Flat slides are notoriously hard to tune. Pilot jet, main jet, needle size and height, and so on. The offset is, they produce the best combination of low end and top end performance. Round slides are a little more forgiving in the tuning department. Most GY6 owners just pop the 30mm pumper on there and thats enough for them. The pumper on my Dazon has very crisp response and it runs like a scalded dog wide open.
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ASE Master and Toyota Master Diagnostic Certified
Buggy Building Trainee
'04 Dazon Raider 150 'modded'
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