Mikuni Tm40 Tuning Manual



Parts

  1. Mikuni Tm40 Tuning Manual Transfer Switch
  2. Mikuni Carburetor Tuning

We have also included the Mikuni HS40/TM40 tuning manual. Adjusting the idle mixture screw - With the motor fully warmed up (after 10-15 minutes of spirited riding) and the mixture screw 3 turns out from lightly seated. Turn the mixture screw inwards until the idle speed drops slightly. This manual describing the various components and their functional range. There is simply no point in attempting to tune any carburetor unless the engine is completely sound. Valves and rings must seal properly, the ignition timing must be correct and the spark plugs clean and gapped. Some exhaust systems may also make carburetor tuning difficult. If wishing to modify or use your existing Susuki DR650 cables to suit the Mikuni TM40-6 or use a POD filter rather than the original air-box you can purchase the carburetor, tuner jet kit and or what ever other components you want individually by following the directions below.

Mikuni Tm40 Tuning Manual

Mikuni Tm40 Tuning Manual Transfer Switch

Mikuni Tm40 Tuning Manual

Mikuni Carburetor Tuning

TM SERIES FLAT SLIDE NEW STYLE EXPLODED VIEW

Other TM series parts in addition to what is listed below.
1. Complete Starter System, VM28-418 (TM28) VM26/116 002-815
1. Complete Starter System TM32-1, TM34-2, TM36-2, TM38-1 VM29/47 002-816
1. Complete Starter System TM38-3, TM38-85, TM38-86 VM29/47 002-816
1. Complete Starter System TM39 and TM41 Pro Series VM29/47 002-816
2. Nylon Ring TM24-8001 VM24/791A 002-780
2. Nylon Ring TM28, TM32-34 VM28/1046 002-754
2. Nylon Ring TM36-2, TM38-1, TM38-3, VM38/153 002-753
2. Nylon Ring TM38-85, TM38-86, TM39/41 Pro VM38/153 002-753
3. Screw with Lock Washer for Cable Connector TM24-8001 CW2=2608 007-265
3. Screw with Lock Washer for Cable Connector VM28-418 (TM28), TM32-1, TM34-2, CW2=0310 002-752
3. Screw with Lock Washer for Cable Connector TM36-2, TM38-1, TM38-3 CW2=0310 002-752
3. Screw with Lock Washer for Cable Connector TM38-85, TM38-86, TM39/TM41 Pro CW2=0310 002-752 CW2=0310 002-752
4. Cable Connector TM24-8001 VM24/790 002-758
4. Cable Connector TM36-2, TM38-85, TM38-86 VM38/152 002-751
4. Cable Connector TM39 and TM41 Pro Series VM38/152 002-751
5. E-Ring (Needle Clip) All TM Series VM20/369 002-083
6. NEEDLES
7. Throttle valves

TM24 (TM24-8001) 3.0 832-30005 002-951
TM28 (VM28-418) 2.5 832-33001 002-804
TM32 (TM32-1) 4.0 832-39012 (TM32-1 uses same as TM34-2) 002-800
TM34 (TM34-2) 4.0 832-39012 (TM32-1 uses same as TM34-2) 002-800

Old Style TM 36, TM38 Carburetor with Top Idle Adjuster Rod TM36 (TM 36-2), TM38 (TM38-1, TM38 (TM38-3)
2.5 832-43002 002-734
3.0 832-43002 002-735
4.0 832-43002 002-737
5.0 832-43002 002-739

New Style TM 38 Carburetor, with Side Idle Adjuster Screw TM38 (TM38-85), TM38 (TM38-86)
2.5 832-43011 007-401
3.0 832-43011 007-402
3.5 832-43011 007-403
4.0 832-43011 007-404
4.5 832-43011 007-405

