Sonnax Koyo, needle bearing camshaft. ‘Full needle’

Description

Sonnax Koyo, needle bearing camshaft. ‘Full needle’

58-99 Big Twin (Excl. Twin Cam) (NU)

Koyo=former Torrington. When still present it is advised to replace the low cost OEM needle bearing in 92-99 Evolution Big Twin models marked ‘INA SCE 138 USA’ with a ‘full needle’ bearing to increase reliability. Especially important when using higher lift cams, which increases stress in the camshaft bearing.

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