Another won't rev past certain point thread.. - 600RR.net
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post #1 of 13 (permalink) Old 08-03-2014, 03:43 AM Thread Starter
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Question Another won't rev past certain point thread..

Hey guys,

2009 Cbr600rr w/ 12000 miles and just had the oil changed.

So I noticed on the freeway the other day I could get up to about 87mph but it would drop back down to 81 and refuse to go any faster all (Was in the middle of trying to get into carpool lane and get with the flow). Thats the same for 5th, 4th, and 3rd gear, I did some quick testing today for 2nd gear and it hit 7k rpm and literally stayed there at full throttle. I shifted up to 3rd and it did climb some but again refused to go past certain rpm points.

I've read and read the threads here and will be pulling the tank off this week.

Currently on the bike is a Power commander 5 (i swapped mapped with one off the website) and I do have a different than stock battery (i saw some say a lose connection could cause something) K&N Air filter.


So things to look at? Fuel pump? Injectors? Kinked fuel line? Spark plugs?


I've never taken the tank off or checked any of the items listed so I'll need to look on here for some DIY's.. but any info is always appreciated.
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post #2 of 13 (permalink) Old 08-03-2014, 10:34 AM Thread Starter
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I did want to add I am getting pretty crappy MPG too.
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post #3 of 13 (permalink) Old 08-03-2014, 03:08 PM
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My first guess would be at the power commander. If it simply wont rev but has no issues with misfiring or power up to that point i seriously doubt its a spark or fuel issue.

“Speed has never killed anyone. Suddenly becoming stationary, that's what gets you.” ― Jeremy Clarkson
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post #4 of 13 (permalink) Old 08-03-2014, 08:29 PM
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FWIW, about 3 years ago,

On my 09, had the bike go into limp mode after longer rides......and wouldn't rev......rode home about same way your bike sounds like it is riding currently.

MIL light threw a TPS sensor position code.....with laptop/DJ program hooked up to PC 5 checked throttle setting/position and could see it fluctuating erratically, and reading crummy values at closed throttle.

Removed pc 5 and ran bike w/o probs.

Sent my suspect PC5 to DJ.....asked for testing, (ask for express service =extra$ 35)
and they sent me a new PC5 on warranty and refunded the express service charge.

Last edited by tary preisser; 08-03-2014 at 08:30 PM. Reason: poor grammar!
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post #5 of 13 (permalink) Old 08-03-2014, 08:36 PM Thread Starter
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interesting! Okay I'll remove the PC5 and see.. Do I have to flash a stock map or when i remove it does it just go back to stock map?
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post #6 of 13 (permalink) Old 08-03-2014, 08:42 PM
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I would think your bike would run on the stock map since the OEM ECU would be controlling. Or are you asking about the pc5?

“Speed has never killed anyone. Suddenly becoming stationary, that's what gets you.” ― Jeremy Clarkson
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post #7 of 13 (permalink) Old 08-03-2014, 08:45 PM Thread Starter
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Quote:
Originally Posted by turbo-z View Post
I would think your bike would run on the stock map since the OEM ECU would be controlling. Or are you asking about the pc5?
I just wasn't thinking, I was questioning if the Pc5 was flashing the ECU a new map instead of just the Pc5 being flashed and changing the values. So yes I suppose removing Pc5 means ECU is running stock.
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post #8 of 13 (permalink) Old 08-04-2014, 11:03 AM
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you can run a "zero map" on the pc5.

be careful removing pc5 from harness, and be very careful not to pinch tubes when raising /lowering tank.....
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post #9 of 13 (permalink) Old 08-04-2014, 05:16 PM Thread Starter
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Quote:
Originally Posted by tary preisser View Post
you can run a "zero map" on the pc5.

be careful removing pc5 from harness, and be very careful not to pinch tubes when raising /lowering tank.....
I'll try out the zero map :)

Last edited by joshuaj84; 08-04-2014 at 06:30 PM.
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post #10 of 13 (permalink) Old 08-04-2014, 11:21 PM Thread Starter
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Zero'd the map and no luck, tore it apart today and pulled the battery (gel cell battery) and brought it over to honda motorcycle dealer and had them test it and they said its bad. So I have a new battery and oem air filter with some fuel injector cleaner going in tomorrow. We shall see what happens!
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post #11 of 13 (permalink) Old 08-04-2014, 11:43 PM
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It sort of sounds like the battery can't offer the volts needed at load (higher than x% throttle)
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post #12 of 13 (permalink) Old 08-06-2014, 12:09 AM Thread Starter
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Just wanted to close this out by saying it turned out to be a bad PC5, I removed that and went for a ride and issue was completely gone.
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post #13 of 13 (permalink) Old 08-06-2014, 12:50 AM
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Good to know!
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