8. Idle Rod (TM Carburetors with Top Idle Adjustment) TM36-2, TM38-1, TM38-3 VM38/159 002-732
10. Screw, Jet Block All TM Series VM38/132 002-742
11. Washer All TM Series VM34/274 002-741
12. Jet Block, Left - TM38-1, TM38-3 VM38/144 002-710
13. Jet Block, Right - TM38-1, TM38-3 VM38/145 002-711
14. Float Pin All TM Series BV26/22 002-107
15. Float Arm TM32-1, TM34-2, TM36-2, TM38-1 VM36/15 002-112
15. Float Arm TM38-3, TM38-85, TM38-86 VM36/15 002-112
15. Float Arm TM39 and TM41 Pro Series VM36/15 002-112
16. Cap, Float Guide Pin VM28-418 (TM28), TM32-1, TM34-2 VM26/42 002-718
16. Cap, Float Guide Pin TM36-2, TM38-1, TM38-3 VM26/42 002-718
17. Pilot Jet All TM Series VM22/210
18. Float TM24-8001 VM24/365 007-255
18. Float VM28-418 (TM28) VM28/694 007-726
18. Float TM32-1, TM34-2, TM36-2, TM38-1 VM24/236 002-113
18. Float TM38-3 VM24/236 002-113
18. Float TM38-85, TM38-86, TM39/41 Pro RH 859-52020 002-481
18. Float TM38-85, TM38-86, TM39/41 Pro LH 859-52021 002-482
19. Gasket, Float Chamber TM24-8001 VM20/492 007-250
19. Gasket, Float Chamber VM28-418 (TM28) VM26/228 007-251
19. GASKET, FLOAT CHAMBER TM32-1,TM34-2,TM36-2,TM38-1 VM34/374 002-700
19. GASKET, FLOAT CHAMBER TM38-3, TM38-85, TM38-86 VM34/374 002-700
19. GASKET, FLOAT CHAMBER TM39 and TM41 Pro Series VM34/374 002-700
20. Float Bowl Assembly TM36-2, TM38-1, TM38-3 TM32/02-100 002-701
20. Float Bowl Assembly TM38-85, TM38-86, TM39/41 Pro TM38/138 007-767
21. Plate, Hose Retaining VM28/79A 002-204
22. Screw with Lock Washer TM24-8001 CW2=0416-B 002-615
22. Screw with Lock Washer VM28-418 (TM28) CW2=0416 002-823
22. Screw with Lock Washer TM32-1, TM34-2, CW2=0516 002-373
22. Screw with Lock Washer TM36-2, TM38-1, TM38-3, TM38-85, TM38-86, TM39/41 Pro CW2=0518 002-719
22. Screw with Lock Washer TM38-85, TM38-86, TM39/41 Pro CW2=0518 002-719
23. O-Ring VM28-418 (TM28) VM26/227 002-825
23. O-Ring TM32-1, TM34-2, TM36-2, TM38-1 VM28/254 002-531
23. O-Ring TM38-3, TM38-85, TM38-86 VM28/254 002-531
23. O-Ring TM39 and TM41 Pro Series VM28/254 002-531
24. Drain Plug VM28-418 (TM28) VM28/817 002-827
24. Drain Plug TM32-1, TM34-2, TM36-2, TM38-1 VM28/253 002-526
24. Drain Plug TM38-3, TM38-85, TM38-86 VM28/253 002-526
24. Drain Plug TM39 and TM41 Pro Series VM28/253 002-526
25. Cap, Idle Adjuster TM36-2, TM38-1, TM38-3 VM35/40 002-731
26. Packing (Rubber) TM36-2, TM38-1, TM38-3 N138.077 002-730
27. Nut-TM36-2, TM38-1, TM38-3 N2=04 002-729
28. Idle Adjuster-TM36-2, TM38-1, TM38-3 603-68001 002-728
29. Nut-TM36-2, TM38-1, TM38-3 BDC36/35 002-727
30. Rubber Cap VM18/228 002-723
30. Rubber Cap TM24, VM28-418 (TM28) VM26/46 002-061
30. Rubber Cap TM32-1, TM34-2, TM36-2 VM18/228 002-723
30. Rubber Cap TM38-1, TM38-3 VM18/228 002-723
30. Rubber Cap TM38-85, TM38-86 VM34/282 002-452
31. Screw with Lock Washer All TM Series CW2=0412 002-748
32. Cable Adjuster VM28-418 (TM28) M18F/43A 002-062
32. Cable Adjuster TM32-1, TM34-2, TM36-2, TM38-1 VM36/83 002-724
32. Cable Adjuster TM38-3, TM38-85, TM38-86 VM36/83 002-724
32. Cable Adjuster TM39 and TM41 Pro Series VM36/83 002-724
33. Locknut VM28-418 (TM28) B30/247 002-065
33. Locknut TM32-1, TM34-2, TM36-2, TM38-1 B30/247 002-065
33. Locknut TM38-3, TM38-85, TM38-86 B30/247 002-065
33. Locknut TM39 and TM41 Pro Series B30/247 002-065
34. Mixing Chamber, Top TM24-8001 VM24/785 007-765
34. Mixing Chamber, Top TM36-2, TM38-1, TM38-3 776-19002 002-733
34. Mixing Chamber, Top TM38-85, TM38-86, TM39/41 Pro 776-19001 NA
35. Gasket, Top TM24-8001 VM24/785 007-765
35. Gasket, Top VM28-418 (TM28) VM28/1045 002-830
