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Archive for November, 2016
Posted by Wrench66 | Nov 06, 2016 @ 03:16 AM | 8,933 Views
38mm Mikuni jetting mods....'82 Yz490
440 Main (stock)
R-0 needle jet series 247 (richer than the stock Q-8 )
6F8 Needle, clip in position 3 (leaner on bottom than stock needle)
40 pilot
carb slide mod to 3.5mm cutaway
Run 32:1 with good fuel.