2006 S2R1000 with about 30800 miles.
Daily rider, gearing has 80MPH at right at 5000rpm in 6th. Today on the way to work, 6th had 5000rpm at about 72-73MPH. This happened about halfway through my ride. Not that it suddenly jumped, but slowing down and speeding back up about halfway to work I noticed the change. Almost seemed like I was missing 6th, even though I was in it already. Got to work and the bike is idling at around 2000rpm.
Any ideas?
At idle, does it sound like it is idling at 2000? The tach may be indicating the wrong RPM if nothing else changed.
The only other ways that I can think of for RPM-speed to change mid-ride is clutch slip or speedo error. add that to the change in indicated idle speed...
It definitely sounds like it's idling high and sounded appropriately high at 80MPH as well...
After key on, and gauges sweep, does tach return to zero?
Yes.
Sounds like an intake air leak.
Your motor has the ECU controlled idle air valve, it may have given up, or gotten stuck full open or the like.
Or one of it's hoses has come off/failed.
Or a leak elsewhere.
Quote from: Speeddog on February 03, 2015, 10:24:56 AM
Sounds like an intake air leak.
Your motor has the ECU controlled idle air valve, it may have given up, or gotten stuck full open or the like.
Or one of it's hoses has come off/failed.
Or a leak elsewhere.
I understand how that could affect the idle, but woulf that affect RPM at speed?
I don't think the high idle would affect the speed differential. Maybe clutch slipping or VERY low tire pressure; but I'm sure you would have noticed that. What about other gears? Were you having to constantly ride at higher RPM?
Other gears seem proportionately high, as if I was completely missing a gear, even though I shifted through all six...
Oh, and tire pressure is checked daily and is around 32-33 front and 33-34 rear.
Quote from: NAKID on February 03, 2015, 10:46:28 AM
I understand how that could affect the idle, but woulf that affect RPM at speed?
Wouldn't effect rpm at speed.
Check the clutch, with bike rolling under moderate throttle, ideally going up a hill, fan the clutch quickly and see if it brings the rpm back down solidly when the clutch engages.
Quote from: Speeddog on February 03, 2015, 11:12:59 AM
Wouldn't effect rpm at speed.
Check the clutch, with bike rolling under moderate throttle, ideally going up a hill, fan the clutch quickly and see if it brings the rpm back down solidly when the clutch engages.
I'll check that when I head home.
just went out to the bike and started it up. Idling right about 1100-1200rpm now even after about 5 mins. Didn't find any air leaks, cracked hoses, etc. We'll see how it performs on the way home.
BTW, (Nick you already know this) but this is a stock, original clutch fully open, if that makes a difference.
I wouldn't be surprised if it were just a glitch with your gauges. (The high idle may have been more of a perception because of what the tach was indicating rather than what was actually going on). I had something similar happen with mine. Turned the bike off, turned the key and let the gauges sweep, started the bike, no more problem.
I was able to re-create the problem once when I hit the start button before letting the gauges make their full sweep.
Hopefully it's nothing. Good luck.
Quote from: rule62 on February 03, 2015, 02:43:46 PM
I wouldn't be surprised if it were just a glitch with your gauges. (The high idle may have been more of a perception because of what the tach was indicating rather than what was actually going on). I had something similar happen with mine. Turned the bike off, turned the key and let the gauges sweep, started the bike, no more problem.
I was able to re-create the problem once when I hit the start button before letting the gauges make their full sweep.
Hopefully it's nothing. Good luck.
Thanks Ryan. I did just that when I got to work. Shut the bike off. Turned the key to the on position and let the guages sweep. Restarted the bike. High (~2k) idle.
But, like I said, bike is idling normally now.
We'll see on the ride home...
Rode home and back to work today with none of the problems I encountered yesterday....
Possible explanation of the lower speed at same RPM, maybe the clutch lever needs adjusting as the plunger is too far out allowing slight clutch slippage? But this doesn't address the high idle. Just a thought.
Were you on a treadmill?
I tried what Nick recommended regarding feathering the clutch at moderate throttle and had immediate obvious clutch disengagement.
No problems on the way home yesterday either...
So I'd like to revisit this as something similar has happened a few times since. And, based on the repeat oddities, I've determined that it was a malfunction of the speedometer.
Lately, when I start the bike in the morning, it has been taking a bit longer to start and the speedo sweeps randomly while cranking. The bike is garaged and the temps have varied between mid 40s and 50s.
The other day while riding I noticed the the speedo was a few MPH off in 6th gear (reading ~75mph at 5k rpm, normal is 80mph at 5k). So, on an open area of the freeway, I pulled in the clutch, shut the bike off with the key, turned it back to the on position and restarted. When I got the bike back up to 5k, the speedo was reading normally again.
Any idea what's up???
Well, I had the gauges replaced on mine under warranty as the needles stopped working correctly and would read lower than it actually was. But mine was repeatable and I believe it was on the RPM gauge, I can't guarantee though it was so long ago. It sounds like that is the case and I believe there used to be a thread about repairing them.
Mine is intermittent and not repeatable. Also, bike is well out of warranty...
If repairing them isn't an option, a replacement set is next best thing but you have to have it recoded by dealer/service center. Something from motogadget could also be used but I'm not sure on the details of disabling the immobilizer or what else is needed.
Flash the computer, kill the immobilizer. Then you can go used or aftermarket gauges.
May eventually get to that point Howie, but can't justify that kinda money just yet...