u/Atxbarber86

Mikuni BST-40, Mikuni 6F19 w/ clip at third position with stock (round) white spacer underneath. Stock slide. 42.5/ 140 jetting. Stock uncut airbox with Twin Air filter. FMF Q4. Air/fuel mixture set to 1.75 turns out. Idling at just over 1500 RPM with bike at operating temp. Throttle response is good off idle and bike returns to idle almost instantly. The bike feels sluggish and plugs look very sooty. No fuel in airbox, so I don’t think it’s the float assembly O-rings. The valves are in spec. Less than 4,000 miles on the bike. I’m at 500 ft. above sea level, about 85 degrees out. Anyone have a similar setup, at similar elevation? If so, how many turns out are you on air/fuel mixture? Got so tired of fiddling with it I’ve just been riding my V-strom.

Recently purchased a 2011 V-Strom 650, which currently has 17,400 miles on it. Not sure of the maintenance history, other than a new air filter and coolant flush, which I performed (coolant is fresh). The question is, considering the recommended valve inspection interval is 14,500 miles, is it dire that I do valve inspection, or am I okay for a while? How many Gen 1 650 owners found the valves needing adjustment upon first inspection/at this mileage? I know that after the first one or two adjustments they tend to stay within specification for many thousands of miles.

BST-40 w/ 42.5 pilot/140 main jet, JD jet kit red needle w/ clip at 3rd position with plastic spacer under it, FMF Q4 slip-on exhaust, Twin Air filter, stock uncut airbox, sea level. How many turns air/fuel screw? Right now it’s between 1.75 to 2 turns out. Haven’t checked plugs. Wondering if anyone has a similar setup or thoughts. Also curious if it makes sense to remove the snorkel and put in a 145 main or leave as is. Generally ride at ~500 feet above sea level, 50 to 100 degrees Fahrenheit. Thanks