Karcepts KPS0X - Manual (Page 9)

5. TENSIONING THE BELT
1.
Loosen the button heads which were previously snugged such that the
tensioner block will move up and down freely within the tensioner bracket.
2.
Tighten on the adjusting bolt to set proper tension. Tensioning may be
performed with a Krikit II V-Belt Tension Gauge which can be ordered through
any NAPA auto parts store. It’s a very inexpensive yet handy tool!
3.
On a new belt, you want to set the initial static belt tension such that the Krikit II
reads 140lbs. NOTE: This setting is higher than desired for normal operation, but
is necessary for proper break-in. Run the engine for 3-5 minutes at this setting.
After break-in is complete, re-tension to 100 lbs. Re-tension every 5,000 miles.