BASIC MANUAL“X30 SUPER 175CC”
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FEEDING
Fuel mixture 98RON and 4,5% oil (CIK homologated)
Our experience dictates use of oils, such as:- WLADOIL K 2T;- ELF HTX 909;
- ELF HTX 976;
- SHELL ADVANCE RACING M.

LUBRIFICATION GEARSATTENTION: the engine is supplied without oil in the gear vain.
GEARS OIL CHARGING
Before use, remove the breather plug and add oil through the hole on the crankcase(A) about 40ml with specific SAE 30, for example WLADOIL IAME GEAR OIL.
In order to check the prescribed correct quantity of oil in the crankcase, unscrew thescrew (V) from the engine as shown in the picture, if the oil slightly flows out, thequantity is correct.
A complete oil change is recommended after 5 hours of operation.
GEARS OIL DISCHARGING
Remove the drain plug (B) to discharge oil.

AV
B
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COOLING SYSTEM CONNECTIONSCONNECT THE SYSTEM AS SHOWN IN FIGURE

FROM HEAD
PIPE FITTING

TO THECRANKCASE

Once the system is filled (with pure water), provide to the proper air venting.
We recommend the use of a 3 way-thermostat (opening temperature 48°C±2), as
shown on the drawing, especially during the wintertime.
It is though possible to make a direct connection, removing the thermostat, the T-pipeand the bypass-tube between them.
The presence of the thermostat doesn't eliminate the need for adequate partializationof the radiant surface and for protective spoilers on the cylinder during the coldseason (temperature ≤5°C).

ATTENTION: water cooling operation temperature
limits: min. 48°C / max. 54°C

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ELECTRIC SYSTEM
The engine mounts ignition of the digital type with fixed advance at 22°.
When the piston is at T.D.C. the notches of the rotor and stator coincide.

ATTENTION: VERY IMPORTANT IS CONNECT TO CRANKCASE(C) THE COPPER WIRE TO ENGINE AND COIL’S BODY.

C
3MAN-78CARBURETTOR ADJUSTEMENT( I ) TROTTLE
SPEED SCREW( L ) LOW SPEED FUEL MIXTURE( H ) HIGH SPEED FUEL MIXTURE
RICH 1 T.O.* LEAN
1 ¼ T.O.
*¾ T.O.
1 ½ T.O.

T.O. = TURNS OPEN

Normally the correct setting of the mixture screws, after engine run-in, is the following:L (close the screw completely and then open): 1 T.O.
(1 turn )H (close the screw completely and then open): 1 T.O. e ¾ (1 turn and 45’)

Based on various factors as altitude, ambient temperature etc. It might benecessary to reset the carburettor to optimize the performance of the engine.

ATTENTION:- Never lean too much as lean mixture will overheat engine and cause seizure.
- Do not force H or L closed. It may damage the precision machined orifice and render thecarb. unserviceable.
- The adjustment of screw must be performed with warm engine.

4MAN-78

EXHAUST GAS TEMPERATURE PROBE
The muffler, supplied with the engine is provided with a temperature probe fitting
which is not drilled.
Whenever you wish to employ the probe, please proceed as shown in the figure
below.

drill exhaust Ø4.2 for cylindrical probe
drill exhaust Ø4.2 and thread M5 for threaded probe

EXHAUST LENGTH SETTING
The following table shows the exhaust length setting (distance “X” between
exhaust plane on the cylinder and end of first sector of muffler) depending on thetrack conditions and needed power diagram.
In general, by shortening the total exhaust length the low RPM an improvement athigh RPM is achieved and vice versa, by lengthening the exhaust length the low
RPM is improved.
For shortening or lengthen the exhaust, the only thing permitted is use of more
spacers 5mm and seals provided by "IAME".

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MAIN ENGINE COMPONENTS AVERAGE
ESTIMATED LIFEThe estimated life of the different components, of the engine, changes according
to the use and to the desired performance.
PISTON / CYLINDER MATCHING
The piston replacement must take place within specific intervals, measured throughused mixture liters and it changes depending of the engine use, if for competitiveuse (so to reach the better performance) or not competitive.
IAME suggests to replace the piston during the competitive use any 100lt, or
before whenever the clearance between piston and cylinder exceeds 0.16mm.
For NOT competitive use the replacement must take place any 150 liters of
mixture or whenever the clearance between piston and cylinder exceeds 0.16mm.
Every 50 liters inspection process is recommended to check the state of the pistonof the piston itself.
The prescribed clearance between cylinder and new piston, is 0.13mm.
The effective piston diameter has to be verified at 18mm from the base,perpendicularly to the piston pin.

The measure marked on the piston top is the effective one of the piston.
Moreover, the clearance between the piston ring tips (installed in the cylinder)
must be between 0.40÷0.45 mm.
The clearance can be checked with a feeler gauge, by inserting the ring in thecylinder.
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CONROD BIG END CAGE, CRANKPIN, SHIM AND MAIN BEARING
During the competitive use we suggest the replacement every 200lt .
For NOT competitive use the replacement can be made about every 250lt.

CONROD SMALL END CAGE
The replacement must be made every 100lt.

CONROD
During the competitive use we suggest the replacement every 400lt.
For NOT competitive use the replacement can be made every 500lt.
Anyway it must be replaced whenever the big end hole ovalization exceeds
0.01mm. This value is the difference between the diameter measured in "A" and"B" as below indicated.

7MAN-78TECHNICAL DATA ENGINE SUMMARY TABLEDESCRIPTIONFUEL MIXTURE / FUELGEARBOX OIL

DATA

NOTES

4,5 % OF OIL

98 RONOil CIK homologated

33 ml

specific:
SAE 30(example: WLADOIL
IAME GEAR OIL)

OPERATING TEMPERATURE ENGINE

min.48°C / max.54°C

EXHAUST ANGLES TIMING REFERENCE

186°±2°TIMING ADVANCE

Feeler gauge 0.2x5mm

22° fixed advance

COMBUSTION CHAMBER VOLUME

14.25 cm³

13.8 cm³ min.

SQUISH

0.95 mm

Measured with single
wire from 1.5mm

CORRECT MEASURE TIPS PISTON RING

0.40÷0.45 mm

installed in the cylinder

SPARKPLUG TYPE USE INSTANDARD WEATHER CONDITIONSNGK R6254E – 105

SPARKPLUG TYPE USE IN
RAIN ATMOSPHERIC CONDITIONSNGK BR 10 EG8MAN-78