Genuine ROTAX Parts

B – Loctite 243
C – Loctite 648
L – Klueber Isoflex Topas Nb5051
O – Engine Oil
P – Loctite 5910

a – marked with S/N; 
b – Only for model 2 and 4; 
c – Tolerance group "C" 1.820 - 1.829 mm;
d – Tolerance group "D" 1.830 - 1.839 mm; 
e – Depending on configuration use 14 studs P/N 840752 M8x201 or 8 studs M8x201 and 6 studs P/N 840754 m8x210;
f – See Overhaul Manual of the respective engine type, current issue;
g – Only for use with new cylinders 913221 with countersunk. With the cylinder 913225 the countersunk was already introduced starting from beginning of the production;
h – See the following Service Instruction current issue SI-914-021.

B – Loctite 243
C – Loctite 648
L – Klueber Isoflex Topas Nb5051
O – Engine Oil
P – Loctite 5910

a – marked with S/N;
b – Only for model 2 and 4;
c – Tolerance group "C" 1.820 - 1.829 mm;
d – Tolerance group "D" 1.830 - 1.839 mm;
e – Depending on configuration use 14 studs P/N 840752 M8x201 or 8 studs M8x201 and 6 studs P/N 840754 m8x210;
f – See Overhaul Manual of the respective engine type, current issue;
g – Only for use with new cylinders 913221 with countersunk. With the cylinder 913225 the countersunk was already introduced starting from beginnng of the production;
h – See the following Service Instruction current issue SI-914-021;
i – Without O-Ring from S/N 06.0010 to 07.5000, 2x O-Ring starting with S/N 07.5001;
j – 431570 introduced as per engine S/N as follows: 912 UL S/N 06,770.893, 912 ULS S/N 06,781.191, 914 UL S/N 07,682.596;
k – Wrench size A/F 11

B – Loctite 243
C – Loctite 648
L – Klueber Isoflex Topas Nb5051
O – Engine Oil
P – Loctite 5910

a – Only for model 2 and 4;
b – Tolerance group "C" 1.820 - 1.829 mm;
c – Tolerance group "C" 1.830 - 1.839 mm;
d – See Overhaul Manual of the respective engine type, current issue

F – Loctite 7063
L – Klueber Isoflex Topas Nb5051
O – Engine Oil
Z – Loctite 603

e – At 912 ULS the complete  piston with rings has to be exchanged up to S/N 4,425.123;
f – With countersunk for O-ring 830415. 912 UL: 4,403.679, 912 ULS: Starting with serial production, 914 UL: 4,417.868;
g – Note following Service Letter: SL-912-002 current issue, SL-914-002 current issue,
h – With expanded space of sprag clutch. Introduced as per following engine S/N 912 UL: 4,409.089, 912 ULS: 5,650.835, 914 UL: 6,772.727;
i - Balanced pistons set: max. difference 3 g

C – Loctite 638
L – Klueber Isoflex Topas Nb5051
O – Engine Oil

AR – As required

a – For cylinder 2 and 3;
b – For cylinder 1 and 4;
c – Up to engine S/N 912 UL: 4,401.879, 914 UL: 4,417.597, single valve springs and double valve springs if required are allowed to be mounted in one engine;  
d – From engine S/N 912 UL: 4,401.880, 914 UL: 4,417.598;
e – With sintered bronze bushing;
f – Oversize +0.2 mm (0.008 in.);
g – Rocker arm version with vespel bushing, from engine S/N 912 UL: 4,404.621, 912 ULS: 4,427.487, 914 UL: 4,418.104;
h – For inlet valve, chafe up to new measurement;
i –  For outlet valve, chafe up to new measurement;
j – Use only once!;
k – For rework of exhaust port. See Overhaul Manual of the respective engine type, current issue;
l – Marked with S/N;
m – Without worm gear;
n – Prefilled, 8 parts per set;
o – Cylinder heads where the coolant temperature is measured.
p – see SI-914-30

Positions 6-8 are non-certified parts.

a – See also Service Bulletin SB-912-028 / SB-914-016 current issue

C – Loctite 648
E – Loctite Anti-Seize 15378

a – Certified part;
b – 360° anular ring (torus-shaped)