| Motor Tuning BN1-BN2 |  |
ZK1AH/BN1-ALU | aluminum cylinder head
Type: BN1, BN2 required quantities: 1 |
ZK1AH/BN1-AR | fast road 4 cyl. aluminum head
optimized combustion chamber, channels + high valve
Type: BN1, BN2 required quantities: 1 |
ZK1AH/BN1-FR | full race 4 cyl. aluminum head,
the same as ZK1AH/BN1-AR, but optimized for motorsport
Type: BN1, BN2 required quantities: 1 |
MD2AH/BN1R | competition steel head gasket
3 layer
Type: BN1, BN2 required quantities: 1 |
ZK17AH/BN1R | steel rocker pedestal & spacer
set
Type: BN1, BN2 required quantities: 1 |
ZK19aTR6R | washer 7/16“ , high tensile
Type: BN1, BN2 required quantities: 11 |
ZK23AH/44.5
| inlet valve std size - comp.
(44.5 mm)
Type: BN1, BN2 required quantities: 4 |
ZK23AH/46 | inlet valve large - comp. (46
mm)
Type: BN1, BN2 required quantities: 4 |
ZK25AH/39.7 | exhaust valve std. comp. (39.7
mm)
Type: BN1, BN2 required quantities: 4 |
ZK25AH/41 | exhaust valve large - comp.
(41 mm)
Type: BN1, BN2 required quantities: 4 |
M25AH/R | steel flywheel 8ORG holes
Type: BN1, BN2 required quantities: 1 |
ZK27AH/BN1-B | valve guide inlet bronze
Type: BN1, BN2 required quantities: 4 |
ZK28AH/BN1-B | valve guide outlet bronze
Type: BN1, BN2 required quantities: 4 |
ZK30AH/BN1-HD* | heawy duty valve springs 4 cyl.,
for camshaft to 7,2 mm stroke

Type: BN1, BN2 required quantities: 1 |
ZK30AH/BN1-R* | valve spring set - competition,
for camshaft from 7,2 mm stroke

Type: BN1, BN2 required quantities: 1 |
ZK32AH | valve-cap for ZK30AH/BN1-HD /
ZK30AH/BN1-R
Type: BN1, BN2 required quantities: 8 |
M35AH/BN1R | competition head studs & nuts
cyl. head
Type: BN1, BN2 required quantities: 1 |
ZK38AH/BN1R | roller rocker kit
Type: BN1, BN2 required quantities: 1 |
ZK51AH/BN1 | valve cap alu polished
Type: BN1, BN2 required quantities: 1 |
M100AH/BN1 | alu oil pan
Type: BN1, BN2 required quantities: 1 |
M200AH/BN1 | aluminium back plate
Type: BN1, BN2 required quantities: 1 |
M200AH/BN1S | aluminium back plate to suit
BN4 bellhousing
Type: BN1, BN2 required quantities: 1 |
M220AH/BN1-R | valve push rod
Type: BN1, BN2 required quantities: 8 |
M221AH/BN1R | cam followers - modified
Type: BN1, BN2 required quantities: 8 |
M303AH/BN1R | pistons 10,5:1 / 88 mm
Type: BN1, BN2 required quantities: 1 |
M314AH/BN1R | steel con rod 100/s type
Type: BN1, BN2 required quantities: 1 |
M314AH/BN1R-K | steel rod set-for steel crank
Type: BN1, BN2 required quantities: 1 |
M501AH/R | adjustable timing gear
camshaft
Type: BN1, BN2 required quantities: 1 |
M511AH/BN1R | steel crankshaft
Type: BN1, BN2 required quantities: 1 |
| Hight performance camshaft | |
M280AH/BN1 | 280° hight performance
camshaft, timing: 37/67-73/27 stroke: 7,15mm – for road
engines
Type: BN1, BN2 required quantities: 1 |
M290AH/BN1 | 290° hight performance
camshaft timing: 42/73-78/32 stroke: 7,84 mm – for good
optimized engines + competition
Type: BN1, BN2 required quantities: 1 |
M300AH/BN1 | 300° hight performance
camshaft, timing: 47/73-83/37, stroke: 8,22mm cam lift –
for round courses
Type: BN1, BN2 required quantities: 1 |
M338AH/BN1-LM | camshaft „Le-Mans“, timing:
24/64-59/29, stroke: 6,40 mm (0.252“)
Type: BN1, BN2 required quantities: 1 |