Special Tuning Carburetters |
We could not hope to cover all the SU carburetter specifications, both official and unofficial, that Minis have been fitted with over the years. What we can do though is to acknowledge the factory's own Special Tuning range, which we show here. Space precludes us from listing all the parts for these carburetters, so we have limited ourselves to showing complete carburetter assemblies, linkages, gasket kits, service kits, rebuild kits, sundries kits and a range of more frequently asked for parts. Most other parts are however available on request. |
|
|
|
|
|
Identification of your carburetters is absolutely necessary before ordering parts. It should be a simple matter of looking at the aluminium tag attached to each float chamber lid; the number stamped on the tag should correspond to one of the carburetter part numbers listed here. Failing that, if the tag is missing, a study of the applications below will help. |
|
|
|
|
|
H4 Carburetter Assemblies |
One of Special Tuning's most popular products of the 1960s, the twin H4 (1 1/2") carburetter installation came in four different specifications: right hand drive or left hand drive with choke mechanism and right hand drive or left hand drive with thermo jet (without choke mechanism). The new replacement carburetter assemblies listed here are fitted with AUD1118 CP4 needles (AUD178 carburetters) or AUD1265 MME needles (AUD59 carburetters). Reconditionedcarburetters are available; please contact us for details. |
|
|
|
|
|
The replacement twin H4 installations are faithfully original in appearance. They are supplied with inlet manifold and linkage, or as simply a pair of carburetters (with choke mechanism) or a pair of carburetters with linkage (thermo jet). |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
1 |
FZX3056 |
CARBURETTER INSTALLATION, replacement, H4 |
1 |
RHD; pair of AUD178 carburetters (with choke mechanism) complete with inlet manifold and linkage. |
|
FZX3075 |
CARBURETTER INSTALLATION, replacement, H4 |
1 |
RHD; pair of AUD59 carburetters (thermo jet) complete with inlet manifold and linkage. |
2 |
AUD178T |
CARBURETTERS, pair, replacement, H4 |
1 |
RHD; pair of AUD178 carburetters (with choke mechanism) without inlet manifold or linkage. |
|
AUD59T |
CARBURETTERS, pair, replacement, H4 |
1 |
RHD; pair of AUD59 carburetters (thermo jet) without inlet manifold, but with linkage. |
3 |
AUD178L |
CARBURETTER ASSEMBLY, H4, left hand |
1 |
RHD; with choke mechanism. |
|
AUD176/8R |
CARBURETTER ASSEMBLY, H4, right hand |
1 |
RHD; with choke mechanism. |
|
AUD176L |
CARBURETTER ASSEMBLY, H4, left hand |
1 |
LHD; with choke mechanism. |
|
AUD176/8R |
CARBURETTER ASSEMBLY, H4, right hand |
1 |
LHD; with choke mechanism. |
|
AUD59L |
CARBURETTER ASSEMBLY, H4, left hand |
1 |
RHD, thermo jet. |
|
AUD59R |
CARBURETTER ASSEMBLY, H4, right hand |
1 |
RHD, thermo jet. |
|
AUD165L |
CARBURETTER ASSEMBLY, H4, left hand |
1 |
LHD, thermo jet. |
|
AUD165R |
CARBURETTER ASSEMBLY, H4, right hand |
1 |
LHD, thermo jet. |
Note that for the choke-fitted carburetters, the right hand carburetter is the same for both right hand drive and left hand drive, whereas the left hand carburetter is different (the float chamber changes from left hand mounting on right hand drive cars to right hand mounting on left hand drive cars). |
|
|
|
|
|
H4 Linkage |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
4 |
AUC2431 |
ROD, throttle connecting |
1 |
|
5 |
AUE75 |
COUPLING ASSEMBLY, throttle rod |
2 |
|
6 |
AUE230 |
LEVER ASSEMBLY, throttle rod |
1 |
|
7 |
AUC5062 |
TRUNNION ASS'Y, throttle cable to lever |
1 |
|
8 |
AUE235 |
LEVER ASSEMBLY, throttle return spring |
2 |
|
9 |
AUE92 |
STIRRUP ASS'Y, choke cable to jet levers |
1 |
For AUD178 and AUD176 carburetters. |
10 |
AUE34 |
TRUNNION ASS'Y, choke cable to stirrup |
1 |
For AUD178 and AUD176 carburetters. |
|
|
|
|
|
H4 Gasket, Service, Rebuild and Sundries Kits |
