Allens Performance Ltd.

VM28-57 Carb Data Set

MOUNT TYPE Spigot MAIN JET 4/042-Size 170
TICKOVER POSITION Left PILOT JET VM22/210-Size 40
COLD START POSITION Left NEEDLE JET VM30/38 (169) N-8
COLD START TYPE Lever JET NEEDLE 5DP39 Clip groove #3
AIR SCREW POSITION Right STARTER JET Fixed 40
FLANGE PITCH (MM) PILOT AIR JET
CLAMP DIA (MM) PILOT AIR SCREW VM20/214 1 Turns out
FRONT SPIGOT DIAMETER (MM) 35 MAIN AIR JET BS30/97-Size 0.5
REAR SPIGOT DIAMETER (MM) 44 POWER JET
LENGTH (MM) 93 THROTTLE VALVE VM28/56-Size 2.5
HEIGHT OVER BORE CENTRELINE (MM) 81 FLOAT VALVE VM26/26-Size 2.5
HEIGHT UNDER BORE CENTRELINE (MM) 64
FUEL INLET POSITION Left
FLOAT HEIGHT (MM) 15
FUEL SPIGOT (MM) 8

 

1 Dust Cover: Cable Adjuster VM26/46
2 Cable Adjuster M21/14
3 Locknut: Cable Adjuster B30/247
4 Carburettor Top VM26/44
5 Seal: Carburettor Top VM26/57
6 Spring: Throttle Return VM28/257
7 Retaining Plate: Jet Needle VM28/132
8 E Clip: Jet Needle VM18/341
9 Jet Needle #
10 Throttle Valve VM28/56-size
11 Needle Jet VM28/86-size
12 Dust Cover: Cold Start Assy VM20/455
13 Retainer: Cold Start Assy VM20/456
14 Lever: Cold Start Assy VM28/135
15 Indexing Plate VM26/09
16 Spring: Cold Start Assy VM16/42
17 Plunger: Cold Start Assy VM26/116
18 Carburettor Body N/A
19 Gasket: Float Bowl VM28/129
20 Float Bowl Baffle Plate VM28/227
21 Pilot Jet VM22/210-size
22 Pivot: Float Arm BV26/22
23 Float Arm VM28/166
24 Float VM28/164
25 Float Bowl VM28/130
26 Gasket: Float Bowl Drain Screw VM28/134
27 Float Bowl Drain Screw VM28/133
28 Main Air Jet BS30/97-size
29 Pilot Air Screw VM20/214
30 Spring: Pilot Air Screw M12F/46
31 Spring: Tickover Screw M20/11
32 Tickover Screw VM24/224
33 Gasket: Float Valve Assy VM26/25
34 Float Valve Assy VM26/26-size
35 Baffle: Main Jet VM28/228
36 Main Jet 4/042-size
37 Retainer: Vent Hose VM15/164
38 Screw: Float Bowl CW2=0416
39 Cold Start Assy: Knob Type TM24/01
49 Retainer: Floats VM26/42