Looking for suggestions. So I took my SP1 out after doing a lot of work over the Winter. I had almost completely drained the tank of fuel over the Winter. I put 2 gallons of 93 oct in and drove about 20 miles with no issue. I dropped it off at the shop for new tires. Needed wheel bearings too so I got that done. I picked up my bike and it stalled in the parking lot. Took a few tries and it started. It stalled at a light when I kicked it into 1st gear. I hit the highway and noticed it jerked a few times on me (when I say jerk, it was like I was at low idle in too high of a gear and tried to pull the throttle). It happened quick but during a corner.
It happened again last night. I was easing along, 2nd gear maybe 4-5k rpm and it jerked, kicked into 3rd and it happened again. I parked for a bit, then went home and it did it once more in 2nd gear. Maybe around 3500 rpm.
I'm not sure what it is or what to try first. It has new spark plugs, it has a power commander but I have not tuned it (prior owner installed). I saw someone mentioned checking a fuel diaphragm. Someone said it was bad gas. I did a pair valve mod and a flapper mod over the winter as well as new air filters and new throttle cables. It doesn't give me rider confidence much right now...
I'm pretty sure my throttle hand was 100% steady and it happens once when slowly rolling on it last night but could it be that I don't have enough throttle play?
Ok this might sound crazy but I have had the exact same issue it would come and go pretty much every time you got a random bump big or little might not bother it but then just hitting a bridge translation anyways I am slightly crazy and am a firm believer in reproducing the problem to figure out what is going on. Up on the front left wiring harness next time it does that wiggle the thick wires sp1 wire chafe and that was my problem hope this helps