notsed Posted July 22, 2012 Report Share Posted July 22, 2012 can anyone give me a ball park on jetting a 421 serval with stock carbs, t5's, +2 timing, toomey 2-1 filter, 600' asl, 80-90* weather, running 94 octane, 155lbs comp Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted July 22, 2012 Report Share Posted July 22, 2012 start at 340-350 main, 27.5 pilot and stock needle in middle clip. Quote Link to comment Share on other sites More sharing options...
notsed Posted July 22, 2012 Author Report Share Posted July 22, 2012 will do thanks Quote Link to comment Share on other sites More sharing options...
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