35. Gasket, Top TM32-1, TM34-2, VM32/495 007-268
35. Gasket, Top TM36-2, TM38-1, TM38-3 VM38/127 002-725
35. Gasket, Top TM38-85, TM38-86, TM39/41 Pro VM38/127 002-725
36. Spring, Throttle valve TM24-8001 730-11003 002-831
36. Spring, Throttle valve VM28-418 (TM28) 730-15021 002-832
36. Spring, Throttle valve TM32-1, TM34-2 730-15004 002-833
36. Spring, Throttle valve TM36-2, TM38-1, TM38-3, 730-16003 002-750
36. Spring, Throttle valve TM38-85, TM38-86, TM39/TM41 Pro 730-16003 002-750
37. Needle Jet TM24-8001 #454 Series Q-0 Needle Jet
37. Needle Jet VM28-418 (TM28) #175 Series P-8 Needle Jet
37. Needle Jet TM32-1, TM34-2, TM36-2 #389 Series Q-2 Needle Jet
37. Needle Jet TM38-1, TM38-3 #389 Series Q-2 Needle Jet
37. Needle Jet TM38-85, TM38-86, TM39/41 Pro #389 Series Q-2 Needle Jet
38. Ring, Main Jet TM24-8001 VM28/449 002-664
38. Ring, Main Jet VM28-418 (TM28) VM28/429 002-836
38. Ring, Main Jet TM32-1, TM34-2, TM36-2, TM38-1, TM38-3 VM34/454 002-837
38. Ring, Main Jet TM38-1, TM38-3 VM34/454 002-837
38. Ring, Main Jet TM38-85, TM38-86, TM39/41 Pro TM34/36 002-835
39. Main Jet All TM Series 4/042
40. O-Ring, Needle Valve TM24-28 VM24/559 002-838
40. O-Ring, Needle Valve TM32-41 KV10 002-709
41. Needle valve 1.5 WITH KV10 O-RING TM24-8001 STD MIKUNI# VM24/557A-1.5 (SKU 002-842)
41. Needle Valve 2.5 with KV10 O-Ring TM28, VM28-418 STD MIKUNI# VM24/557A-2.5 (SKU 002-840)
41. Needle valve 3.3 WITH KV10 O-RING TM32-1, TM34-2, TM36-2 STD MIKUNI# 786-46001-3.3 (SKU 002-705)
41. Needle valve WITH KV10 O-RING TM38-1, TM38-3 STD MIKUNI# 786-46001-3.5 (SKU 002-707)
41. Needle valve WITH KV10 O-RING TM38-85, TM38-86, TM39/41 PRO STD MIKUNI# 786-46001-3.5 (SKU 002-707)
42. Plate, Needle Valve All TM Series VM24/560 002-721
43. Screw All TM Series C2=0406 002-722
44. Vent Hose VM14/49 002-755
45. Gasket, Front Cover TM24-8001, VM28-418 (TM28) VM28/1044 002-847
45. Gasket, Front Cover TM38-85, TM38-86, TM39/41 Pro VM38/126 002-726
48. Screw All TM Series VM38/133 002-749
49. Air Screw, Pilot TM24-8001, VM28-418 (TM28) VM20/584 002-850
49. Air Screw, Pilot TM32-1, TM34-2, TM36-2, TM38-1 VM24/672 007-768
49. Air Screw, Pilot TM38-3, TM38-85, TM38-86 VM24/672 007-768
49. Air Screw, Pilot TM39 and TM41 Pro Series VM24/672 007-768
50. Spring, Pilot Air Screw All TM Series M12/46A 002-181
51. Washer, Pilot Air Screw TM32-1, TM34-2, TM36-2, TM38-1 VM12/33 002-856
51. Washer, Pilot Air Screw TM38-3, TM38-85, TM38-86 VM12/33 002-856
51. Washer, Pilot Air Screw TM39 and TM41 Pro Series VM12/33 002-856
52. O-Ring, Pilot Air Screw TM32-1, TM34-2, TM36-2, TM38-1 N133.037 002-858
52. O-Ring, Pilot Air Screw TM38-3, TM38-85, TM38-86 N133.037 002-858
52. O-Ring, Pilot Air Screw TM39 and TM41 Pro Series N133.037 002-858
53. Main Air Jet BS30/97
54. Overflow Hose VM14/49 002-755
55. Starter Jet All TM Series VM17/1002
56. Idle Stop Screw TM24-8001, VM28-418 (TM28) 603-27002 002-860
56. Idle Stop Screw TM32-1, TM34-2, TM38-85, TM38-86, TM39/41 Pro, TM39 and TM41 Pro Series 603-16003 002-861
56. Idle Stop Screw TM38-85, TM38-86, TM39/41 Pro 603-16003 002-861
56. Idle Stop Screw TM39 and TM41 Pro Series 603-16003 002-861
57. Spring, Idle Screw TM24-8001, VM28-418 (TM28) VM15/112 002-863
57. Spring, Idle Screw TM32-1, TM34-2 VM24/556 002-864
57. Spring, Idle Screw TM38-85, TM38-86, TM39/41 Pro VM24/556 002-864
58. O-Ring, Idle Screw TM24-8001, VM28-418 (TM28) VM14/75 002-676
58. O-Ring, Idle Screw TM32-1, TM34-2, TM38-85, TM38-86, TM39/41 Pro BV32/04 002-212
59. Washer TM24-8001, VM28-418 (TM28) VM14/87 002-866

