9850067 R01 - 2020-2021
GENERAL
/
GENERAL XP
Service Manual
© Copyright Polaris Inc.
3.69
VALVE LASH - TAPPET SELECTION
A 440 tappet means the thickness of the tappet is 4.40 mm. Part Number: 5138477-XXX (X’s represent 3 digit tappet
size)
An Engine Valve Lash Adjustment calculator has been created and is located under Service and Warranty – News,
Forms and Links.
Click or go to
https://www.polarisdealers.com/files/ServWarr/English/Engine%20Valve%20Adjustment%20Calculator.
The proper valve tappet may also be obtained by completing these steps:
IMPORTANT
The Valve Lash Specification and Measured Valve lash must be calculated in millimeters (mm)
1. Subtract the actual valve lash on the engine from the valve lash specification (i.e. 0.29 mm – 0.20 mm) = 0.09 mm.
2. Divide the 3 digit tappet number by 100 (i.e. 450 / 100) = 4.5 mm.
3. Add the results of step 1 and step 2 (i.e. 0.09 mm + 4.5 mm) = 4.59 mm.
4. Multiply that answer by 100 to obtain the correct new tappet (i.e. 4.59 mm x 100 = 459).
5. Refer to the table below to find the closest available tappet size to the result from step 4 (i.e. 459 should be
rounded to 460 since there is a 460 tappet).
AVAILABLE TAPPETS
440
450
460
470
480
490
500
510
520
530
540
442
452
462
472
482
492
502
512
522
532
542
445
455
465
475
485
495
505
515
525
535
545
448
458
468
478
488
498
508
518
528
538
Содержание G21G4D99AW
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