The BMW R60 /5

A classic BMW motorcycle
By Richard Backus
July/August 2010
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BMW R60/5
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BMW R60 /5
Years produced: 1970-1973
Claimed power: 46hp @ 6,600rpm
Top speed: 102mph
Engine type: 599cc air-cooled OHV opposed twin
Transmission: 4-speed 
Weight: 440lb (wet)
MPG: 45-50
Price then: $1,548 (1970)
Price now: $1,500-$3,500

It seems incredible now, but in the mid-1960s, BMW came close to abandoning motorcycle production completely. Motorcycles were suddenly becoming a losing proposition, so BMW decided to focus on developing its more profitable automobile business, a move that in time revived the company’s finances: It also meant that the BMW motorcycle range got somewhat neglected.

The then-contemporary BMW R60/2 was badly outclassed in power and handling by Italian, British and Japanese bikes. The sportier BMW R69S was available with lighter telescopic forks and a few more horses, but it was still pretty sluggish. Both bikes retained such anachronisms as a DC generator, 6-volt electrics and magneto ignition. If BMW was to continue building motorcycles, a radical change was needed. Fortunately, what the company came up became a classic BMW motorcycle - the BMW R60 /5.

New designer, new designs for the BMW R60 /5
In 1964, BMW made the decision to stay in the motorcycle business, and lured Hans-Günther von der Marwitz away from Porsche. It was his job to design the new bikes, which would be built at Spandau, near Berlin, instead of Munich. The Slash 5 series (R50/5, R60/5 and R75/5 of 500, 600 and 750cc) was announced for the 1970 season, and represented a revolution in BMW motorcycle design. Though the flat-twin BMW boxer engine layout remained, just about everything else was new.

In the engine, a new forged 1-piece crank with bolt-on flywheels replaced the old built-up, roller-bearing shaft, and used connecting rods borrowed from the 2.8-liter 6-cylinder car engine. The camshaft, formerly above the crankshaft and gear-driven, was moved below the crank and was now chain-driven. Iron-lined light alloy cylinder barrels replaced the previous cast iron types and were capped with redesigned cylinder heads fed by standard slide-type Bings on the R60 and R50 models. Other improvements included an alternator-powered 12-volt electrical system with an electric starter, though the kickstart was retained.

A much lighter tubular steel frame featured a large-diameter backbone and duplex tubes with the drive shaft built into the right side of the rear swingarm. Twin Boge rear spring/shock units were adjustable for preload with a simple hand lever. A Sachs telescopic fork of BMW design replaced the Earles fork at the front end. Light alloy wheel rims were attached to alloy hubs with a twin-leading-shoe, 7.3-inch drum front brake and similar sized single-leading-shoe drum rear.

In a bid to keep the bikes trim, BMW put considerable effort into weight reduction with extensive use of light alloy and a much lighter flywheel for the single-plate clutch. The overall effect was a machine that, at a little over 400 pounds dry, was much less bulky than the /2, had more power (46hp for the R60/5 versus just 32hp for the R60/2), handled extremely well and had better clearance thanks to the cylinders being farther away from the ground.

Period reviews
In its November 1970 test of a 1971 BMW R60 /5, Cycle magazine said that the new R60 seemed to be built to the same high quality and precision of previous BMW motorcycles.

Cycle’s tester appreciated the new bike’s increase in power, noting that it allowed the new BMW a much higher cruising speed and far livelier acceleration. Some care was needed to get the bike rolling, thanks to the combination of an aggressive clutch and a tall first gear. Similarly, the new engine needed to see 4,200rpm to get into its power band, whereas the old engine pulled strongly from 2,500rpm. That meant more gear shifting to keep the bike in its power band, causing the reviewer to wonder why BMW hadn’t used a 5-speed. There was much praise for the bike’s improved handling, although the tester noted that torque reaction from the engine could make the bike unstable at low speeds. The twin-leading-shoe front brake was also considered only just adequate, especially as the R60 was well equipped for two-up riding, with a large seat and substantial handrail.

The biggest problem testers experienced was stiction in the front fork, and the problem wasn’t properly fixed until BMW introduced a revised fork valve system for 1973. Along the way, there had been only minor changes to the /5 range, suggesting BMW got it pretty much right first time. For the 1972 season, the /5 appeared with a smaller gas tank with chrome side panels, then and forever after known as the “toaster” tank.

Later changes
During the 1973 season, a longer swingarm appeared on the /5, and while many speculated this might have been the result of handling issues, there’s no real evidence of this. Most likely, it was in anticipation of the /6 models due to be introduced the following year.

Either way, the longer wheelbase certainly didn’t hurt straight-line stability, and also allowed fitment of a larger battery and a longer seat. Along the way, the /5 earned an unapproachable reputation for reliability, and was considered at least as durable as the previous /2. Many /5s have since covered hundreds of thousands of miles with only routine servicing.

