RPM's hanging up/ lack of engine braking : Honda CBR 600RR Sportbike Forum : 600RR.Net

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Old 09-01-2010, 11:57 AM   #1
Slickrick592
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RPM's hanging up/ lack of engine braking "Now w/ Video"

My 07 600rr has been having an issue of hanging up sometimes. more noticeable when its hotter out but it still doesn't do it all the time. no FI light. no modifications. 34K miles on it. suggestions? things to check or look for?
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Last edited by Slickrick592; 09-14-2010 at 08:24 AM. Reason: added videos
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Old 09-01-2010, 12:09 PM   #2
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What is this hanging up? Need more details.
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Old 09-01-2010, 01:08 PM   #3
Slickrick592
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by hanging up i mean that i let off the throttle and the rpms stay about the same and very very slowly come down. and there is no engine braking at all. i've checked to see if the cable is binding and its not. if i pull in the clutch the rpms drop right back to idle, revs just fine. i can try to get a video of it if need be but its always kinda hit or miss. sometimes as it slowly comes back down i'll feel the engine braking kick in and out a bit like it'll kinda hiccup.
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Old 09-01-2010, 01:25 PM   #4
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To much oil?
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Old 09-01-2010, 01:31 PM   #5
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doubtful, its been doing this on and off for months.
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Old 09-01-2010, 03:25 PM   #6
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When you turn the throttle to WOT, does it snap back to full closed with no resistance?
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Old 09-01-2010, 03:26 PM   #7
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yes the throttle snaps back without resistance as it should
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Old 09-01-2010, 03:31 PM   #8
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Are you in a high or low gear when this happens? All maintenance has been done like checking valve clearance, etc?
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Old 09-01-2010, 04:11 PM   #9
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it happens in all gears

i'm due to check the valves again but they were good at 15k and i've been keeping up with all maintenance
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Old 09-14-2010, 08:33 AM   #10
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bike finally started doing it again yesterday and i was able to get a few videos. not the greatest vids but you can hear what the bike is doing and you can see the tach as well. i took 3 small vidoes. some show the problem better than others but heres the links.....any new ideas?


http://s4.photobucket.com/albums/y13...t=IMG_0367.mp4

http://s4.photobucket.com/albums/y13...t=IMG_0366.mp4

http://s4.photobucket.com/albums/y13...t=IMG_0369.mp4
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Old 09-14-2010, 01:07 PM   #11
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You haven't changed the gearing on the bike? What gear were you in when filming?
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Old 09-14-2010, 02:08 PM   #12
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it happens in all gears, 2 of those videos where in a higher gear and the one was in a parking lot

and i jumped to an assumption you meant gears 1-6 but the bike is regeared +1/-1 i forgot to mention that
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Old 09-14-2010, 02:12 PM   #13
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Well, engine braking works differently depending on the speed and the gear you're in. Yeah, the RPM's are hanging, but hard to know by how much without knowing the speed and gear, or if the gear ratio was changed.
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Old 09-14-2010, 02:22 PM   #14
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ok well why is it that it only does it from time to time? like i sat in traffic yesterday and during down shifting and slowing and stopping it was doing it and engine braking was nonexsistent and then later that day doing the same exact thing it was fine? i understand that the amount of braking will be different but in the vidoes posted it is not there at all.
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Old 09-14-2010, 02:31 PM   #15
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vaccume leak?
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Old 09-14-2010, 02:35 PM   #16
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this is a pretty unique problem... wish I could provide some insight. Im thinking its a sensor going bad... good luck
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Old 09-14-2010, 02:39 PM   #17
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That's what's hard to figure out without knowing all of the factors. Only thing I can think of without more info is that the PAIR valve is being stuck fully open.
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Old 09-14-2010, 03:25 PM   #18
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i'm gonna pull the tank hopefully this weekend and check all the hose's and the pair valve. i thought pair initially but then wasn't so sure because of it only doing it during hotter days. i'll let you guys know what i find
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Old 09-18-2010, 07:08 PM   #19
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I am having this same issue with my bike. 07 600rr. Still can not find what the problem is.
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Old 04-19-2011, 01:19 PM   #20
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I have the same exact problem with my bike- 2007 cbr600rr any body fix this yet?
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Old 04-19-2011, 04:48 PM   #21
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Well thought i had it fixed. tucked the PCIII wires up under the tank so that they were not picking up any voltage from ant power wires. Worked for about 4 rides worth and its back again. This time it happened when I stopped to fill up for gas.... then it went away once my fel level got down to about 3/4 full?!? No idea now. Help please.
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Old 04-19-2011, 05:15 PM   #22
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Is your FI light on when it has this problem?
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Old 04-19-2011, 06:03 PM   #23
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i have the same issue, 06 600rr 25k km, does it in bad weather conditions only, (dusty, hot, humid, etc), after riding for at least half an hour

top speed becomes 110kph in sixth gear

stock, just slip on

i read on one of the threads that it cud hav to do with the tcp (throttle body) sensor

when on neutral, revving the engine at first would feel normal, but after a while rpm wud reach 10k nd then max at 7k
kill engine and switch bike on right after and it revs to 15k normally, which IMO could suggest that it is a sensor not a mechanical issue

bike is at a local bike shop, checking my injectors

i sent it to honda for service and they told me it was perfectly fine, idiots...

hope we find a solution to this issue
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Old 04-19-2011, 09:51 PM   #24
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no idiot lights. PCIII reads 0% throttle position.
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Old 04-20-2011, 09:53 AM   #25
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Do you guys want to create your own threads, and describe exactly what your symptoms are... makes it a LOT easier to keep track of the various issues people are having :)
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Old 07-27-2011, 10:09 AM   #26
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I am havin the same issue, anyone every figure this out??
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Old 04-06-2012, 01:59 PM   #27
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I am still having the issue from time to time and have not found a good solution yet. I was planning on doing a tear down here soon for maintenace again as i'm at about 45k now and want to check the valves again. I'm thinking i might block off the Pair system. There is NO FI light on at all when this happens but it really only happens during warmer days 75+ and its not every time but its a pretty regualr occurance. i've also noticed it sometimes happens after i'll restart the bike after running into a store real quick. sometimes it goes away on its own and others it just never goes away until after it fully cools down.
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Old 04-06-2012, 02:02 PM   #28
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I resolved the issue by replacing the throttle body. Apparently the guy who had it before me messed with the fuel ratio screws on the throttle body. Inside each valve there is a screw that adjust the amount of fuel and air I believe and that jacked up the idle on the bike. After I replaced it, it has run like a champ for over a year!
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Old 04-06-2012, 02:03 PM   #29
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Or it was a bad IACV. I checked it also but couldn't get any different results. Afterwards I was able to get one on ebay for $75
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Old 04-06-2012, 02:37 PM   #30
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I am the only owner of my bike since brand new out of the crate. and i have never messed with anything on the throttle bodies.
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