\
\
โข;
Service-Information Cr1
Tech.Cus~.Service
VS-2011 kl/Kr/fm
Re: Carburettors
Gentlemen:
Motorcycles R60/6 – R90 S
Group: 13
Munich, June ’74
1/74 (122 M) e
Below please find a list showing the standard carburettors for
our /6 models. This information bulletin replaces the Number
7/73 (090 M) Service Information 11Fuel Preparation and Regulation.
n
CarburettorT ypeB ing,l eft
CarburettorT ypeB ing,r ight
CarburettorT ypeO ellorto, left
with cold start equipment
CarburettorT ypeO ellorto, right
with cold start equipment
CarburettorI .D. 111111
Main jet
Needle jet
Jet needle number
Needle posi hon
Idling jet
Idling air jet
Idling air screw/
Idling mixture regulating screw
opening — turns
By-pass bore 1 mm dia.
By-pass bore 2 mm dia.
Float chamber vent bore
Float valve
Float weight
Starting jet
Starting air jet
Mixturep assage
mm dia.
mm dia.
grams
mm dia,
mm ~ia.
R fJJ/6
1/26/111
1/26/112
26
140
2.68
w/accel. PIIIIIP
4
2
40
1/4-1 1/4
0.8
2.2
10
R 75/6
64/32/9
64/32/10
32
135
โข 2.70
46-241
3
45
1
1/2-1
1.0
2.5
13
60
2.0
Kenntnis genommen – Pris connaissance – Noted – Tornado nota – Presa conoscenza
Betriebsleitung Werkstatt I KD-Annahme , Gewiihrl.-Sachb. Teiledienst
R 90/6
64/32/11
64/32/12
32
150
2.68
46-241
Iยท
45
1
1
0.7
o.65
2.5
13
60
2.0
R 90 S
~M 30 es
PHMJ8 BO
38
155-
2.60
K4
3
fJJ
1.2
1 1/2
1. 4
2 .5
3.0
10
77 46/70
7.0
-2-
Ablage – Archives – File – Archive!
Betriebsleitung i Werkstatt
Air passage
Accel. PU111 โก jet
mm dia.
Fuel vol, injected per stroke cu. cm
– 2 –
R fJJ/6 R 75/6
S.I. 1/74 (122 M) e
R 90/6 R 90 S
6.0
o. 35
0.4
Rotary valve diaohragm 65-810 65-810
Rotary valve weight grams
Emulsionb ores in rotary valve mmd ia.
Intake air filter
Note:
102 106
2.0/1. 2/0. 7 2.0/1. 2/0. 7
Onec ommoโขnm icro-starโข dry-type air filter for both
carburettors.
In order to avoid wear at the R 90 S carburettor throttle cables,
we kindly ask you to check the supply pipes and adjustment screw
and to trim the upper and lower I.D. prior to delivery or when
the motorcycle is next in the shop.
V. ry truly yours,
SCHE MOTORENW ERKE
ktiengesellschaft _
pp. &;:!
{
I……
About the Service Bulletin Archive
Searchable index of BMW service bulletins for repair and parts installation for a variety of 247 models. This is not an exhaustive list. If you have ones to share to help complete the archive, please contact us directly.

