Valve Lash - Tappet Selection - Polaris RZR PRO XP 2020 Service Manual

ENGINE / COOLING SYSTEM

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.pdf
The proper valve tappet may also be obtained by completing these steps:
The Valve Lash Specification and Measured Valve lash must be calculated in millimeters (mm)
1. Subtract the valve lash specification from the actual valve lash on the engine (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).
440 450
442 452
445 455
448 458
3.100
AVAILABLE TAPPETS
460 470 480
462 472 482
465 475 485
468 478 488
IMPORTANT
490 500
492 502
495 505
498 508
9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
510 520 530
512 522 532
515 525 535
518 528 538
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