Monday, October 29, 2018

Royal Enfield close ratio gearbox

Here's something for the hardcore Enfield nerds out there. Recently I managed to pick up a spare gearbox for my Enfield twin race bike (the early postwar type with the clutch operating on a scroll mechanism) in order to rob the kick start mechanism from it. The 500 twin racer is bump start only: I have it registered on the road and, quite honestly, having to run and jump on to it to start the beast is an absolute pain in the a***. I live on a hill and the very last thing you want to have to do after spending some workshop time on a bike is to find it is not running after having gotten to the bottom of aforementioned incline.

On dismantling the box fitted to the bike I got something of a surprise. Whereas I had expected just the kick start shaft to be missing (obvious as it is blanked off) I found that there is no provision for a kicker at all - the gear on the layshaft is not cut for a kickstart pawl. What's more it is a close ratio set that raises first, second and third. I've swapped the close ratios out for a pair of gears with kickstart pawl but time will tell if I miss the close ratios and regret the change....

Delving inside the Enfield twin's gearbox this is what I found.
Close ratios and no provision for a kickstart at all.

The HCR code denotes a 1953 box. Many thanks to Graham
Scarth, chairman of the Royal Enfield Owners Club for
identifying.

Here's the inner cover with gearbox shaft blanked off. It's a
neat job and with the close ratios and lack of machining for
the kickstart pawl I wonder if it is a factory part?

And here is the donor gearbox with regular ratios and kickstart.

Friday, October 26, 2018

Bikes I have owned part III. BMW R100R

Instantly recognisable head on view. Iconic
is a hugely over-used word but an airhead
Beemer merits it.

The third in an occasional series of self indulgent nostalgia trips...

In my enduring quest to find the perfect airhead BMW I decided upon trying the very last one, the R100R. I had until then owned an R65 (an excellent bike that I bought with an RS fairing fitted, I later removed the fairing and the bike looked a lot nicer but performance in every aspect was worst..) Then an unfaired R80, pretty good but not one to greatly inspire. Next up to come my way was the R100R.

The R100R was introduced to mollify the hardcore of old school beardy BMW riders who had been mightily upset when the airheads were dropped in favour of the new K Series flying bricks. The 100R was in essence a GS in roadster clothing. Overall the package was excellent, an old school engine in up to date running gear. Brembo brakes, Showa suspension and paralever swinging arm.

Handsome, even in nineties purple.

Nowadays the 100R is seen as being ahead of its time in the retro market. Not only that it was something of a pre-cursor to the super moto scene - in being a big torquey motor in a naked bike with nimble frame geometry borrowed from an off-roader and excellent brakes.

The 100R pushed out 60bhp, 10 less than an RS but considerably better on torque and it had great fun point and squirt characteristics. In fact on a twisty road it was as fast as anything out there. Now I remember the bike and write about it I kinda want another one...

Personally I found the downfall of the 100R to be its low gearing. As the bike was a parts bin model with most borrowed from the GS range BMW did not bother to go to the expense of changing the gearing to be more suitable for a purely road orientated machine. This was the reason I sold it in the end - I had wanted a motorway cruiser to back up my classic bikes but the 100R was way too buzzy for a big bike when pushed along at motorway speeds.

Definitely fond memories of this machine though and one I would recommend to anyone (unless motorway stonking is your thing..)

Essentially an R100GS in road clothing.

A great gentle backroads tourer.

Retro style valve covers. Chrome on aluminium never looks
anything but naff though and is a corrosion magnet.

Purple! At least it looks better than the vile aquamarine that
they also offered as a colour option.

Friday, October 19, 2018

Late vintage Scott

A rather lovely late vintage Scott. I'm not familiar with the nuances of specs between different models of Scotts of the period. I feel fairly certain though that this particular machine is a three speed model from 1929 or 1930. Perhaps there is a Scott guru out there who can enlighten? 

Late vintage Scott three speeder.

Monday, October 8, 2018

The Great Dorset Steam Fair 2018 pt4

It was now well over a month ago but here are the last few pictures from this year's GDSF. Here's to hoping I am at home for it again next year...

In the military vehicles section a Kettenkrad.

I've always been a bit curious as to how the steering works on
a Kettenkrad. If you think about it the front wheel is completely
superfluous as by itself it has no hope at all of persuading the
contraption around any corners. Look closer and you steer the
'krad with foot operated brakes on the left and right tracks. These
brakes have linkages to the handlebars, so turn the handlebars and
as well as the front wheel moving the relevant track brake is also
applied. So, begs the question why they bothered with a front
wheel and handlebars at all? Presumably it was to give feel and
familiarity to the driving experience for soldiers well used to
motorcycles but completely unfamiliar with tanks.

Air cooled Royal Enfield stationary engine.

Close up and you can see a use of elaborate alloy
castings that is typical of Royal Enfield and a result
of their in-house foundry.

