Sorry NSR-Lover, that question is just too hard to answer. There is no "one size fits all" for jetting. What might work in your bike may suck in my bike. Best thing to do is a plug chop. Google it if you are not familiar with the process or check the tech section. That will give you a good idea of your mixture at 170/6th/10K. You typically run larger jets for pre-mix as the oil in the fuel creates a weaker mixture. If your bike has been converted for pre-mix, someone should have changed the jets accordingly. Pull the carbs to make sure.
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Andre E. Benguerel
1996 Honda NSR250R
Daijiro Kato/Fortuna Replica #74

2000 Honda RS250R (NX5)
2008 Honda RS250R (NXA)
AFM Expert #430


Last edited by andreb on Mon Jul 14, 2008 12:55 am; edited 1 time in total