Dynojet Snowmobile Dynos: Installation Guide - Manual (Page 10)

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Step 9
Fit the cover into position and check clearances.
The Lift Handle on the back of the dyno should
move freely without binding.
When everything fits well, you may tighten down
the (5) 1/4” button head screwss
Step 10
Install Lid Extension with (4) 1/4” button head
bolts.
Lid Extension