GSX-R600 K9 losing power when cruising

**jamjam** · 9th December 2010, 18:53

I got an 09 gixxer 600 and it's started having issues when cruising. Not all the time but a few times i've been cruising around 4 - 6 krpm in any gear and it will slowly lose power. If I slowly add more throttle it will get to a certain point (such as about 20% twist of the wrist) then it will suddenly power on.... pretty much instant power! Then if i go back to cruising revs it will do it again. It seems to be intermittent. Anyone got any ideas? a quick google seemed to point to the throttle position sensor as a possibility... sound like something someone seen before? It's still under dealer warranty and only done 5,000km.

**Sensei** · 9th December 2010, 19:45

Take it back to the dealer & get them to sort it out .

**Banditbandit** · 10th December 2010, 10:33

Originally Posted by Sensei

Take it back to the dealer & get them to sort it out .

I agree ... this is most likely an issue in the systems which get the fuel into the combustion chambers .. I understand carbs ... a fuel-injection system needs professional attention ...

**avgas** · 10th December 2010, 10:55

replace the powerband.

**slofox** · 10th December 2010, 11:02

Originally Posted by jamjam

I got an 09 gixxer 600 and it's started having issues when cruising. Not all the time but a few times i've been cruising around 4 - 6 krpm in any gear and it will slowly lose power. If I slowly add more throttle it will get to a certain point (such as about 20% twist of the wrist) then it will suddenly power on.... pretty much instant power! Then if i go back to cruising revs it will do it again. It seems to be intermittent. Anyone got any ideas? a quick google seemed to point to the throttle position sensor as a possibility... sound like something someone seen before? It's still under dealer warranty and only done 5,000km.

Well, funny innit? I have the same problemo with my K8. Except that it is a very rare happening. But it does happen from time to time. And yes, usually just under 4000rpm.

If you really crank the throttle open when it starts, you'll mostly get rid of it. If you sloooowwwwwly open throttle, it does as you say - suddenly grabs a handful.

I'll get Boyds to have a look next time it's in the shop...

**ellipsis** · 10th December 2010, 11:07

Originally Posted by avgas

replace the powerband.

....i dont think there will be any around 'til after xmas....

**nodrog:Me** · 10th December 2010, 11:29

Take your foot of the brake.

Fanny.

**avgas** · 10th December 2010, 11:51

Originally Posted by CAMSec

....i dont think there will be any around 'til after xmas....

May be he could use a wide one off a tractor?

**MSTRS:Me** · 10th December 2010, 12:03

Most, but not all, faults that could cause those symptoms will be monitored and return an error code. If you are not getting any hint on the dash (ie FI flashing), I'd suggest looking at the TPS. I had a similar problem on my Srad and that's what it turned out to be. The TPS is not monitored.

**jamjam** · 10th December 2010, 13:42

yeh slofox is right.. if i slowly wind it on when i notice it bogging down then it will suddenly snap on a whole lotta power, whereas if it starts to bog down and i give it a semi good twist then it gets over the problem more seamless.... oh yeh better make sure my foot aint on the brake!! haha ... bike shop fully booked today but got it booked for wednesday to get looked at. Suspiscion from mechanic could be TPS aswell but he'll do the diagnostics checks etc to confirm that.

doin hampton downs next saturday so hopefully she all good for that :-)

**slofox** · 10th December 2010, 15:01

Have a read of THIS...

We are not alone...

**firefighter** · 10th December 2010, 15:10

Mines an older bike but similar kind of issue when accelerating from stopped....A really slow dull acceleration then everything at once.

This sorted that out and it's much smoother now;

http://www.amcmotorcycles.com/contents/en-uk/p9773.html

**jamjam** · 17th December 2010, 10:05

Got the bike back from mechanic... turned out to be the exhaust actuator thingy flux capacitor stuff. Bike got it's power back now. I also noticed it has a more smoother exhaust note again which i hadn't really noticed it had gone because it was progressive but now it brings back memories of how it originally sounded... going much better now :-).... way better than the GS500 i had as a loaner.... what a heap that was!!! credit due to mechanix at Holeshot for putting in the commitment and effort to getting the bike sorted.

**jamjam** · 24th January 2011, 16:26

Well the bike started playing up again with the same symptom. Put it back to Holeshot and two of their mechanics test rode it but couldn't find a fault. Riding into work this morning it did it again! I tried to explain to them that you can't just go for a blat up the road and get the problem. You need to be at crusing revs consistantly for a while (say 15 mins) before it starts doing it.

It will just start to lose power so you twist on more throttle slowly and it will continue to bog down then about 30 - 50% throttle and BAM she powers on like flicking a switch... it's a very snappy power gain, not just a steady increase. Then continue to cruise along and it will do it again. I also noticed on a hot day it will generate more heat around my feet just before it does it. Although this morning was cooler, raining and windy and it still did it, just not as much heat generated. But temp was up around mid 90's which should have been more like mid 80's today.

So has anyone come across this symptom? Is it the set valve jamming then releasing, injector issue etc... no F1 light comes on but the mechanic said the first time bike was in he had the F1 fault code on the tester. This time round i think they just don't believe me that the symptom exists and did the old speech on sport bike revs and power band bullshit which i've owned enough bikes to know about so i know this is a fault occuring and not my imagination or by design. I'm all ready to remove the set valve myself but since i don't get the F1 light i'm hesitant as to whether it will really fix it or not. I just want to know if anyone else has come across this symptom.