1070 cc for all R 100 from 1981
"Piston capacity can only be replaced by even more piston capacity" - this is motto of the Big Bore Kit 1070 cc for all R100 models from 1981.
The goal of this construction was to enhance the motor characteristics which were already outstanding thanks to the Power and Replacement kits.
They didn't just say this, they went out and did it and the result for all 1000 cc models from 1981 onwards was the 1070 cc Big Bore Kit, which turned out to be the ultimate solution for sporty touring riders. After modification, an amazing 80 hp is available at an engine torque of 92Nm.
That's what we call a convincing result.
This performance boost was achieved using 151 millimetre long, high-stability connecting rods which, when weight-optimized and with ARP screws, only put 450 grams on the scales.
Quite apart from this, 98 millimetre, weight-optimized pistons are used which only weigh 428 grams including the rings, bolts and clips and the asymmetrical camshaft.
Thanks to the well-designed piston form, it is not necessary to adapt the cylinder head to the big bore.
All of the parts required to mount the kit are included within the scope of delivery.
The use of dual ignition is strongly recommended!!!!!!
For BMW R50/5 R60/5 R75/5 R60/6 R75/6 R90/6 R90S R60/7 R75/7 R80/7 R80RT R100/7 R100S R100RS R100RT R100CS R45 R65 R65LS R65GS R80G/S R80ST
Paralever Modelle R80GS R100GS R80PD R100PD R80R R100R R100Mystik R80Basic
Monolever Modelle R65 R80 R80RT R100RS R100RT
Gasschieber 60/1, Nadel K4, Zerstäuber 265 AB, Hauptdüse 152,
Leerlaufdüse 60, Pumpendüse 50, Nadelventil 300, Schwimmer 8,5gr.