Sounds like you are on the right track. Your correct about the wet line. You can see it. Don't be afraid to push the rpm past 13k. On dirt oval we often were at the 14k area. Direct drive sprint twist them way up the scale.
The late great George Clausen an expert KT builder from Iowa taught me how to tune the WB3a. The sweet spot on the high speed was about an eighth to a quarter. Start with the low speed at 3/4, hit the track at 1&1/4 for pace laps, open to 1&1/2 for the start, open 1/4 after two laps, another after two more, fine tune + or - an eighth and back to 1&1/4 for yellows. Start over at 1&1/2 for the restart and go from there. Takes a little getting used too but comes after some time. On the yellows don't be afraid to quickly turn the low speed donw to the stop and back open to get your bearings if you get lost. At our track all the Junior 2 kids had this down pat.
Always knew the carb was right when egt was 1.1k, head temp was about 390 (old style head) and the plug after the race was clean white with a nice yellow ring about half way down the insulator. Never seized a KT with any of the kids after hundreds and hundreds of races.
DK
The late great George Clausen an expert KT builder from Iowa taught me how to tune the WB3a. The sweet spot on the high speed was about an eighth to a quarter. Start with the low speed at 3/4, hit the track at 1&1/4 for pace laps, open to 1&1/2 for the start, open 1/4 after two laps, another after two more, fine tune + or - an eighth and back to 1&1/4 for yellows. Start over at 1&1/2 for the restart and go from there. Takes a little getting used too but comes after some time. On the yellows don't be afraid to quickly turn the low speed donw to the stop and back open to get your bearings if you get lost. At our track all the Junior 2 kids had this down pat.
Always knew the carb was right when egt was 1.1k, head temp was about 390 (old style head) and the plug after the race was clean white with a nice yellow ring about half way down the insulator. Never seized a KT with any of the kids after hundreds and hundreds of races.
DK