WV Sparky
XS650 Enthusiast
Hello folks, first post here but read a pile of posts which have helped solve many of my issues but I have one left that I can’t crack yet. 1978 xs650 bobber build that I bought about 80% complete 2 weeks ago. It has the Uni high flow filters on it, the untapered ones and a “straight pipe” true dual exhaust. Carb was just rebuilt 6 months ago with every gasket and jet replaced. That being said the bikes stalls to the point of unrideable immediately following a sharp crack of the wrist then picks up after probably 2-3 seconds of the carbs pulling air in. The diaphragms appear fine and passed the test I’ve seen guys do on them of plugging the hole and seeing if it plummets back to the carb or drops slow. So I replaced the gasket on the intakes, did the ole WD-40 test and that’s all cleared up now. Set the floats which were a tad off and adjusted the needle clip back to stock as it was at the lowest setting when I got the bike. I’ve cleaned the carbs meticulously twice now. Above 1/4 throttle the bike is pretty happy and revs out fine. Also the fuel air screw doesn’t make a difference at 3.5 turns out and does kill the bike when ran completely in. I’ll attach a pic of the new spark plugs and their condition after the most recent tuning episode. I appreciate any and all help guys thank you