JB Conversions 16-1204 HD Standard Length SYE Kit for the NP241 - Manual (Page 10)

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16) Remove the retaining ring holding the main drive sprocket
assembly in place. Remove the sprocket assembly from the shaft
(Fig.15).
FIG: 15
17) Inspect the inside of the main drive sprocket for the presence of
needle bearings. If the bearings are present, remove them with a
press. The deletion of these bearings is per OEM design. After 1995,
the mfg. (New Venture Gear) adopted this design and it performs fine
(Fig.16,17).
FIG: 16 FIG: 17