These guys brought along a whole old school belt driven
machine shop. What an undertaking for a few days of display.
I take my hat off to them when I consider how much effort just
moving my Le Blond lathe in to my workshop was!

More of that portable machine shop.

In the fairground area the Ken Fox Wall of Death display
brought in the crowds.

Nelson Brothers 'Little Jumbo' Type T c1925 from Massachussets
USA. 1 3/4 hp.

Funnels, funnels, funnels.

Pulling along a gert big load of chains.

And a gert big tanker!

Driver's seat.

Road man's wheels and home.

Tuesday, October 2, 2018

c1990 Watsonian Sidecars brochure

Watsonian's brochure from 1990. They might be undergoing something of a renaissance at the moment but 30 odd years ago sidecar sales were very much in a trough and to all intents and purposes Watsonian was the last man standing of the once illustrious British sidecar manufacturing industry.





Tuesday, September 25, 2018

1999 Buell M2 Cyclone

Not too sure you could call it handsome but the Buell Cyclone
has a definite style and presence.

A new toy. Yes, the saving up to buy a pioneer motorcycle fund is not going so well. However a redistribution of motorcycles within the shed is being plotted so perhaps I will be riding a veteran in events next season.... In the meantime here is a machine I have lusted after for a good long while. I decided to make the jump as Buells seem to be going up in value at the moment, that's not because I've bought it as an 'inv***ment' rather that there is no way I could be persuaded to part with hard earned cash if they cost much more than they do now....

Firstly I will say that I haven't had many opportunities yet to ride this fine machine but I already love it. It delivers absolute, raw motorcycling thrills. Think about it, there are not many traditional in line v twin pushrod engined sports motorcycles out there. What else, Moto Morinis? or hush... Vincents.

The feel of the Buell is in fact very much like a development of a British classic. That is to say, it vibrates a lot, has very pronounced character and delivers power with definite pulses. And it does have quite a lot of power, some 95 horses of them, not massive by sportsbike standards but they are of the shire horse variety. Most importantly it is a wildly fun machine to ride and can deliver a lot of thrills at speeds that don't risk an instant ban on the license.

It's a bit like a less cuddly version of a Ducati Monster.

Like any limited production machine developed on a low budget the Cyclone has quirks. Firstly the engine is solid. It's a Harley Sportster so is, you can say, very well proven. Of course it is pushing out considerably more power than a standard Sportster but it is still fairly Bullet proof. The frame is simple and good. Buells are known to be good handlers, to give this one the benefit of the doubt I would say that it needs new tyres. It is a short, high bike with a sharp steering angle so the handling is not immediately familiar but undoubtedly it can hustle through the bends. The trademark Buell suspension unit under the engine does really seem like obstinate engineering for the sake of it: it raises the, already heavy, engine slightly too high up when a set of twin shocks would have done the job equally well and kept mass low down.

Gear linkage - an abomination.

Some of the fittings are of lovely quality and some are frankly awful. The front brake is excellent. Apparently Eric Buell is not a believer in using a rear brake and subsequently the rear is pretty feeble.

The gear change lever is an absolute abomination of pressed steel. Admittedly the design is led by the location of the Sportster gear shaft but surely cast alloy and rose joints should have been considered. On the subject of gripes, what were they ever thinking of putting the ignition key between the cylinder heads where it slowly cooks for that Sportster motor does indeed run pretty hot. 

Note the slow roasted ignition key barrel.

Buells tend to come with a very definite image. Maybe it is because they have a Harley motor and were sold through Harley dealers. As a consequence you do see a number of them around with dodgy flame paint schemes. That is why I like this example, it is black - the colour a motorcycle should be. There is not a lot of baggage that comes with a plain black motorcycle. It has a certain menace and danger as a motorcycle should but it is not aligning with any particular tribe.

Rear brake, very poor.

Overall I feel like I shall be boring friends and acquaintances extolling the virtues of Buell motorcycles for a while to come. I'm looking forward to putting some decent miles in on the bike and already thinking about how I can get it to haul some luggage for long trips abroad. More to come...

Front brake, excellent.

'Screaming Eagle' air cleaner is an ugly and will
have to go. Mind, the original Buell 'bread bin'
air filter was a shocker too. Currently on the hunt
for an eye pleasing and functional alternative.

Friday, September 21, 2018

The Millenium wheel truing jig

I had been looking for a decent wheel truing jig for a while when this one turned up in the autojumble area of the Dorset Steam Fair. You see a few for sale but they are heavy old things and no-one really wants to post them. I had to carry this one from one side of the rally field to another and that ten minute hike seemed quite gruelling..

I'm a sucker for vintage tools and workshop equipment, more so if they are in cast iron and the Millenium is a doozy. All the fittings are there and the patina is nice, better still is that it is actually a solid decent and useful tool. I've got a couple of wheels to build up and true and with any luck this Brown Brothers product will serve me well. The cherry on top is the cardboard tag with a little bit of the personal history of the jig noted in ink in fine handwriting and dating from 1958. At a best guess the jig dates from the twenties.