Yamaha VMX12HC (1995) [171/405] M iddle g ear service

MIDDLE GEAR SERVICE

Exam ple: Selection of the drive pinion gear

shim;

Shim

Thickness =

Distance

“A ”

Distance

“B ”

If the drive pinion gear is stam ped “03” (plus

03) is implied here since only the m inus

(-)

designations are stam ped alongside the

num bers), then:

“A” = 53

0.03

= 54.53

NOTE:

All

stam ped num bers are in hundredths of a

mm.

If the left-side-rear of the upper crankcase

is stam ped then:

53 + 0.95

= 53.95

Therefore:

T=A-B

54.53 53.95

= 0.58 mm

calculated shim thickness is 0.58 m m .

Because shim can only be selected in 0.05

mm increm ents, use the follow ing chart to

round off the hundredths digit of the calcu-

lated thickness and selest the appropriate

shim,

the above exam ple, the calculated

shim thickness of 0.58 mm is rounded off to

0.60 mm. Therefore, you may choose either

0.15 mm shims, 2 0.30 m m shims, or

0.30 m m and 2 0.15 m m shims as

selected from the shim thickness chart

below . Shim size are supplied in the follow -

ing thicknesses:

Drive P inion G ear Shim