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Aermacchi 250 CRTT

The CR/CRTT Harley Sprint



In 1961 Harley started importing Aermacchi bikes in hopes of making a in the small bore market was growing in the USA at the time. Remember, Yamaha, Suzuki and Kawasaki had started making in-roads on the V twin Harley, and HD didn’t to be left out of a potentially lucrative segment, the small light oriented motorcycle.

The Aermachhi 250 was to be one of the more successful Italian that Harley brought in the 20 or so years it owned Aermacchi, a pretty good record in the and power department, unlike Italian bikes of the time.

The Sprint series utilized a disposed cylinder configuration Honda 90) with an over camshaft, and two large valves. The 250 grow to a 350cc configuration in by punching out the cylinder, and giving it a ….

1966 Sprint set up for what looks like

The Sprint was a nice sedate bike, and some were for dual-purpose duties. But the Sprint going to concentrate on is the Sprint CR, the that started off many track champions on the road to the circle.

You didn’t purchase a Sprint as a complete motorcycle. When you to the Harley dealer and plunked your hard earned all you got was an American Made DT frame, forks, alloy racing (without tires ) with a gas solo seat and rear thrown in. And depending on what of the year you ordered your CR, you might have to wait for a to be assembled and shipped from the factory in Italy, with Davidson stamped on the side

Differing top ends to the two different configurations. Look at the size of big end on the crank! Gigantic. Ran on needle too.

Aermacchi produced two motor for the CR/CRTT Sprint. The first were undersquare, at 66 x72mm and produced from 1961 to The second generation CR/CRTT used a “short rod” that made the motor with a bore and … of 72 used a dry clutch, Bendix Magneto and was available with 4 or 5 gearboxes.

1963 Longrod about 35 hp @ 9,000 rpm. the dinky carb.

The shortrod could spin up to 10,500 and was a better motor for road or longer dirt tracks, the longrod motor did better on to 1/8th mile ovals. motors had to be de-tuned to run on a 1/8th track, as they had radical and high compression pistons.

Aermacchi 250 CRTT

The bikes started out with 27mm Del Orto carbs, a rubber mounted remote (vibration maybe?) but tuners who ran the understood that the motor take a much larger even 1 3.8th inch GP road racing carbs fitted to the 250 with great It was quite a strong motor which offered the rider a lot of in tuning the bike to his own specs.

Romero on his CR

Gene Romero, Markle, Carroll Resweber and Joe all started on the Sprint CR/CRTT tracker, and it even won the Daytona 100 race in 1963 at the hands of Hammer. Now these guys had racing names if you ask me.

A kit bike from 1963 in its configuration. Notice the DT rigid 200 lbs wet.

The last Harley sprint rolled out of the Aeramacchi in 1973 replaced by the two-… and MX 250 bikes. By 1974 Harley Aeramacchi to the Castogolgni Brothers, who Cagiva from the ashes of

A barely used 1970 ERS. One out of 102 units made by the for racing. Rare stuff. the lump on the right side for the magneto.

So when you think of those chrome festooned Italian of the early sixties, don’t the ones that won races, and some of the greatest riders of all

The Aermacchi/Harley CR CRTT.

Aermacchi 250 CRTT
Aermacchi 250 CRTT
Aermacchi 250 CRTT


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