Main bearings Fag Aprilia MX125 2003-2008 crankshaft

Racing Fag main bearings for all Rotax 122 and Aprilia 125cc 2-stroke engines.

Technical details of TB.P63 bearing:

• internal 30mm
• External 62mm
• Width 16mm

TB = (Segmented Cage Type, Code TB) = Fabric reinforced phenolic resin window cage, centered on the inner ring.

P63 = Combination of P6 dimensional and running accuracy according to ISO tolerance class 6 (better than normal)

Phenolic is a type of thermosetting resin, which is obtained thanks to bakelization.

It is caused by thermosetting resins which, when subjected to heat and catalysts, give rise to an insoluble mass, which can be used as an insulator and coating material. The result is a resin that guarantees considerable thermal and chemical resistance, as well as excellent adhesive properties, thus allowing the creation of a product with a very low degree of flammability.