BMW R 1150 RT Repair Manual

11.56
11 25 000 Installing piston
e Attention:
Always install piston and cylinder as a matched pair.
Do not mix up pistons and piston pins.
•
Turn oil scraper ring so that gap (arrow) is at top.
•
Install piston rings with gaps offset by 120°.
Assembly position X = installation toward exhaust
side
e Attention:
Make sure that retaining rings are properly seated
on piston pin.
Oil the friction faces.
Always use pistons of the same weight class in any
one engine.
Markings: ..................................................... + or—
(a 11.11)
Piston size identification:
On piston crown A, B, AB (for either A or B cylinder),
and on cylinder A, B.
R21110060
X

BMW R 1150 RT Specifications

General

Displacement	1130 cc
Transmission	5-speed
Final Drive	Shaft
Bore x Stroke	101 mm x 70.5 mm
Compression Ratio	10.3:1
ABS	Optional
Engine Type	Air/oil-cooled, four-stroke, Boxer twin
Power	95 hp at 7, 250 rpm
Torque	100 Nm at 5, 500 rpm
Dry Weight	259 kg
Front Suspension	Telelever
Rear Suspension	Paralever
Front Brakes	Dual disc
Rear Brakes	Single disc
Wheelbase	1485 mm (58.5 in)