stephen
Unfortunately i could not check the power jets last time the carbs were apart as the heads on the alloy screws are knackered, may need to drill them out and replace if there still available. Should i run power jets as large as possible?

Power was very low for a 300 kit [can't say as the abuse would be too great from all 300 haters!!!] but then it only did one run when we found this problem.
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MC21 300
Aprilia RS250 track bike