Category Archives: Motorcycles

About BMW Airhead motorcycles.

Digitizing slides

Micro Nikkor to the rescue.

I have some old Kodachrome slides I wanted to digitize, but my Canon and Nikon dedicated film scanners were sold long ago. My first attempt was using an Epson 2450 flat bed scanner with transillumination and a dedicated film holder. The result was awful.

An alternative method suggested itself, using my 55mm Micro Nikkor macro lens, an optic of exceptional performance in the close-up range, fitted to a Panasonic GX7 MFT body using an inexpensive adapter. The Nikkor goes down to 1/2 life size on a full frame body, but down to life-size on MFT. Nice, as the 35mm slide will exactly fill the MFT sensor in 3:2 mode.

Here’s the setup:

An iPad is used as an illumination source/light-box. After experimenting I found that 2 sheets of wax paper (from the kitchen) had to be used between the slide and the iPad, otherwise the latter’s pixels would show. Parallelism is a piece of cake – just align the camera until all four sides of the opening in the slide mount are parallel to the frame in the finder or on the LCD screen. Here’s the rear view:

Even with the LCD blurred you can see that the slide is correctly aligned. The screen magnification function in the GX7 is used to establish critical focus with the MF Nikkor, as easy as it gets.

Exposure on a very solid tripod and head was made using the electronic shutter of the GX7 which is truly vibrationless. I made five exposures at one stop intervals, thinking that HDR merging might help. The Nikkor was set at f/8, its sweet spot.

The original slide has exceptionally high contrast and HDR merging did nothing to improve matters. So after importing the best image from the GX7 into LR I dropped it into PS CS5 and messed about with curves and exposure, not to mention the magic lasso on the faces, coming up with something half decent.


The original slide photographed with the GX7 and Micro-Nikkor.


The massaged image after some time in Photoshop.

That photograph was taken on June 16, 1990 in lovely Encino, Los Angeles, when the original owner (left, above) of my BMW R90/6 motorcycle delivered it to me upon sale. I continue to ride it to this day! Other than the top case and some better shocks, it remains pretty much stock, right down to the mechanical points ignition which is as reliable as a hammer. The difference between this machine and modern bikes is that the latter will be useless junk 25 years hence when replacements for failed electronics are no longer available, whereas the R90 – whose electronic content is zero – will be happily soldiering along, hopefully with my son riding it. Oh! and I should add, modern BMW machine are ugly rubbish. This is how a motorcycle should look:


My 1975 R90/6 airhead twin in Scottsdale at my home, snapped the other day.

The bike runs as well as it did 28 years ago and no, I do not miss slide film or film of any kind, for that matter. How on earth did we exist before digital?

Film image: Olympus Stylus Quartz. Digital: Panasonic GX7.

Open House at MotoGhost

For two wheeled BMW men.

Omar Sayied, the owner of MotoGhost is not only a fine mechanic, he is also an astute businessman, putting his MBA to good use in running a successful business. That business caters to BMW motorcyclists who either own older machines in need of repair, ones which the factory dealers long ago abandoned, or newer motorcycles where the often outrageous dealer pricing is to be avoided. Omar ministers to my two airheads (BMW bikes with air cooled two cylinder motors and shaft drive, last made in 1995) when specialty tools or specialty expertise reside outside my garage.

Today saw the MotoGhost Open House and some one hundred machines were already there when I pulled up at noon, eagerly searching out the free bratwursts! Needless to add, I was one of the youngest riders there. Honest!

I rode my 1994 R100RT, a fully faired machine perfect for the 16 mile freeway trek north, the motor humming along happily at 70mph and 4000rpm in fifth gear. This is very much the sweetspot for the 1000cc shaft driven, air cooled twin, with vibes at a minimum and everything as it should be. The machine has been trouble free and its relaxed seating position and big fairing make for fine long distance touring, pannier bags and top case attached.

There was a broad variety of machines to be enjoyed:



MotoGhost is in north Phoenix, off exit 26 from the 101.


The showroom is small and pristine.


Entente cordiale.


My 1994 R100RT in the foreground. The aftermarket rear monoshock is by Progressive Suspension. 60 horsepower – all you need for day long touring.


Enjoying the free eats.


Ouch!


