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They produce the best power a tad on the lean side and higher rpm. Both of which reduce engine life. But a fair compromise is to run it around 15,500 top rpm and try to hit the jetting about on the nose. 1-1/2 turns on the low and between 7/8 and 1 turn on the high.
Keep the carb filter clean, your fuel well mixed and 18 to 1 with a good caster like Burris or Maxima 927 (actually the same oil but with dyed a different color). The Leopard should give a good solid 15 to 20 hours of competitive hp if you run it like that.
Not owning a Leapord I have to agree with Doug’s assesement as being spot on. Spin to win and you’ll be in the shop a lot with rebuilds. Lean it too much and you’ll have a nice grenade. Ask the racers last year that popped their motors last season. At one race (I think) there were 5 or so kablooey’s…
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