007-731This adjuster has threads on one end, the other end swivels. Includes rubber cap, locknut, cable adjuster and 90ยบ tube. Works on Keihin and Mikuni carburetor caps.

The kit 007-731 contains:
002-061 rubber cap
002-065 nut
007-757 adjuster
007-759 90 degree threaded tube

TM POWER JET KIT

TM POWERJET KIT 002-041
The Power Jet Kit is used on 2-stroke engine applications to improve mid-range throttle response and add additional fuel to wide open throttle running conditions. Easily installs on TM series Carburetors (#80, #100 and #120 sized jets included). Sold as a kit.

TM Cable Type Starter System Kit. Replaces knob plunger type starter system with a cable type starter
system. Sold as a kit. Two Kits available:

Order No. 002-351
Fits the following TM Carburetors: TM32, TM34, TM36, TM38
and 39mm Pro-Series, 41mm Pro-Series
Includes items A - F.

Order No. 002-353
Fits the following TM carburetor: VM28/418 (TM28)
Includes items A - F.

A. Starter Plunger Top, Rubber Cap VM26/46 002-061
B. Cable Adjuster M21/14 002-062
C. Cable Adjuster Locknut B30/247 002-065
D. Starter Plunger Fitting VM15/37 002-093
E. Starter Plunger Spring VM32/69 002-094
F. Starter Plunger (TM32-TM41) VM15SC4/85 002-095
Starter Plunger (TM28) VM15SC4/86 007-751

TM Series Throttle valves

TM24 (TM24-8001) 3.0 832-30005 002-951
TM28 (VM28-418) 2.5 832-33001 002-804
TM32 (TM32-1) 4.0 832-39012 002-800
TM34 (TM34-2) 4.0 832-39012 002-800

Old Style TM 36, TM38 Carburetor with Top Idle Adjuster Rod
TM36 (TM 36-2), TM38 (TM38-1, TM38 (TM38-3)
2.5 832-43002 002-734 No longer available
3.0 832-43002 002-735 No longer available
4.0 832-43002 002-737
5.0 832-43002 002-739 No longer available

New Style TM 38 Carburetor, with Side Idle Adjuster Screw
TM38 (TM38-85), TM38 (TM38-86)
2.5 832-43011 007-401
3.0 832-43011 007-402
3.5 832-43011 007-403
4.0 832-43011 007-404
4.5 832-43011 007-405

TM33 Pumper (TM33-8012) 1.5 832-38007 002-948
TM40 (HS40) Pumper (TM40-6) TM40/81 007-430


NEEDLES