A gasket kit includes manifold gasket, air filter gasket, suction chamber damper washer, float lid gasket, banjo connection washers, jet bearing washers and glands and float chamber hold up washers, for one carburetter. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
11 |
AUE801 |
GASKET KIT, H4, choke mechanism type |
2 |
For AUD178 and AUD176 carburetters. |
|
AUE901 |
GASKET KIT, H4, thermo type |
2 |
For AUD59 and AUD165 carburetters. |
|
|
|
|
|
A service kit includes the gasket kit, plus float chamber needle and seat and jet assembly, for one carburetter. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
12 |
CSK40 |
SERVICE KIT, H4, choke mechanism type |
2 |
For AUD178 and AUD176 carburetters. |
|
CSK42 |
SERVICE KIT, H4, thermo type |
2 |
For AUD59 and AUD165 carburetters. |
|
|
|
|
|
A rebuild kit includes the service kit, plus throttle spindle, throttle spindle bushes, throttle disc, throttle disc screws, jet lever and link fitting hardware (included in CRK205 only), throttle lever tapered pins and float lever pivot pin, for one carburetter. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
13 |
CRK205 |
REBUILD KIT, H4, choke mechanism type |
2 |
For AUD178 and AUD176 carburetters. |
|
CRK206 |
REBUILD KIT, H4, thermo type |
2 |
For AUD59 and AUD165 carburetters. |
|
|
|
|
|
A sundries kit includes suction chamber screws, float lid nut, gland spring, jet return spring, jet adjusting spring, jet sealing ring, jet locking nut, stop screw and spring, pivot bolt, banjo bolt, float lever (both types) and inlet filter, for one carburetter. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
14 |
CSK001 |
SUNDRIES KIT, H type with choke mechanism |
2 |
For AUD178 and AUD176 carburetters. |
|
CSK006 |
SUNDRIES KIT, H type with thermo jet |
2 |
For AUD59 and AUD165 carburetters. |
|
|
|
|
|
H4 Components |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
15 |
AUD9500 |
SUCTION CHAMBER ASSEMBLY |
2 |
|
16 |
AUC2057 |
SCREW, locking needle |
2 |
|
17 |
AUC8114 |
DAMPER, suction chamber |
2 |
|
18 |
AUC4587 |
SPRING, piston, light blue |
2 |
|
19 |
AUD1118 |
NEEDLE, jet, fixed, standard (CP4) |
2 |
For 970cc with 12Ëš BTDC static timing. |
|
AUD1265 |
NEEDLE, jet, fixed, standard (MME) |
2 |
For 1071cc with 7Ëš BTDC static timing. |
|
AUD1067 |
NEEDLE, jet, fixed, standard (BG) |
2 |
For 1275cc with 5Ëš BTDC static timing (C-AEA648 camshaft). |
|
AUD1006 |
NEEDLE, jet, fixed, standard (No. 7) |
2 |
For 1275cc with 2Ëš BTDC static timing (C-AEG510 camshaft). |
20 |
WZX1595 |
JET ASSEMBLY, choke mechanism type |
2 |
For AUD178 and AUD176 carburetters. |
|
AUC8188 |
JET ASSEMBLY, thermo type |
2 |
For AUD59 and AUD165 carburetters. |
21 |
AUC3230 |
BEARING, jet, upper |
2 |
|
22 |
AUC3231 |
BEARING, jet, lower |
2 |
For AUD178 and AUD176 carburetters. |
|
AUC4656 |
BEARING, jet, lower |
2 |
For AUD59 and AUD165 carburetters. |
23 |
WZX1303 |
FLOAT KIT |
2 |
Includes float lid gasket. |
24 |
WZX1101 |
NEEDLE AND SEAT ASS'Y, float chamber |
2 |
Includes float lid gasket. |
25 |
AUC1051 |
TAG, carburetter identification |
2 |
|
AUC1051 is a blank tag; when ordering, please state the carburetter assembly number you require stamped on the tag. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
26 |
WZX987 |
THROTTLE SPINDLE KIT |
2 |
|
A throttle spindle kit includes throttle lever taper pins, throttle disc screws, manifold and air filter gaskets. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
27 |
AUD3080 |
BUSH, throttle spindle |
4 |
|
Note that the throttle spindle bosses on the carburetter body must be reamed to 9.5mm diameter before fitting bushes. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
28 |
WZX1323 |
THROTTLE DISC KIT |
2 |
|
A throttle disc kit includes throttle disc, throttle disc screws, manifold and air filter gaskets. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
29 |
12G2125 |
GASKET, air filter |
2 |
|
30 |
AUC4278 |
GASKET, manifold and insulator |
