The KA100 engine is currently being manufactured to the highest specification level as per the current IAME X30 engine.
Here are some examples...
The same crank pin and big end cage designed for and used in the current 2014 IAME KZ engine which delivers around 48hp is used in the KA100. It delivers around 22hp in the ‘unrestricted’ specification, so it is well under stressed, leading to much long bottom end life.
The crankcase, crankshaft, clutch and electric starter system has been derived from a 125cc engine, with more power and higher rpm. This ensures that the KA100 has a very stable crankcase in relation to displacement. Being a 100cc engine, it produces much less vibration than a 125cc and no balance shaft is needed.
In three years of on-track testing in Australia we never broke a starter motor brush. Reliability of the engine and its components has been the highest of priorities right through the development process.
I’ll compare it to some other IAME engines that Australian drivers would be familiar with.
The “RL” Leopard has an 18mm crankpin and the KA100 uses a 20mm crankpin.
The KA100 is more similar to the X30 engine and utilises X30 parts including the complete clutch assembly.
Other features of the KA100 engine include:
- Simple Analogue ignition plant.
- No microprocessor, no programmable unit.
- Simple cable harness, just for engine starting (starter motor only).
- Engine start possible even without battery, by an external starter.
- Air cooling simplicity No radiator hoses, no water pumps, no belts makes it easier for the beginner for removing and replacing the engine.
Air cooled engines have been successful for many years.
Its very simplicity and reliability makes it easy to use, desirable to race and a fantastic engine that will serve the Australian karting community very well for many years to come:
- Extended fins: controlled engine temperature even at very hot climatic conditions.
- Less components, less maintenance.
- High quality, accurate machining:
- Precise cast iron liner with 5-Axis CNC machined ports.
- Very precise conrod inter-axle and stroke.
- High hardness aluminum alloy for cylinder barrel, cylinder head and crankcase.
- Casehardened and grinded steel for crankshaft and conrod, allowing to be disassembled and re-assembled hundreds of times.
- No multiple parts purchasing for performance selection, money saving.
A new machining process has been used in the manufacturing process for the Tillotson carburetor fitted to the KA100 engine.
The tolerances are individually checked during production.. The most important aspect of the performance of the carburetor is the venturi. The venturi is fully machined and has a very tight manufacturing tolerances so as to minimise variations between carburetor units.