Parts, parts, parts.


Specialty tools do not come cheap. Not available at Harbor Freight ….


Vacuum gauge for carburettor adjustment.


Parts carousels in the workshop.


Alles in ordnung! Tools arranged just so.


Recent vintage machines in the workshop. The R1200R in the forefront is a nice ride.


An early 1970s R60/5. Note the drum front brakes. Larger capacity machines of the era sported a single disc brake in front.


Basket case. Cheaper to buy a good used bike ….


A lovely 1975 R90S, the first modern ‘superbike’.


A 1991 K100RS with a four cylinder, 16 valve motor. Lots of power …. and the personality of a washing machine. 95 buzzy horses, this one. ABS brakes are a nice touch


A late 1970s R100RS, the first motorcycle with a wind tunnel fairing, designed by Hans Muth. A machine much loved by autobahn cops.


Modern BMWs have grown along with American waistlines.


A Russian Ural with sidecar. The Russians stole the airhead engine design from BMW after WW2, and it’s hard to blame them. The quality of these machines is execrable, as you might expect.


A nicely restored 500cc R50 of the 1960s. Not really enough power for modern freeway speeds, and with marginal brakes, this machine nonetheless exudes period charm. The sprung saddles complement the near non-existent rear suspension. Badly in need of pinstripes!


Sidecar rig, this one with a 750cc R75/6 motor.


My 1994 R100RT backed by a modern R1200RT, a compact and surprisingly light tourer, with an oil and air cooled 8-valve boxer engine and almost twice the power at 109hp.


So, now you know.


If you are a Phoenix area resident, MotoGhost is unreservedly recommended for your two wheeled BMW needs.

All snaps on the Panny GX7 with the 12-35mm pro zoom; the interior images all at the f/2.8 maximum aperture.

Williams, AZ

Not half bad.

Having last ridden here in 1992 on the old bike, my 1975 BMW R90/6, some 460 miles from my home in Encino in the San Fernando Valley of Los Angeles, I recall arriving well and truly broken. The hot spa at the motel helped!

This time the ride was less onerous on a machine better protected from the elements, my pristine 1994 R100RT, although anyone riding the 40 miles from Sedona to Williams on I17 will learn how truly atrocious is the state of repair of our interstates. Posted for 75mph it was all I could do to hold on to the handlebars at 65.

Williams is the last town to be bypassed by Interstate 40, and is now a minor tourist mecca. It’s the self proclaimed ‘gateway to the Grand Canyon’ but there’s lots of ’50s Americana to be found here and that is a ton of fun.

The town has awoken to the nostalgia craze and it’s impossible to avoid the ‘Route 66’ signs everywhere, 66 being the mother road from Santa Monica to Chicago before Ike commissioned the freeways.


These are everywhere. Absent when I last visited.


Rod’s is still there, with the rather concerned looking bull having moved from Main Street to the side street. Mercifully I can now afford better.


This bizarre used car dealer has a bunch of trashed 80s Mercedes and no one to sell one to you.


Googie architecture lives!


BNSF.


Perfection Automotive


White trash central.


My hotel, the oldest in Arizona dating from 1891. My ride at left.


Bypassed.


Bankrupted storefront nicely decorated.


Small town America.


Car wash.


My hotel on Route 66. Rates have changed ….


Hotel lobby replete with currency, sadly dominated by Chairman Mao as is the town.


Tireflator.


Do the math. Gas is cheaper today.


The Red Raven restaurant. Four Stars, which is three more than any other place in Williams.


Outside my hotel. Just like Central Park.


My room was in the Carriage House, a separate building in the back. Just lovely.

Panny GX7, kit zoom, with the last snap on the iPhone6.

The Welder

A master craftsman at work.

One of the perils of moving is breakage and it’s something which invariably seems to find my 1975 BMW motorcycle the victim. This time it was the center stand tang, which is a small steel protrusion used to deploy and stow the centerstand.

Given a choice between using the side stand, easily deployed, and the center stand, almost as easy with these light, well balanced machines, most riders will opt for the latter as it’s more stable and prevents oil dribbling down past the piston rings into the head, avoiding a smoky, polluting start. On hot asphalt the center stand distributes the load over a far larger area, and once you have seen your machine gently tip over as the asphalt gives way, you will understand. Don’t ask, the pain – now 20 years old – remains.

