I dropped by and described the issue to a tech. He seemed confident he could resolve the issue. Brought the bike in yesterday, and he starts heehawing that I'm blipping the throttle 3-500 rpms, and I'm trying to explain to him that it's just one of the manifestations of whatever the root cause is. Anyway, he said he'd have a look and contact Yamaha, but if they couldn't resolve it, then I'm on the hook for $90 diagnostic fee.That's just really weird. Good luck and post back what you find out!
Well, the stall is somewhat intermittent. I will try some carb cleaner to look for a leak, but not expecting anything from that. The problem is clearly worse the warmer the bike gets, and when the cooling fan kicks on and starts pumping hot air around my legs and bike's intake, then it is at its worst. That's why I think it's afr. Maybe unique to California model ecu.It actually sounds like you have a vacuum leak and a throttle body sync problem. There is a thread somewhere on the R6 forums about how to sync the throttle bodies yourself. If you can fix that, you might fix your stall issue but to me the PSHHT sound could be a vacuum line issue.
Today I entirely closed the idle air bypass screws (for the record, that was approx 1.35 turns clockwise), and set the idle to 1500 with just the throttle stop adjustment. Rode the bike 2 hours without any issues, and tried like crazy to get it to stumble at every stop light. Now, it's not 100F in summer yet, but this is clearly a tremendous improvement. I need to check cold start tomorrow (though "cold" is relative at 50F overnight lol).To be honest, I don't know much about the bike at all - I'm just drawing theory from basic engine knowledge. If we think about it logically - engine stalling while warm, and if you bump the idle, it doesn't do it. So that leads to the conclusion that there is something about the fuelling.
Maybe your ECU needs to be reflashed? What if its as simple as the ECU not handling the idle correctly? Grasping at straws here.
"There is essentially no difference in efficiency between the technique of bypassing the throttle butterfly and operating the butterfly itself. "So what's the idle air bypass for anyways? I'm guessing it's an emissions thing? It sounds like you've licked the problem with a workaround but clearly that isn't the way the bike is supposed to be setup. Will be interesting to see what happens though.
It's proper for the oil light to be on when the engine isn't running (because no oil pressure). Sounds like a possible fueling hiccup. I'd just keep riding, unless it starts happening with regularity. Maybe possible sign of an ailing fuel pump? Only time will tell.I was pulling into a parking lot in 2nd gear and my bike started to jump so I down shifted into first gear thinking I was going to slow in second causing it to jump but when I went into first gear, I had to clutch pulled in, and my bike shut off and my oil light came on. I parked and checked the oil level and to see if there were any oil leaks (Which was fine) and tried to start it again and it started right back up with no hesitation. any suggestions on what happened or what I should check?
How many miles are on the bike?I was at a stop light just chilling waiting for the light to turn green when all of a sudden the engine just died. As if I hit the cut off switch or something. I started it back up and off I went. I believe I read somewhere here that someone's engine cut out once when they were in motion. I tried searching but couldn't find that post.
Now that I think of it, the engine also refused to restart for me once after I shut it down to park it, then tried to restart it after a minute or so. Took me 4-5 tries before it fired back up. This hasn't happened again, but sometimes I feel like the engine does only barely start. As if the starter is geared too short or something.
Anybody else ever experience this kind of stuff? I have to be honest. My Honda never let me down even once. I've had the R3 for less than 2 weeks already have had two issues.