2004 Bombardier DS650/DS650 Baja/DS650 Baja X Shop Manual, Page 72Get this manual

2004 Bombardier DS650/DS650 Baja/DS650 Baja X Shop Manual, Page 72

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Section 03 ENGINE Subsection 03 (LEAK TEST)
1 Leak tester 2 Adequate adapter for spark plug hole 3 Air supply hose

Note the amount of leaking or percentage (depending on tester)LEAK