The protruding tang, then, makes it easy for the seated rider to deploy the center stand to its down position, whereupon he dismounts, puts his foot on the big plate you see below, and gently rocks the 500 lbs. of German alloys and steels onto the center stand. While I was away when my machine was delivered to Scottsdale, evidently the mover used the tang as a load bearing point, placing a foot on it while rocking the machine back. Snap!


The tang, snapped off.

A call to the mobile welding shop saw Jeff the owner and Donny the welder turn up with their beautiful Miller MIG portable welding rig. We take welds for granted yet our world could not exist without them. Every vehicle, fence, gate, door – you name it – is replete with them. The process used here, MIG or Metal Inert Gas welding, is exactly what it says. The welding torch feeds a line of steel through its tip whose burning gases expel oxygen at the point of contact making for a properly melted junction, free of impurities which would threaten integrity.

While Jeff is a Harley man, which is the default for most riders here in AZ where helmets are not mandated (testimony to the contents between most Harley riders’ ears) Donny the welder turned out be a BMW man himself, which makes for a better weld!


The fire of the sun. Way to go, Donny! Not a good idea to stare at this arc too long.

I learned a lot from Donny about tuning motors and shared with him my passion for the old BMW airhead twins. A good time was had by all and now I can again easily deploy and retract my center stand from the seat.


The job completed, new paint applied.

iPhone6 snaps.

Tech Day

With the Airheads..

I have long been an Airhead, meaning a devotee of air cooled BMW motorcycles, a design last manufactured in 1995 but dating from 1923. Derived from an aircraft engine, air cooling was a natural and the longevity of the design is reflected in the unusually long life expectancy of the motor. Indeed, the BMW blue and white quadrant logo is an abstract representation of an aircraft propeller turning against an azure sky.

I have owned mine since 1990, the second owner, and you can read more of that experience here.

Most major US cities have at least one expert mechanic devoted to airheads and in Phoenix that man is named Dave Alquist. (The factory, criminally, wants nothing to do with its heritage. How many of the pigs cutting you off in traffic in their BMW cars even know of that heritage?). After getting his contact information from the Airheads club I dropped by with my carburetors, sorely in need of an overhaul after 60,000 miles untouched. Dave, who has been working on airheads some three decades, immediately puts one at ease with his gentle charm and boyish enthusiasm for the marque. It did not take much time to know that that this was the right man to entrust with my work.

As luck would have it Dave was holding a tech day this past weekend, a free session during which machines are brought in by their owners for free surgery and advice, overseen by Dave and others like minded. Use of the several motorcycle lifts is free, tools are generally provided by the owners as the kit which came with the machine is sufficient for almost any task, and the abundant coffee and snacks on hand are happily paid for by an unsolicited donation in the adjacent jar. The day started at 8am but much exchange of war stories was called for first, so much so that the first wrench was not wielded with intent until mid-morning! Here are some snaps from the day, one of quite extraordinary friendship and satisfaction from watching experts at work:


A small part of Dave’s very large shop.


Alloy wheel on the truing stand. Welding gear below. Extensive use of alloys keeps these machines delightfully light and easy handling.


A 1951 R25 single. Pretty as a picture, but the modest 12 horsepower won’t take you anywhere fast.


Crankshafts galore.


Earles forks on a 1960s R60/2, an early anti-dive technology.


Dave Alquist checks the owner’s work on replacing the cam chain in this R100GS off-road machine.


Inserting the linking circlip for the cam chain is a tricky job, owing to the narrow clearances.


Rick (at right) contemplates gas tank removal on his 1968 R69US. The top end valve job will be the first since this machine left the factory almost a half-century ago. The number of computer components in these machines is precisely zero.


Chet Gandy, a former aircraft technician, rebuilt this R100RT from a basket case.


Chet (right) checks on the rear drive shaft boot. He has restyled the bike as a café racer.


Roy helps Rick get that gas tank off. A two minute procedure on later machines, this took 30 minutes ….


A beater to your eyes, but this R80/7 has been a reliable daily companion for 325,000 miles.

All snaps on the Panny GX7 with the kit zoom, mostly at ISO1600.