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I am trying to diagnose a strange new backfire/stumble issue i have
Specs:
1981 XS650 SH with
Ganzo Box ignition
BP7ES plugs
0.035" gaping
High output coil from Mikes
Carbs are well synced
Stock air boxes
Stock jetting (i believe)
Was running with no issue on a PAMCO before the Ganzo...
1978 XS650 with pod filters, straight pipes and bs38 Mikuni's. Just replaced pilot jets from stock 27.5 to 30, main jets from 135 to 140, upped the clip on the jet needle to the 2nd slot from the top, have the mixture screw out 2.25-2.5 turns and had the entire carb sonic bath cleaned.
Still...