4 |
|
31 |
LNZ206 |
NUT, nyloc, carburetter to manifold |
4 |
|
32 |
PWZ106 |
WASHER, plain |
4 |
|
|
|
|
|
|
HS4 and HS6 Carburetter Assemblies |
In the 1970s, Special Tuning offered a choice of twin HS4 (1 1/2") or twin HS6 (1 3/4") carburetters for use on 998cc and 1275cc Minis (HS6s were available for 1275cc only). Earlier carburetters were of the fixed needle type and later versions had 'swing' or biased needles. The new replacement HS4 carburetter assemblies listed here are of the biased needle type. No Special Tuning HS4 or HS6 carburetters were manufactured with Capstat temperature compensating jets. Reconditioned carburetters are available; please contact us for details. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
|
FZX3054 |
CARBURETTER INSTALLATION, twin HS4 |
1 |
Includes a pair of AUD640 carburetters, linkage, fuel lines, manifold and heatshield assembly. |
33 |
FZX3050 |
CARBURETTERS, pair, replacement, HS4 |
1 |
Pair of AUD640 carburetters with linkage. |
34 |
AUD224R |
CARBURETTER ASS'Y, HS4, right hand |
1 |
Fixed needle type. |
|
AUD224L |
CARBURETTER ASS'Y, HS4, left hand |
1 |
Fixed needle type. |
|
AUD640R |
CARBURETTER ASS'Y, HS4, right hand |
1 |
Biased needle type. |
|
AUD640L |
CARBURETTER ASS'Y, HS4, left hand |
1 |
Biased needle type. |
|
AUD709R |
CARBURETTER ASS'Y, HS4, right hand |
1 |
Biased needle type. |
|
AUD709L |
CARBURETTER ASS'Y, HS4, left hand |
1 |
Biased needle type. |
|
AUD416R |
CARBURETTER ASS'Y, HS6, right hand |
1 |
Fixed needle type. |
|
AUD416L |
CARBURETTER ASS'Y, HS6, left hand |
1 |
Fixed needle type. |
|
AUD641R |
CARBURETTER ASS'Y, HS6, right hand |
1 |
Biased needle type. |
|
AUD641L |
CARBURETTER ASS'Y, HS6, left hand |
1 |
Biased needle type. |
|
|
|
|
|
HS4 and HS6 Linkage |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
35 |
AUE481 |
ROD, throttle and choke connecting |
2 |
HS4 carburetters. |
|
AUC2439 |
ROD, throttle and choke connecting |
2 |
HS6 carburetters. |
36 |
AUE586 |
LEVER ASSEMBLY, pick up, LH |
2 |
|
37 |
AUE587 |
LEVER ASSEMBLY, pick up, RH |
2 |
|
38 |
AUE180 |
LEVER ASSEMBLY, throttle |
1 |
|
39 |
AUC5062 |
TRUNNION KIT, throttle cable |
1 |
|
40 |
AUE34 |
TRUNNION AND SCREW, choke cable |
1 |
|
|
|
|
|
|
HS4 and HS6 Gasket, Service, Rebuild and Sundries Kits |
A gasket kit includes manifold gasket, air filter gasket, suction chamber damper washer, float lid gasket and jet union washer and seal, for one carburetter. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
41 |
AUE811 |
GASKET KIT, HS4 carburetter |
2 |
For AUD224, AUD640 and AUD709 carburetters. |
|
AUE812 |
GASKET KIT, HS6 carburetter |
2 |
For AUD416 and AUD641 carburetters. |
|
|
|
|
|
The service kit for the Special Tuning HS4 carburetters includes two gasket kits, plus float chamber needles and seats, one each AUD9141 and AUD9142 jets and clips for the jet pick up links, for two carburetters. |
The HS6 service kit includes two gasket kits, plus float chamber needles and seats, jet assemblies and clips for the jet pick up links, for two carburetters. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
42 |
CSK59 |
SERVICE KIT, pair of HS4 carburetters |
1 |
For AUD224, AUD640 and AUD709 carburetters. |
|
CSK55 |
SERVICE KIT, pair of HS6 carburetters |
1 |
For AUD416 and AUD641 carburetters. |
|
|
|
|
|
Each rebuild kit includes the service kit, plus throttle spindles, throttle spindle bushes, throttle discs and throttle disc screws, for two carburetters. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
43 |
CRK254 |
REBUILD KIT, pair of HS4 carburetters |
1 |
For AUD224, AUD640 and AUD709 carburetters. |
|
CRK249 |
REBUILD KIT, pair of HS6 carburetters |
1 |
For AUD416 and AUD641 carburetters. |
|
|
|
|
|
The sundries kit includes choke cam pivot bolt and tubes, suction chamber screws, float lid screws and washers, stop screws and springs, jet nut, jet spring and washer, spindle lock tab and float pivot pin, for one carburetter. |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
