Kasama Srimok 90 User manual

2
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Designed By KASAMA
Cooperate With
Ultimate Heli-UAE
1359
419 194

3
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Thank you for your purchase of Srimok 90 radio controlled helicopter .
The Srimok 90 was designed and developed by Mr. Kasama Thaworn. With
strong and friendly support from Ultimate heli U.A.E. It combines both
elements of his previous designs , newly advanced technologies and
materials . The design ideas are not only from flying , but also from
many years of rc experience . So the beginners and advanced 3-d fliers
will definitely be impressed with Srimok 90.
This radio controlled helicopter is not a toy. It is a sophisticated piece
of equipment that was designed for hobby use only .If it is not properly
assembled , maintained or operated , it is capable of causing property
damage and bodily harm to both operator and/or spectators . Kasama
helicopters co., ltd. affiliates and its authorized affiliatesassume no
liability for damage that could occur from the assembly, use and/ misuse
of this product. If you are new to the hobby we strongly recommend
seeking help and advice from an experienced modeler. Srimok90 is a very
high speed helicopter, it was
not intended for beginners or novice
building, setup or flying.
Operatiing a model helicopter requires a high degree of diligence and
skill. if you are a newcomer to the hobby , it is best to seek help and
guidance from experienced radio controlled helicopter pilots . This will
both greatly speed up the learning process and make it much safer and
enjoyable.
We also would strongly urge you to join the Academy of Model
Aeronautics. The AMA is a non-
profit organization that provides its
member with a liability
insurance plan as well as monthly magazine
entitled Model aviation .All clubs operate in accordance with AMA
principles at their fields. For further information ,contact the AMA at
Academy of Model Aeronautics
5151 East Memorial Drive
Muncie, in47302
[317] 287-1256
INTRODUCTION

4
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Swash Plate and Link
Installation 29
Wash Out Arm Installation 30
Center Hub and Seesaw
Installation 31
Rotor Grip Blade Installation 32
Rotor Head Linkage 33
Cyber Swash Plate Drive
Installation 34
Cyber Center Hub Installation 35
Cyber Rotor Grip Blade
Installation 36
Tail Bell Crank Installation 37
Tail Rotor Head Assembly 38
Pre Installation Tail Boom 39
Mark and Drill Tail Boom 40
Torque Tube Assembly 41
Tail Boom Assembly 42
Front Frame Installation 43
Canopy Installation 44
Section Description Page
Introduction 3
Index 4
Landing Gear Installation 5
Fuel Tank Plug Assembly 6
Main Frame Assembly Step 1 7
Main Frame Assembly Step 2 8
Main Frame Assembly Step 3 9
Bevel Pinion Gear Assembly 10
Bevel Pinion Gear Installation 11
Tail Boom Clamp Installation 12
Bearing Block Installation 13
Main Gear Assembly 14
Main Shaft and Main Gear
Installation 15
Clutch Bearing Block
Installation 16
Engine Mount Assembly 17
Engine Installation 18
Cooling Fan/Clutch Installation 20
Cooling Fan Shroud Assembly 21
How To Adjust Pinion Gear And
Clutch Bearing Block Mounting 22
Clutch Bearing Block Mounting
Installation
How to Adjust Clutch Bearing
Block Mount 23
Anti Rotation Blacket Assembly 24
Tail Throttle and Cyclic
Servo Mount Installation 25
Cyclic Servo Mount Assembly 26
Cyclic Servo Installation 27
Elevator Servo Assembly 28
INDEX
PLEASE READ THIS MANUAL CAREFULLY BEFORE INSTALLATION

5
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Skid Pipe end cap
Landing skid pipe
Set screw M4x5
Plastic Landing gear skid
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM70-F09
Skid Pipe end cap
4
2
KSM10-F25
Landing skid pipe
2
3
KSM60-019
Set screw M4x5
4
4
KSM70-F18H
Plastic Landing gear skid
2
LANDING GEAR INSTALLATION 1-BOX1

