Home > Airhead > Custom > Siebenrock > Siebenrock Engine >

Big Bore Kit to 1070cc - BMW R100 9/1980 on / Siebenrock
1100082,R80 piston kit ,R80G/S piston kit ,R80GS piston kit ,R80R piston kit ,R80RT piston kit ,R80 Monlever piston kit ,R80ST piston kit,R80 upgrade to 1000cc,R80G/S upgrade to 1000cc,R80GS upgrade to 1000cc,R80R upgrade to 1000cc,R80RT upgrade to 1000cc
 
Alternative Views:


Part #: PistonKit1100

NOTE: This is a special order item. Please allow 1-3 weeks for delivery.

Plug & Play 1070 cc displacement Big Bore Kit.

“Piston capacity can only be replaced by even more piston capacity” – this was the adopted motto during the Siebenrock's-internal development of the Big Bore Kit. The goal of this construction was to enhance the motor characteristics which were already outstanding thanks to the Power and Replacement Kits. They did it and the result for all BMW 1000 cc models from 1981 on-wards 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.
This performance boost was achieved using 151 millimeter long, high-stability connecting rods which, when weight-optimized and fitted with ARP screws, only put 450 grams on the scales. Quite apart from this, 98 millimeter, weight-optimized pistons are used which only weigh 428 grams including the rings, bolts and clips. 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 except the crankshaft bearings, see CSBearing460 if you need to replace them.
See preview of Siebenrock Expert Opinion on Modification and Installation Instructions here.

Vehicle Manufacturer: BMW
Application: BMW Airhead Models
Make/Model: BMW
R100 up to 84, R100CS, R100RS, R100RT Mono from 87, R100GS 87-96, R100R 91-95
Model Years: 09/1980 - 3/1994
Manufacturer #: 1101100 Siebenrock

Brand :
EME Price $2,999.99
BUY NOW $2,825.00

Part #: PISTONKIT1100


Connecting Rod Bearing Shells:
Crank Shaft Bearing Shell Set - BMW Airhead; 11 24 1 258 460 / Glyco (4) [Add $49.99]

Quantity:  
Description
 
See related products below:




Related Products
Push Rod Seal 14mm ID - BMW Airheads to 08/1975 ; 11 32 1 250 267 / EnDuraLast Crank Shaft Bearing Shell Set - BMW Airhead; 11 24 1 258 460 / Glyco Piston Gudgeon Pin Snap Ring Set of two 1.5mm - BMW Airhead; 07 11 9 934 460 / EnDuraLast Valve Cover Gasket Silicone - BMW Airhead; 11 12 1 338 426  / EnDuraLast
EME Price $3.99

Add
EME Price $49.99

Add
EME Price $5.99

Add
EME Price $9.99

Add
11267,11 32 1 250 267,11321250267,R50 cylinder push rod seal,R60 cylinder push rod seal,R75 cylinder push rod seal,R90 cylinder push rod seal,R50 push rod seal,R60 push rod seal,R75 push rod seal,R90 push rod seal 11 25 1 256 477,11251256477,R45 crankshaft bearing,R50 crankshaft bearing,R60 crankshaft bearing,R65 crankshaft bearing,R75 crankshaft bearing,R80 crankshaft bearing,R90 crankshaft bearing,R100 crankshaft bearing,connecting rod 07 11 9 934 460,07119934460,R45 piston snap ring,R50 piston snap ring,R60 piston snap ring,R65 piston snap ring,R75 piston snap ring,R90 piston snap ring,R45 gudgeon pin snap ring,R50 gudgeon pin snap ring,R60 gudgeon pin snap ring,R65 gudgeon pin snap ri S410068015001,11 12 1 338 426,11121338426,valve cover gasket,valve cover,valve gasket set,bmw valve cover gasket,airhead valve cover gasket,R24 valve cover gasket,R25 valve cover gasket,R26 valve cover gasket,R27 valve cover gasket,R45 valve cover gasket,
Valve Cover - BMW Airhead; 11 12 1 250 240 / Siebenrock
EME Price $59.00

Add
11 12 1 250 240,11121250240,11 12 1 263 761,11121263761,11 12 1 262 250.11121262250,valve cover,peanut valve cover,bonehead valve,bmw valve cover,airhead valve cover, valve cover bmw r100, valve cover bmw r45, valve cover bmw r50, valve cover bmw r60, val