My X30 engine has done thirty and a half hours. I have found it very reliable. Costs for the engine itself �850. Costs for the Carb �150. Costs for the Coil and Loom �0. Starter motor, one change of brushes only. Radiator �40. Tyres at least one new set a race. Problems were the piston having a hole blown through the piston head twice. On advice from Iame I made some changes and so far so good. So, just for the engine the costs were �34 an hour. All karts use tyres, slicks or wets, depending on weather and tracks. Now the engine is at the engine builder having the conrod changed just for safety sake. Nothing wrong with it but better safe than sorry. The piston after 4 hours is in mint condition. For me X30 is the best engine, most enjoyable, easy to take care of and not very expensive.
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