6
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
THE FUEL TANK CAP ASSEMBLY
1) Tighten the plug bolts until they are flush with the plug.
2) Insert plug fully into tank.
3) Rotate plug until bolts are level with tank mounding line
4) Tighten plug bolts (M2.5x20) by punctuate each one around
until full 2 around.
Socket screw M2.5x20
Fuel tank fitting
Fuel tank cap
Fuel tank seal rubber
Fuel tank back plate plastic black
Silicone tube 5x44 (not included)
Silicone tube 4x100(not included)
Fuel magnet (not included)
Fuel tank nipple
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM70-FT02
Fuel tank cap
1
2
KSM70-FT06
Fuel tank seal rubber
1
3
KSM70-FT04
Fuel tank fitting
3
4
KSM70-FT09
Silicone tube 4x100
1
5 KSM70-FT05
Fuel tank back plate
plastic black
1
6 KSM60-051
Socket screw
M2.5x20
2
7 KSM70-FT01 Fuel tank plastic (600
cc) 1
8
KSM70-FT03
Fuel tank nipple
1
FUEL TANK PLUG ASSEMBLY 2-BOX1

7
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
MAIN FRAME ASSEMBLY 3-BOX1
Cyclic servo, Extension GV mount
Frame cross member
Balance damper mount support
Socket screw M3x8
Washer 3x7x1.0
Fuel tank mounting rubber
Bearing Block Elevator
Flank bearing 4x8x3
Socket screw M2.5x6
Button screw M3x6
KSM mark out side
Extension GV mount
Socket screw M3x6
Wire mounting rubber
Main frame R G10 ECO
A
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM40-90F05
Main frame R G10 ECO
1
2
KSM10-C10
Bearing Block Elevator
1
3
KSM60-048
Socket screw M2.5x6
2
4
KSM10-F05
Cyclic servo, Extension GV mount
1
5
KSM60-052
Button screw M3x6
2
6 KSM10-F02 Frame cross member 1
7
KSM60-034
Socket screw M3x8
1
8
KSM60-029
Washer 3x7x1.0
1
9
KSM10-F27
Balance damper mount support
1
10
KSM70-FT07
Fuel tank mounting rubber
1
11
KSM10-26
Balance damper mount rod
1
12
KSM70-F06
O-ring damper rubber 80 duro
2
13
KSM70-F08
Clip lock damper mount adjusting steel
2
14
KSM70-F06
Balance damper mount adjusting
2
15 KSM60-033 Socket screw M3x6 1
16
KSM40-F06
Extension GV mount
1
17 KSM70-F05 Wire mounting rubber 1
18
KSM30-118
Flank bearing 4x8x3
1
NOTE: To protect wiring and fuel tubing it is best
to sand the G10 frame edges
Balance damper mount body system

8
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
MAIN FRAME ASSEMBLY 4-BOX1
Fuel tank mounting rubber
Main frame L G10 ECO
Wire mounting rubber
Balance damper mount support
KSM mark below and outside
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1 KSM40-90F06 Main frame L G10 ECO 1
2
KSM10-F27
Balance damper mount support
1
3 KSM70-FT07 Fuel tank mounting rubber 1
4
KSM70-F05
Wire mounting rubber
1

9
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
MAIN FRAME ASSEMBLY 4-BOX1
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM60-031
Socket screw M3x32
3
2
KSM60-091
Socket screw M3x35
1
3
KSM60-034
Socket screw M3x8
3
4
KSM60-029
Washer 3x7x1.0
12
5
KSM60-027
Hex lock nut M3
4
6
KSM60-008
Socket screw M3x15
1
7
KSM10-F06
GV mount spacer
1
8 KSM40-F13 Double side frame G10 2
9
KSM10-F02
Frame cross member
1
C
D
C
D
Socket screw M3x8
Socket screw M3x15
GV mount spacer
Socket screw M3x35
Washer 3x7x1.0
Socket screw M3x8
Hex lock nut M3
Socket screw M3x32
Double side frame G10
Frame cross member

10
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
NOTICE : Press the two parts together and tighten
the 2 M3 pinch bolts. Make sure the shaft runs
smoothly.
NOTICE : The pinion shaft must reach and be level
with the end of the front bevel gear and tighten
the 4 M3 Set screws.
BEVEL PINION GEAR ASSEMBLY 5-BOX2
Tran output shaft
Set screw M3x4
Bevel Gear 15T
Socket screw M2.5x8
Tail Drive Joint Front
Ball bearing 6x13x5 Bevel pinion bearing block
the bevel pinion shaft front end
bevel gear front end
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM10-T08
Bevel pinion bearing block
1
2 KSM30-117 Ball bearing 6x13x5 2
3
KSM10-TS19
Tail Drive Joint Front
1
4 KSM20-T11 Tran output shaft 1
5
KSM60-056
Socket screw M2.5x8
2
6
KSM60-002
Set screw m3x4
4
7
KSM20-T12
Bevel Gear 15T
1

