IAME X30 125 Tech Info & Downloads
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Use & Maintenance
Designed specifically for the engine tuner (see Additional Maintenance information below*)
Designed specifically for the engine tuner
Instruction Manual for X30 Main Bearing Replacement - from Ball Bearings to New Roller Bearings
Retrofitting X30 Roller Main Bearings - Additional Checks
As a supplement to the “Main Bearing Replacement” manual IAME have provided some additional instructions and brief videos showing how to check some important clearances when fitting the X30 roller main bearings. These additional checks and videos are fundamentally intended for people retrofitting the bearings in existing engines previously fitted with ball bearings.
Please note it is important to degrease the bearings and remove the oil seals before checking the clearances, as any lubricant and seals acts as a damper making the measurements inaccurate.
1. Lateral Crankshaft End Play
This measurement is very important, as the end play is larger with the roller bearings installed while the crankcase is unchanged, naturally the clearance between the crankcase and crankshaft will be less in a lateral direction. Because of this close attention must be paid to the balance of the steel shims under the bearings, these must be distributed as equally as possible between the left and right sides.
To check the end float a dial gauge is placed on the end of the crankshaft. With the crankshaft pushed to one side against the dial gauge set the dial to 0. Now move the crank to the other side of the crankcase away from the dial gauge to check the measurement.
Specs:
Minimum: 0.45mm
Maximum: 0.55mm
2. Crank to Crankcase Clearance
As a precaution the clearance between the crankshaft and crankcase must be checked to ensure it is within specification. This check is performed by moving the crankshaft towards the side of the crankcase to be checked, a 0.25mm feeler gauge must fit into the gap, a 0.30mm gauge may or may not fit and a 0.35mm gauge should not fit. Push the crankshaft to the opposite side of the crankcase and repeat the measurement.
Specs:
0.25mm feeler gauge: Must enter
0.30mm feeler gauge: May or may not enter
0.35mm feeler gauge: Must not enter
3. Radial Clearance
The radial clearance is something the user cannot theoretically change but it is critical to the reliability of the bearing. In the case that the bearing seat is damaged or dirty it is possible for the clearance to be reduced so it is important to check to be safe.
The radial clearance must be between 0.02 and 0.03mm, this is measured by placing a dial gauge on top of the crankshaft and lifting the crank up in the crankcase. The crank must be lifted on both sides at once so the crankshaft moves parallel to its axis, if the crankshaft is lifted on just one side the reading will not be accurate.
Specs:
Minimum: 0.02mm
*Additional Maintenance Information
The following information OVERRIDES any specifications shown in the X30 USER & OVERHAUL MANUALS ABOVE:
- With continued testing we have found the new X30 muffler allows the engine to get up to operating temperature quicker than the old exhaust system, with this in mind we recommended a minimum piston clearance of 0.13-0.14mm.
- As stated in our X30 User Manual it is highly recommended to inspect the piston every 5 hours for excess carbon build up and ensure the piston ring is free in the groove. This is also a good time to check the piston for any signs of abnormal wear or damage.
- When purchasing a new X30 engine it’s supplied with a BR9EG spark plug, this plug is primarily intended for running in the engine as the hotter heat range helps burn excess fuel and avoid fouling while driving slowly. IAME recommend the use of a 10 or 10.5 heat range plug during normal use to keep combustion chamber temperatures low and extend piston life.
- For engines fitted with a PVL ignition system it is recommend to remove the ignition rotor every 5-10hrs and inspect the resin for signs of damage or deformation due to excessive heat. Replace with a new unit if damage is found.
Preparation and installation of the additional plate and engine-mount. We highly recommend you use the Black Anti-Vibration Plate that is supplied complete with your X30 engine. It absorbs vibrations which prolongs the life of the starter motor
Digital Ignition Wire Colours - Drawings
Green AKA20 CDI Unit
How to check the advance for the IAME X30 engine
