jlsparky7 Posted December 6, 2011 Report Posted December 6, 2011 4 mill, pro circuit pipes, stock carbs, modded air box with lid, K&N, bored .0030 wiseco's. head shaved .0030, running 94 oct 40:1, +4 timing A 290 is spot on at 70 degrees, if i ride around 30-40 degrees whats a good starting point to bump the jets to. 320-330 im thinking? Quote
swhitey917 Posted December 6, 2011 Report Posted December 6, 2011 (edited) 4 mill, pro circuit pipes, stock carbs, modded air box with lid, K&N, bored .0030 wiseco's. head shaved .0030, running 94 oct 40:1, +4 timing A 290 is spot on at 70 degrees, if i ride around 30-40 degrees whats a good starting point to bump the jets to. 320-330 im thinking? I have always heard for every 15-20 degrees you change jet size so if you are spot on at 290 @ 70, I would start off trying 320's and do a plug chop and go from there. Edited December 6, 2011 by swhitey917 Quote
jlsparky7 Posted December 7, 2011 Author Report Posted December 7, 2011 Alright awesome. Thats what I was thinking. A couple more opinions would be great, placing an order this week. Quote
ginger Posted December 7, 2011 Report Posted December 7, 2011 i have 310s, but my motor isnt as modded as yours. Quote
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