11
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
BEVEL PINION GEAR INSTALLATION 5-
BOX2
Adjust bevel pinion gear
DETAIL E
bevel pinion gear set
Adjust bevel pinion gear
Washer M3x7x1.0
Socket screw M3x32
Hex lock nut M3
Mark points to tail
E
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM60-027
Hex lock nut M3
2
2
KSM60-031
Socket screw m3x32
2
3 KSM60-029 Washer M3x7x1.0 4
4
KSM20-TS09
Adjust bevel pinion gear
1

12
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Optional plastic film included if required
TAIL BOOM CLAMP INSTALLATION 6-BOX2
Socket screw M3x32
Hex lock nut M3
Tail boom clamp front
Tail boom clamp rear
Washer M3x7x1.0
Upper screw for install
and remove tail boom.
Parts List
ITEM PART NUMBER DESCRIPTION QTY
1
KSM60-027
Hex lock nut M3
4
2
KSM60-031
Socket screw M3x32
4
3
KSM60-029
Washer M3x7x1.0
8
4
KSM10-T06
Tail boom clamp front
1
5
KSM10-T07
Tail boom clamp rear
1

13
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
BEARING BLOCK INSTALLATION 7-BOX2
Center main bearing block
Lower main bearing block
Upper main bearing block
Hex lock nut M3
Socket screw M3x32
Washer M3x7x1.0
Socket screw M3x8
Small ID.
Larget ID.
Small ID.
Larget ID.
KSM30-110
KSM30-111
KSM30-102
KSM30-110
KSM30-110
KSM10-TS01
KSM10-TS02
KSM10-TS03
BEARING BLOCK INSTALLATION
1) Slide Lower and Middle Bearing Blocks into place between the G10 frames and insert M3x32
bolts and apply washers and nuts.
2) Insert Top Bearing Block and insert M3x8 screws but do not tighten.
3) Insert mast through 3 bearing blocks.
4) Push DOWN on Lower Block and gently tighten bolts.
5) Push UP on Middle Block and gently tighten bolts.
6) Tighten Top Block M3 bolts and remove mast-remove Top Block bolts one at a time-thread
lock and re-tighten.
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM60-034
Socket screw M3x8
4
2
KSM60-027
Hex lock nut M3
4
3 KSM60-031 Socket screw M3x32 4
4
KSM60-029
Washer M3x7x1.0
12
5 KSM10-TS01 Upper main bearing block assembly 1
6
KSM10-TS02
Center main bearing block assembly
1
7
KSM10-TS03
Lower main bearing block assembly
1

14
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Crown Gear hub 6061
Crown gear 70T
Taper screw M3x8
One way bearing shaft
One way Key
Autorotation Bearing
Main Gear Case 6061
Main gear 99T
Taper screw M3x6
One way key
Washer 13x19x2
Main Gear Direction
MAIN GEAR ASSEMBLY 8-BOX2
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM10-TS21
Main Gear Case 6061
1
2
KSM30-112
Autorotation Bearing
1
3
KSM70-TS02
Main gear 99T
1
4
KSM60-024
Taper screw M3x6
8
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM20-TS01
One way bearing shaft
1
2
KSM10-TS22
Crown Gear hub 6061
1
3
KSM30-125
One way Key
1
4 KSM60-025 Taper screw M3x8 8
5
KSM70-TS04
Crown gear 70T
1
6 KSM60-053 Washer 13x19x2 1

15
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
MAIN SHAFT AND MAIN GEAR
INSTALLATION 9-BOX2
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM20-TS03
Mast lock Pin
1
2
KSM20-TS02
Main Mast
1
3
KSM10-TS15
Mast lock Pin
1
4
KSM60-026
Socket screw M2.5x15
1
TEST ASSEMBLE THE MAIN SHAFT AND MAIN GEAR
3) Insert the main mast into the main gear set.
Adjust the holes of the main mast, mast lock
and one way shaft bearing to the same position.
2) Insert mast lock pin into that hole. Then lock
the mast lock cap by turning it at the same
direction as the arrow to close that hole.
NOTICE: The Arrow mark direction was shown
on the mast cap.
1) Insert the main mast into the main gear set.
Adjust the holes of the main mast, mast lock
and one way shaft bearing to the same position.
Mast lock
MAIN GEAR INSTALLATION TO FRAME
Main mast
Mast lock pin
Socket screw M2.5x15
Slide in from this side only (Frame L)

