crankshaft bearing set ARTEK K1 XL racing SKF polyamide for Minarelli AM

ARTEK crankshaft bearing sets are high-quality SKF bearings and Corteco oil seals are used.SKF bearings are available in the required C4 tolerance and suitable for up to 20,000 rpm. This is the polymer version and is more sensitive to engine tuning, as the polymer shells must not be exposed to temperatures over 120°C for prolonged periods of time. Correct tuning and carb set up is a must. For this reason, these bearings cannot be fitted to engines with catalytic converters. Attention: Half open design must face toward the crankshaft.