was viewed by many as a lack of self-sufficiency on my part: By living in cities, not practicing driving, and allowing my already questionable motoring skills to deteriorate, I was making myself dependent on urban comforts and public transportation. This new job in a rural area demanded a re-adjustment.

My romance with the new car lasted into winter... until I got into a horrifying accident involving darkness, black ice, fresh snow, a cliff and a railing - into which I crashed head-on after losing control on a turn. Miraculously, I emerged unscathed. And though the front end of the car was totaled, my insurance company came through wonderfully and soon the car was good as new. According to the policemen on the scene, that stretch of the road was so bad that night, that "there was nothing anyone could have done different, except not be out on the road". Not an option of course, when commuting home from a long workday.

I cannot say that I began to dislike or fear cars after this event; it was nothing so dramatic or definite. And I continued to drive throughout that winter and the next, in the same dangerous snow and ice, with no further mishaps. But I no longer thought of my car anthropomorphically, no longer considered it cute. It had become just a thing - a necessary thing, but a dangerous one, too, as well as a stuffy and oppressive one at times. Somehow I no longer saw the charm in the beige suede interior or the beauty of the tasteful gray exterior. It was just a car - something that made sense to use only when the necessity outweighed the danger and the feeling of stuffiness, but not otherwise. It was an excellent car, to be sure - useful especially in rural areas, and great for hauling things in its roomy interior. But just a car.

Several years after I got married, we moved to Boston. Within a week, we decided that the Co-Habitant would sell his car and mine would be shared. This was in no way driven by "ideology" on our part; it was simply absurdly inconvenient to have two cars in Boston, and since his was larger than mine, it was the one to go.

When the decision was made to share my car, I hardly suspected that I would never drive it again, but that is exactly what happened. I have not been behind the wheel of it or any other motor vehicle since sometime in 2007, over three years ago now. I have no idea why, and it was never my intention to categorically stop driving. But soon I found that I would rather walk to my destination for an hour than drive there (which was exactly what I did before I started cycling). What used to be my car now pretty much belongs to the Co-Habitant; I experience no feelings of possession when I look at it or sit in the passenger's seat while traveling together.

Will I drive again? Realistically speaking, I probably will, though I don't know when that might be. I am not "anti-car" and consider cars to be useful and necessary in many circumstances. But I cannot imagine wanting to drive just for the sake of it, or loving a car in the same way as I do my bicycles.

Friday, September 24, 2010

Making an Ordinary Vintage Roadbike Extraordinary (a Review of Sorts)

The Co-Habitant's roadbike, Myles, is a 1976 Motobecane Super Mirage, which he acquired in Spring 2009 and has been gradually updating with modern components and personal touches. It is his only roadbike, and he has cycled somewhere between 2,000 and 2,500 miles on it through its various iterations. I wanted to write a review of it (from my perspective), because I think it poignantly illustrates some aspects of owning and customising a vintage roadbike.

It is always interesting to observe people's reaction to Myles, for he is a real head turner - even more so than my Rivendell. The silver frame, the hammered fenders, the wealth of brown tones in the leather and twine, the frame pump looking almost like a double top tube, and the classic Carradice bag, somehow combine to create a whole that is more magnificent and eye-catching than the sum of its parts.

On closer inspection, those who know bicycles typically exhibit one of two reactions. Some are delighted to see a good, ordinary vintage bicycle salvaged and turned into a thing of beauty. Others are bewildered that we bothered to so elaborately refurbish something so commonplace, rather than searching for a frame with a more impressive pedigree. While the Motobecane Super Mirage was a good, solid bicycle in its time, it was decidedly middle-tier and for that reason unremarkable. The frame is hi-ten steel, the lugs are fairly basic, and the original components (Suntour, Weinmann) are pretty good, but not excellent.

We do not disagree with the point of view that a better frame would have been more deserving of all the DIY lavished on Myles. But sometimes a bicycle just evolves organically, and such was the case here.

When the Co-Habitant found the bike, used and somewhat abused, the plan was simply to ride it after a few minor changes. He first replaced the tires, after the original ones blew up on his very first ride.  He has ridden these Continental Gatorskins (27" x 32mm) the entire time without incident.

He then replaced the original vinyl saddle with a Brooks Flyer. Early on, he was caught in the rain and the Flyer got wet - which hastened its breaking-in process nicely.

The brakes on the bicycle worked fine after some adjustment, but he did replace the pads with the salmon Kool-Stops.

As he began riding the bicycle more and more, he added fenders and a saddle bag. Although I am normally not a fan of hammered Honjos, I think they do look good on silver bikes - providing textural variation where the colour is similar.  Hammered fenders are also a good investment in terms of hiding dents or scratches.

The Carradice Barley bag has been sufficient for carrying anything he needed on this bike, up to our current trip. For the future, he will consider getting a larger bag that can fit laptops, and a rack to support it. Having a saddlebag is also handy for installing a battery-operated tail light, such as his CatEye.

His headlight is mounted on the fork, using a Minoura light mount. While he prefers generator lighting, as far as battery-operated lights go, he likes this system very much.

Some months later, he decided to replace the handlebar set-up, as the original one caused discomfort and difficulty operating the brake levers.  He replaced them with 42cm Nitto Noodle bars, which he loves, and the stem with a Nitto Technomic. 

The original non-aero brake levers were replaced with modern Shimano aero brake levers. Personally, I am not a fan of these brake levers, as the hoods have a rather harsh surface and there is a plastic insert that is very easy to damage. The Co-Habitant has dropped and crashed this bike several times, and you can see that the levers look battered.

Almost a year later, a few more changes were made. After complaining that his feet always slipped on the touring pedals at high speeds and that toe clips were a bother, he installed these SPD clipless pedals - much to my shock at the time.  He loves them and now says that he would not go back to non-clipless on a roadbike, vintage or not.

Around the same time, he also installed a CatEye computer to keep track of his speed and mileage,

a Topeak frame pump,

and two bottle cages, bolted onto the frame - into which he places his twined and shellacked Klean Kanteen bottles.

And the final update - completed just a couple of weeks ago in our yard  - was the replacement of the original stem shifters with these Shimano bar-ends. Since the bike is a 10-speed, it isn't possible to get indexed shifting, but these work just as well in friction mode. After having used a shifting method that sounded like a tractor for over a year, the Co-Habitant is absolutely delighted with these - they are fast and quiet, and he is convinced that they are superior even to my Silver shifters (although I disagree).

And so that is the story of Myles's slow but steady transformation from a plain '70s French 10-speed to a glorious and shamelessly eccentric dandy. Was it worth it? It certainly helped the Co-Habitant learn about classic roadbikes - both riding them and working on them. It is difficult to get a straight answer from him about how comfortable the bike is, especially as he is more tolerant of discomfort and pain than I am and to some degree even thinks these are "normal" to experience on a roadbike. But from what I can surmise, the bike is more or less comfortable in its current state, except that it places a bit too much weight on the hands and is over-responsive to the point of being "squirrely". Also, the frame size would ideally be larger, and he could do with better gearing.

All of these comments, however, are made only in response to my direct questioning; he never complains about the bike on his own accord. On the contrary, he is extremely fond of Myles, smiling and shaking his head quietly at any suggestion that such components ought to be placed on a new frame instead.

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