44 |
CSK003 |
SUNDRIES KIT, HS type carburetter |
2 |
|
|
|
|
|
|
HS4 and HS6 Components |
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
45 |
AUD9635 |
SUCTION CHAMBER ASSEMBLY |
2 |
For fixed needle HS4 carburetters. |
|
AUD9988 |
SUCTION CHAMBER ASSEMBLY |
2 |
For biased needle HS4 carburetters. |
|
AUD9187 |
SUCTION CHAMBER ASSEMBLY |
2 |
For fixed needle HS6 carburetters. |
|
AUD9999 |
SUCTION CHAMBER ASSEMBLY |
2 |
For biased needle HS6 carburetters. |
46 |
AUC2057 |
SCREW, locking fixed needle |
2 |
Included in HS4 and HS6 fixed needle suction chamber ass'ys. |
|
AUD4251 |
SCREW, locking biased needle |
2 |
Included in HS4 biased needle suction chamber assembly. |
|
AUD4252 |
SCREW, locking biased needle |
2 |
Included in HS6 biased needle suction chamber assembly. |
47 |
AUC8114 |
DAMPER, suction chamber |
2 |
|
48 |
AUC4587 |
SPRING, piston, light blue |
2 |
For HS4 carburetters. |
|
AUC4387 |
SPRING, piston, red |
2 |
For HS6 carburetters. |
49 |
AUD1006 |
NEEDLE, jet, fixed, standard (No. 7) |
2 |
For fixed needle HS4 carburetters. |
|
CUD1015 |
NEEDLE, jet, biased (AAR) |
2 |
For biased needle HS4 carburetters. |
|
AUD1247 |
NEEDLE, jet, fixed, standard (KW) |
2 |
For fixed needle HS6 carburetters. |
|
CUD1151 |
NEEDLE, jet, biased (BCD) |
2 |
For biased needle HS6 carburetters. |
50 |
AUD9102 |
JET ASSEMBLY, RH |
2 |
For HS4 carburetters; black coloured jet body with black identification sleeve. Original specification item. |
|
AUD9141 |
JET ASSEMBLY, RH |
2 |
For HS4 carburetters; black coloured jet body with green identification sleeve. Alternative specification item. |
|
AUD9098 |
JET ASSEMBLY, LH |
2 |
For HS4 carburetters; black coloured jet body with white identification sleeve. Original specification item. |
|
AUD9142 |
JET ASSEMBLY, LH |
2 |
For HS4 carburetters; black coloured jet body with pink identification sleeve. Alternative specification item. |
|
AUD9149 |
JET ASSEMBLY, RH |
2 |
For HS6 carburetters; black coloured jet body with orange identification sleeve. |
|
AUD9148 |
JET ASSEMBLY, LH |
2 |
For HS6 carburetters; black coloured jet body with yellow identification sleeve. |
51 |
WZX1341 |
JET BEARING KIT |
2 |
For fixed needle carburetters. |
|
WZX1340 |
JET BEARING KIT |
2 |
For biased needle carburetters. |
52 |
WZX1300 |
FLOAT KIT |
2 |
Includes float lid gasket. |
53 |
WZX1100 |
NEEDLE AND SEAT ASS'Y, float chamber |
2 |
Includes float lid gasket. |
54 |
AUC1038 |
TAG, carburetter identification |
2 |
|
AUC1038 is a blank tag; when ordering, please state the carburetter assembly number you require stamped on the tag. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
55 |
WZX1177 |
THROTTLE SPINDLE KIT |
2 |
For HS4 carburetters. |
|
WZX1178 |
THROTTLE SPINDLE KIT |
2 |
For HS6 carburetters. |
A throttle spindle kit includes throttle lever taper pins, throttle disc screws, manifold and air filter gaskets. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
56 |
AUD3080 |
BUSH, throttle spindle |
4 |
|
Note that the throttle spindle bosses on the carburetter body must be reamed to 9.5mm diameter before fitting bushes. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
57 |
WZX1323 |
THROTTLE DISC KIT |
2 |
For HS4 carburetters. |
|
WZX1321 |
THROTTLE DISC KIT |
2 |
For HS6 carburetters. |
A throttle disc kit includes throttle disc, throttle disc screws, manifold and air filter gaskets. |
|
|
|
|
|
Ill. No. |
Part No. |
Description |
Qty. Rqd. |
Remarks |
58 |
12G2125 |
GASKET, air filter |
2 |
For HS4 carburetters. |
|
AUC1283 |
GASKET, air filter |
2 |
For HS6 carburetters. |
59 |
AUD2219 |
GASKET, carburetter to manifold |
2 |
For HS4 carburetters. |
|
GUG705561 |
GASKET, carburetter to manifold |
2 |
For HS6 carburetters. |
60 |
LNZ205 |
NUT, nyloc, carburetter to manifold |
4/8 |
Qty. increases for HS6 carburetters. |
61 |
PWZ105 |
WASHER, plain |
4/8 |
Qty. increases for HS6 carburetters. |