16
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Step in assembly BEVEL PINION GEAR clearly more above
can see in Tips & Information at www.kasama.com
After Main Gear is inserted you can adjust bevel gear up and down 1mm. by turning the Bevel
Gear Adjuster clockwise to raise the bevel gear and anti-clockwise to lower it.
1) Raise the bevel gear to its highest position by turning the Adjuster clockwise – lock bevel
gear block in place by tightening the two M3x32 bolts.
2) Loosen Lower Bearing Block bolts and push block down to allow Main crown Gear to sit on
Bevel Gear.
3) Loosen Center bearing Block bolts and push it down to sit on top of One Way Bearing then
tighten M3x32 bolts firmly.
4) Loosen Lower Bearing Block M3 bolts and push Block up till it rests on the bottom of the
OWB and tighten bolts.
5) Test Main Gear end-float by pulling Main Shaft up and down.
6) If there is no end-float tighten Lower and Center Bearing Block mounting bolts firmly – if
there is movement of gear and mast repeat steps 2-4.
7) Loosen Bevel Gear Block M3 bolts and rotate Adjuster until Bevel Gear has ~0.3-0.5 mm.
backlash on Main Gear. You can also ‘tune it’ by ear by spinning main gear till you get the
smoothest and quietest sound of the gears running.
BEVEL PINION GEAR ADJUSTMENT
CLUTCH BEARING BLOCK INSTALLATION 9
CCW = Down 0.5 mm (Approximately)
Zero point
CW = Up 0.5 mm (Approximately)
WARNING

17
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Turn the engine mount side till
the mark KSM in the same direction.
Engine Mount Side
Washer 4X8X1
Socket screw M4x20
Engine Mount Center
Washer 3x8x1.5
Socket screw M3x12
Main chassis engine mount ALU silver
Socket screw M4x15
O-Ring Damper Rubber 80 duro
Pump plate OS
Socket screw M3x6 OS engine pump
For OS engine the fuel line
from pump to engine should
be 38 mm.
Adjustable Engine Mount ALU silver
ENGINE MOUNT ASSEMBLY 10-BOX2
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1 KSM10-F18 Engine Mount Center 1
2
KSM10-F19
Engine Mount Side
2
3 KSM60-022 Socket screw M4x20 4
4
KSM60-020
Socket screw M3x12
4
5
KSM60-023
Washer 4x8x1
4
6
KSM60-038
Washer 3x8x1.5
4
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1 KSM10-F33
Main chassis engine
mount ALU silver
1
2 KSM10-F31
Adjustable Engine
Mount ALU silver
4
3 KSM70-H06 O-Ring Dumper rubber
80 duro 16
4
KSM60-035
Socket screw M4x15
4
5 KSM40-F07 Pump plate OS 1
6
KSM60-033
Socket screw M3x6
2

18
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
ENGINE MOUNT ASSEMBLY
1) Insert the M3x12 screws to attach the engine side mount to the engine center mount. Make sure the screws
are not too tight and the engine side mount can be able to slightly move forward and backward.
2) Put the engine on the engine side mounts. Pull the engine down slightly and use M4x20 screws to lock the
engine. Do not tighten up the screws yet.
3) Make sure that the engine is attached to the side mount firmly. Then slightly tighten the screws again without
locking it.
4) Check that the engine is perfectly square front and back and side to side to the engine center mount. Tighten
all screws locking the engine firmly.
5) If unsure that the engine is installed properly, restart the process from step 2 again.
6) If you are certainly sure that the engine is properly installed, take off the M4x20 screws individually one at a
time to apply thread lock and tighten it firmly.
ENGINE INSTALLATION 10
Engine
Socket screw M4x20
Washer 4x8x0.7
Washer 3x8x1.5
Socket screw M3x12