All in all, the R60/5 is an ideal useable classic. Decent power, predictable handling, excellent build quality and rock-solid dependability make it a bike you can ride regularly with confidence. Simple construction and excellent parts availability make /5s easy to keep on the road, and a large and enthusiastic community of BMW owners is always ready to help you keep your Teutonic steed running. MC

Cops’ Bad Boy: 1969-1971 Moto Guzzi V7 Ambassador
Our police forces are pretty demanding of the bikes they ride: They have to be tough, reliable, comfortable and capable of very high mileages. With the passing of Indian in the 1950s, H-D had the game to itself, though enterprising importers like the Berliner brothers were always on the lookout for a suitable overseas candidate for this big market.

The story goes that the Berliner Motor Corp. shipped two Harley police bikes to Italy seeking interest — one to Ducati (which resulted in the 4-cylinder Apollo prototype) and one to Moto Guzzi.

Guzzi had long supplied the Italian police with single-cylinder Falcones, and just happened to be working on a new police bike based around a 700cc V-twin engine. This became the 50hp V7, first imported into the U.S. and shown to police departments in 1967. “More power,” was the response, leading to the 60hp, 757cc Moto Guzzi V7 Ambassador, which, with its successor the 850 Eldorado, quickly became a cop favorite.

The basic plot has now become almost vernacular for Guzzisti, but was quite a shock for U.S. Italophiles familiar with tiny single-cylinder Ducatis and Morinis. The muscular air-cooled OHV 90-degree V-twin engine was arranged longitudinally with a large flywheel behind and belt-driven generator above. A high camshaft minimized pushrod length, and pistons moved in chrome-lined alloy cylinders fed by dual 29mm Dell’Orto carburetors. The flywheel carried a ring gear for the electric starter (no kickstart was fitted!) and a twin-plate dry clutch. The 4-speed transmission spun a final-drive shaft inside the right-side swingarm to a hypoid drive in the rear wheel.

The drivetrain nestled in a strong duplex cradle frame with a Harley-size telescopic fork and ran on 4 x 18 inch wheels front and rear. A twin-leading-shoe front brake and single-leading-shoe drum rear provided stopping power. Both left- and right-side shift options were available. Civilian riders of the day quickly recognized the touring potential of the big Guzzi, and many hit the road fitted with barn door-size windshields, touring bags and sissy bars.

Road Rider magazine took a new Ambassador on a 6,000-mile road trip and came back very impressed with the bike’s handling, braking and ability to cruise all day at or above highway speeds. There were some minor niggles about the weak horn and flimsy switchgear, and the tester experienced false neutrals in the notchy gearbox, concluding that the transmission was the bike’s weakest point. Otherwise, they concluded, “It’s a beauty, well made, heavy-duty, durable, all but maintenance free.” Based on the number still on the road today, they were right. Like the BMW, the Guzzi is a robust and reliable machine capable of high miles and regular use. Parts are readily available, and their simple construction makes them easy to keep running.


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Post a comment below.

 

Tony Bower
9/17/2012 11:23:59 AM
I rode one around Australia in 1976 (about 20,000 miles), two up with my girlfriend. All up with us and gear the bike weighed about 900 lbs, which made it seriously underpowered for passing cars on two lane roads. I bought it with 30,000 miles on it and sold it at 60,000 miles for about the same money. It was very reliable and comfortable on bitumen and dirt roads if you could go fast enough over the corrugations. I had one big get off on a sandy track where my technique of "keep accelerating in sand to keep the front wheel light" finally came unstuck with a massive tank slapper that spat me, my girlfriend and most of the luggage off the bike. After that, I modified my sand riding tactics to include paddling. A good bike - I really wanted 75/5 for the extra power, but couldn't find one at the time. Next bike was an R90S, which solved the power issue. I've still got it with 90,000 miles on the clock and needing a re-build.

AL LOVITZ
6/28/2012 6:43:40 PM
When I lived in Germany in the early '70's BMW introduced the /5 bikes. As it turned out, I lived in an upstairs apartment with a BMW Motorcycle dealership downstairs. When the /5 came out, I dropped by the dealership to take a look. Needless to say, I bought a new 750/5. I rode that bike all over Europe. One of the most memorable trips was to Nurburgring for the "Elephant" gathering in the middle of winter. To my amazement, there were riders/bikes from all over Europe at the meet. For a few Deutchmarks, one could ride around the race course. Frankly, my wife and I were so cold, we left the meet rather early and went home. Getting back to the bike, the comments in the article were right on the mark - it was comfortable, reliable, and ran very well. At the time, German highway police rode R50's, and could they ride! I do remember that the cost of my new ride was around $1800 out the door. Upon my return to the States, I sold the bike for more than I had paid for it. A year or so later, I bought a new BMW R90/5, which was a continuation of the R75/5. Both were outstanding rides.








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