BMW R 65
BMW R 65 Type 248 (1978–1985)
|Sales description||R 65|
|Production period||1978 to 1985
(with Type 247 to 1993)
|Air-cooled two-cylinder boxer|
|Power (kW / PS )||33 kW (45 PS)
(from 1981 37 kW) at 7250 rpm
|Torque ( N m )||50 Nm
(from 1981 52 Nm)
|Top speed ( km / h)||175|
|Brakes||front disc brake Ø 260 mm,
rear simplex drum brake Ø 200 mm
|Empty weight (kg)||205|
The model from 1985 with an empty weight of 205 kg (full tank) was the lightest motorcycle from BMW, but with a permissible total weight of 440 kg it was suitable for touring. The short-stroke ( bore × stroke : 82 × 61.5 mm) machine already reached a top speed of 147 km / h with 20 kW, the 50 PS version is specified with a top speed of 175 km / h.
At the beginning of the construction period, the R 65 cost 7,290 DM, in 1990 the basic price was 9,850 DM, a year later 10,200 DM.
At the end of the 1970s, the executive suite of BMW motorcycle manufacturers came to the conclusion that the delivery program had to be expanded downwards. It was decided that a new design was necessary to compensate for this shortcoming in the class of motorcycles with displacements of less than 800 cm³. However, this should not deviate too far from the proven original design of the BMW R 75/5 . It can be assumed that BMW has fought hard internally over the equipment and conception, since in the end there should be motorcycles that also expanded the range in terms of price. On the other hand, they certainly did not want to endanger their reputation as a quality manufacturer with a “cheap boxer”.
In 1978, the result was two motorcycles, which were closely related to their predecessors in the BMW range in terms of design, but which in many respects clearly pointed towards the future. The type 248 motorcycles differed from each other only in a few technical details, the different cubic capacities were realized by different sized cylinder bores:
First there was the BMW R 45 , which was offered in two engine variants with 20 kW (27 hp) and 26 kW (35 hp). The weaker variant fit into the then cheaper 27 HP insurance class and was often used by driving schools.
The R 65 was supposed to close the gap left by the R 60/7 . The then chief developer Hans-Günther von der Marwitz answered the question why it lacked five PS with 33 kW (45 PS) to exhaust the 50 PS insurance class at the time with the words "enough".
Technology and facelift
The R 65 is powered by a boxer engine with a displacement of 649.6 cm³ , which generates a nominal output of 33 or 37 kW (45 or 50 hp). The two-cylinder engine has an underlying camshaft that is driven by the crankshaft via a single roller chain. The camshaft actuates the valves via tappets , push rods and rocker arms in the cylinder head - 2 per cylinder.
It has a tubular steel double loop frame . Until 1985 the gross vehicle weight was 398 kg.
At the end of the 1970s, cast aluminum wheels were used for the first time at BMW for the new generation of boxer motorcycles. Weight savings of 0.75 kg at the front and 1.35 kg at the rear were named for the 18-inch wheels. Due to the formation of cracks between the spokes and the front wheel hub, these wheels on the 19 inch R 80 and R 100 models were exchanged for specimens with cast reinforcement at this highly stressed point. However, BMW failed to replace the 18-inch wheels of the R 45 and R 65, which have the same design. In the 50 HP version of the R 65, which could be equipped with a twin-disc brake system as an option, the same loads and corresponding consequences arise.
For the model year 1981 the type 248 was subjected to a facelift and technically revised. This included a reinforced engine housing with improved crankshaft lubrication, Nikasil- coated cylinders, a modified transmission with a lighter clutch, transistor ignition, plate air filter and a ten millimeter longer swing arm. Due to larger valves, the R 65 now had the full 50 hp, the more powerful version of the R 45 was omitted. Then there was the R 65 LS with its controversial design, comparable to the Suzuki Katana , which was also designed by Hans A. Muth, then head of design at BMW-Motorrad. In addition to the small fairing, the lower and narrower handlebars and the matt black painted exhaust system, the LS was equipped with double disc brakes.
1985 saw the end of the Type 248 in the BMW range. The newly introduced exhaust gas values for motorcycles could not be met with the relatively high- compression R-65 engine in its former form. However, it lived on in the R 65 of the type 247 E, which was built until 1993, which was derived from the R 80 with its monolever chassis (only the engine, final ratio and speed of the speedometer differed). In addition, a throttled 20 kW (27 hp) variant with smaller carburettors and less compression was offered - this variant replaced the R 45. The 20 kW drive was also used in the R 65 GS , which was built from 1987 to 1992 .
From 1985 their engine alone was taken over into the "large series" and the "small" frame with two spring struts was withdrawn from service. From then on, the R 65 was equipped with the Boxer Monolever single - sided swing arm .
In this version and with the small cylinder heads of the R 45 and their carburettors, the BMW R 65 now had a reduced output of 20 or 35 kW (27 or 48 hp).
|model||Number of pieces
up to 1985
|R 65 LS||-||6,389|
For 1984 to 1994 BMW named 22,075 copies for the R65 together with the R 80; 8,260 of them were R 65.
- BMW R65 Specifications . BM bikes. Accessed March 2019. (English)
- pressbmwgroup.com, All motorcycles - series models since 1923 (until 2004) (PDF, 1.8 MB) page 30, accessed on March 10, 2019.
- Motorrad Classic 2017/03, On the move with the BMW R 65 LS , accessed on March 10, 2019.
- BMW R65 (45PS) . In: motorcycle . No. 12 , 1978, p. 8 .
- pressbmwgroup.com, All motorcycles - series models since 1923 (until 2004) (PDF, 1.8 MB) pages 29 and 30, accessed on March 12, 2019.
- bimmerarchiv.de, BMW R45 bis 1985, accessed on March 10, 2019 .
- bimmerarchiv.de, BMW R65 up to 1985, accessed on March 10, 2019 .
- pressbmwgroup.com, All motorcycles - series models since 1923 (until 2004) (PDF, 1.8 MB) page 69, accessed on March 10, 2019.
- bimmerarchiv.de, R 65 from 1985 to 1993, accessed on March 11, 2019 .