Yamaha LIT-11616-16-02 Selecting the Middle Drive and Driven Gear Shims, Selection steps

MIDDLE GEAR

ENG

4.Check:

●O-ring

Damage → Replace.

●Bearings

Pitting/damage → Replace. 5.Check:

●U-joint movement

Roughness → Replace U-joint.

SELECTING THE MIDDLE DRIVE AND DRIVEN GEAR SHIMS

When the drive and driven gear, bearing housing assembly and/or crankcase are replaced, be sure to adjust the gear shims.

1.Select:

●Middle drive gear shim 1

●Middle driven gear shim 2

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Selection steps:

●Position middle drive and driven gear by using shims 1 and 2 with their respective thickness calculated from information marked on crankcase, bearing housing and

drive gear end.

1Shim thickness “A”

2Shim thickness “B”

●To find shim thickness “A”, use following formula:

Middle drive pinion gear shim thickness: “A” = c – a – b

Where:

a = a numeral (usually a decimal number) on the bearing housing is either added to or subtracted from “10.5”.

b = drive pinion gear to driven pinion gear center distance (considered constant “55”).

c = a numeral (usually a decimal number) on the right crankcase specifies a thickness of “66”.

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