19
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
PRACTISE ASSEMBLY
1. Before assembling the cooling fan and
hub to the engine, pull the crankshaft
up and down to ascertain the degree of
movement – this is eliminated in the
following steps.
2. Put the cooling fan on the crankshaft
and pull the crankshaft up whilst
pushing the fan down – gently tighten
the M3x12 clamp bolts.
3. Check free play by pulling the shaft up
and down and repeat step 2 if there is
discernible movement.
4. If the shaft has no any end-play,
moderately tighten the M3x12.
5. Screw the starter shaft clockwise onto
the crankshaft with an 8mm. wrench –
you will need to hold the fan or
preferably lock the engine through the
back cover with a locking tool.
6. Check there is no end float by pulling
the starter shaft up and down and
checks fan movements to exclude
binding.
REAL ASSEMBLY
Repeat above steps 106 but apply thread
lock to fan clamp bolts and step 2. Before
mounting starter shaft in step 5 apply thread
lock. Place clutch over starter shaft and rotate
it down over the fan center hub-this may be a
little tight and require drawing down with
M4x8 bolts. If all is well the clutch shoes will
lie on the fan center hub and the shoes will be
centered. Remove M4 bolts, thread lock and
then re-apply to clutch-finally insert M3x8
bolts.
NOTE
Our system was specially designed to
mount the clutch close to the engine this help
balance high rpm vibration and lowers the CG
point too.
10
Crank-shaft
M3x12 fan
clamp bolt
starter shaft
Socket screw M4x8
Socket screw M3x8
Wrench 8 mm.
not include.
Washer

20
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
Pinion Gear (12T)
Magnets(not include)
Clutch bell
Bearing 12x21x5
Clutch O-ring
Socket screw M4x8
Socket screw M3x8
Clutch Shoe
Start Shaft
Cooling fan hub
Socket screw M3x12
OS KSM20-TS11
YS KSM20-TS12
NOTE:Use washer from kit for
OS engine but for YS use washer
that come with engine
COOLING FAN/CLUTCH INSTALLATION 11-BOX2
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM60-034
Socket screw M3x8
2
2
KSM60-020
Socket screw M3x12
2
3
KSM10-TS12
Cooling fan hub
1
4
KSM20-TS11
Start Shaft OS
1
5
KSM20-TS12
Start Shaft YS
1
6 KSM20-TS05 Clutch Shoe 1
7
KSM60-021
Socket screw M4x8
2
8
KSM70-TS05
Clutch O-ring
1
9
KSM10-TS11
Clutch bell
1
10
KSM30-115
Bearing 12x21x5
1
11
KSM20-TS08
Pinion Gear (12T)
1
12 KSM60-055
Washer 9.5x16x1.4
(for OS engine only) 1
Complete Assembly

21
Note: Apply blue thread lock to all screws, balls, and threads which it be
fixed to metal-parts. For non-metal parts apply CA Glue.
COOLING FAN SHROUD ASSEMBLY 12-BOX1
Hex lock nut M3
Washer M3x7x1.0
Socket screw M4x35x20
Hex lock nut M3
Washer M3x7x1.0
Socket screw M3x35
Washer M4x8x1
Hex lock nut M4
Socket screw M3x32
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM70-F02
Cooling Fan shroud (R)
1
2
KSM70-F03
Cooling Fan shroud (L)
1
3
KSM10-F24
Cooling fan Spacer
3
4
KSM60-041
socket screw M2x10
3
5
KSM60-031
Socket screw M3x32
3
6 KSM60-027 Hex lock nut M3 3
7
KSM60-029
Washer M3x7x1.0
6
Parts List
ITEM
PART NUMBER
DESCRIPTION
QTY
1
KSM60-059
Socket screw M4x35x20
1
2
KSM60-045
Hex lock nut M4
1
3 KSM60-023 Washer M4x8x1 2
4
KSM60-091
Socket screw M3x35
1
5
KSM60-027
Hex lock nut M3
1
6
KSM60-029
Washer M3x7x1.0
2
1) Assemble the fan shroud halves together
using the three M2x10 bolts. Insert the three
spacers into the shroud mounting holes.
2) Loosen the 4 M3x32 bolts securing the CF
frames to the main chassis mount and lift the
frames away from the mount.
3) Slide the Cooling Fan Shroud into the
frames then secure in place with the M3x32
bolts.
NOTE: Do not tighten all mounting bolts until
you have ensured that the engine fan is
centered in the shroud and not binding.
4) When sure fan is centered in shroud secure
all mounting bolts tightly.