Allens Performance Ltd.

TM28-1 Data Set

Position Part Number Description
1 CW2=0410 Screw: Carb Top
2 TM29/16 Carburettor Top
3 TM29/17 Gasket: Carb Top
4 739-13001 Screw: Jet Needle Retainer
5 TM29/71 Retainer: Jet Needle
6 VM18/341 E-clip: Jet Needle
7 VM26/315 Washer: Jet Needle
8 J8-##### Jet Needle
9 832-38007-size Throttle Valve
10 TM29/62 Gasket: Carb Body
11 VM34/195 Hose: Vent
12 TM33/32a Carburettor Body: Rear
13 VM38/133 Screw: Carb Body
14 BS30/97-size Pilot Air Jet
15 BS30/97-size Main Air Jet
16 730-07008 Spring: Tickover Screw (TM33-12)
16a N110209 Spring: Tickover Screw (TM28-1)
17 TM33/38a Tickover Screw (TM33-12)
17aa N136038 Tickover Screw (TM28-1)
18 N189169 Holder: Tickover Screw
19 VM30/160 Pivot: Floats
20 859-34003 Floats
21 N133200-size Float Valve Assy
22 VM13/216 Screw: Retains Float Valve Assy
23 KV/10 O-ring: Float Valve Assy
24 VM18/233 Filter: Float Valve Assy
25 TM33/35 Baffle: Main Jet
26 VM38/106 Spacer: Main Jet
27 N100604-size Main Jet
28 VM28/486-size Pilot Jet
29 616-94012 Seal: Float Bowl
30 N133363 Drain Screw
31 TM29/12d Float Bowl
32 888-23043-1F Hose: Overflow
33 C2=0416 Screw: Float Bowl (If flexible idle screw is used.)
34 C2=0414 Screw: Float Bowl
35 N124063 O-ring: Pump Nozzle
36 TM29/24-size Pump Nozzle
37 TM29/14 Seal: Pump Nozzle
38 N138192 Pilot Mixture Screw
39 N138187 Spring: Pilot Mixture Screw
40 VM12/33 Washer: Pilot Mixture Screw
41 N1333037 O-ring: Pilot Mixture Screw
42 888-25029-1E Hose: Vent
43 730-04003a Spring: Pump Piston
44 TM29/18 Piston: Pump
45 N150048 Dust Cover: Pump Rod
46 TM33/46 Pump Rod (TM33-12)
46a VM38/210 Pump Rod (TM28-1)
47 B30/397 Screw: Pump Rocker
48 VM38/212 Pump Rocker
49 TM33/47 Spring: Pump Rocker (TM33-12)
49a TM29/22 Spring: Pump Rocker (TM28-1)
50 N/A Carburettor Body: Front
51 C5=0510 Screw: Throttle Cable Bracket
52 TM33/33 Bracket: Throttle Cable (TM33-12)
52a VM38/197 Bracket: Throttle Cable (TM28-1)
53 TM33/37 Bellcrank/Rollpin/Throttle Shaft Assy (TM33-12)
53a TM29/34 Bellcrank/Rollpin/Throttle Shaft Assy (TM28-1)
54 TM24/21 Spring: Throttle Valve Return (TM33-12)
54a TM29/21 Spring: Throttle Valve Return (TM28-1)
55 B36/95 Thrust Washer: Lifting Arm
56 VM38/186 Lifting Arm
57 W4=05 Washer
58 VM28/230 Screw: Lifting Arm
59 VM33/49c Spring Clip: Throttle Valve Link
60 VM33/45 Throttle Valve Link
61 M10/56 Washer: Throttle Valve Link
62 BSW28/70 E-clip: Throttle Valve Link
63 B40I/10 Washer: Throttle Valve Link
64 TM33/49 Cold Start Assy (TM33-12)
64a TM29/31 Cold Start Assy (TM28-1)
65 N138198 O-ring: Cold Start Assy
66 784-24111-size Needle Jet (TM33-12)
66a 784-24008-size Needle Jet (TM28-1)
MOUNT TYPE Spigot MAIN JET N100604-Size 115
TICKOVER POSITION Top right PILOT JET VM28/486-Size 25
COLD START POSITION Left NEEDLE JET 784-24008-Size (512) P-6
COLD START TYPE Knob JET NEEDLE 5FP96 Clip groove #3
AIR SCREW POSITION STARTER JET Fixed
FLANGE PITCH (MM) PILOT AIR JET Fixed
CLAMP DIA (MM) PILOT MIXTURE SCREW N138192B 1 Turn out
FRONT SPIGOT DIAMETER (MM) 40 (Non concentric) MAIN AIR JET Fixed
REAR SPIGOT DIAMETER (MM) 50 POWER JET
LENGTH (MM) 94 THROTTLE VALVE
HEIGHT OVER BORE CENTRELINE (MM) 117 FLOAT VALVE N133200-Size 2.0
HEIGHT UNDER BORE CENTRELINE (MM) 78 PUMP NOZZLE TM29/24-Size 0.35
FUEL INLET POSITION Left
FLOAT HEIGHT (MM) 14
FUEL SPIGOT (MM) 6