K7 GSXR600 problem - help please?

[FiBee]

K7 GSXR600.... This is a random problem that seems to happen after a short ride, the bike is stopped and then is ridden again shortly afterwards (so the engine is still hot).

What happens: Between 4 and 4 1/2 grand (2nd & 3rd gear), the bike will suddenly pick up revs & speed (without any throttle movement) and then when I slightly back off the throttle to slow down (I'm talking about a mm of movement), it's complete engine braking & I can come to an instant stop.

Also, when I'm trying to be as smooth as possible around this rev range, it starts to sound like it's dropped a cylinder for a few secs, and has just recently started to 'jump' with the revs (kinda like doing bunny hops when you aren't trying!)

The only thing that seems to stop it for awhile, is if I hit the engine kill switch, coast for a few secs and then jump start it again.... then the engine runs smoothly from then, or the problem will start in again a few k's down the road. Otherwise, I just have to ride through the problem until it disappears.... which isn't fun through tight twisties, when my bike is either all or nothing.

I've taken it back and forward to the dealer/mechanics I bought it through, but they haven't been able to find anything on the plug-in fault reader & (of course), it hasn't happened to them whilst test riding it. I would start to think I was going crazy... but a friend took it for a test ride & confirmed it was happening & that it was blimmin dangerous.

Does anybody have any clue what it could be? Or any recommendations of good Suzuki mechanics in the Akld area? My mechanics have been awesome with trying to sort it out, but are hitting a wall with ideas.

:crybaby:

[Pussy]

The 750 has a similar idiosyncracy, an abrupt on/off tendency on the throttle at about 4000rpm. A way to minimise it is ALWAYS let the bike go through it's pre-start cycle i.e.. turn the key on, and wait for the tacho to do it's sweep, and for the speedo to come back to zero before pressing the starter button. Is yours a US or Aussie spec bike?

[discotex]

Does anybody have any clue what it could be? Or any recommendations of good Suzuki mechanics in the Akld area? My mechanics have been awesome with trying to sort it out, but are hitting a wall with ideas.

:crybaby:

It's still under warranty right? I'd just keep taking it back until it happens for them. Or you could try to get to the point you can cause it to happen then show them.

[Kendog]

I know what you are saying.

Have a look here (http://www.kiwibiker.co.nz/forums/showthread.php?t=50691)

[FiBee]

The 750 has a similar idiosyncracy, an abrupt on/off tendency on the throttle at about 4000rpm. A way to minimise it is ALWAYS let the bike go through it's pre-start cycle i.e.. turn the key on, and wait for the tacho to do it's sweep, and for the speedo to come back to zero before pressing the starter button. Is yours a US or Aussie spec bike?

Aussie spec & yep, I always wait for the pre-start cycle to finish. Does it happen randomly on the 750 as well, or is it a regular idiosyncracy? I've had 5% fuel increase on the plug-in Yoshi box, which seemed to help for awhile (took the problem away about 90% of the time), but after the last service & check, my throttle body valve things were re-aligned, so now the problem has started all over again.

[FiBee]

I know what you are saying.

Have a look here (http://www.kiwibiker.co.nz/forums/showthread.php?t=50691)

Awesome! Thanks Kendog - I'm shooting over to the mechanics now to show them this link
:D

[Sollyboy]

Does it bring up the FI fault light? These problems can be a shit to find especially if a sensor or component is failing within spec in which case the ecu will not pick it up

[Pussy]

Does it bring up the FI fault light? These problems can be a shit to find especially if a sensor or component is failing within spec in which case the ecu will not pick it up

No, it unfortunately doesn't. I'm bloody certain Suzuki know about this problem worldwide, and conveniently choose to ignore it. Kendog will probably tell you as well, that Suzuki have replaced the odd set of throttle bodies overseas. You would think they would be able to come up with a fix

[FiBee]

Does it bring up the FI fault light? These problems can be a shit to find especially if a sensor or component is failing within spec in which case the ecu will not pick it up

No, this particular problem doesn't bring up a fault light... but I had the F1 fault light a few weeks ago, which was sorted no problem because it showed up on the computer system (yay!).

Have the bike booked in at the dealership and have said I don't want it back again until it's sorted. Thanks to Kendog's link, the mechanics are happy they have a direction to go in and something to show Suzuki head honcho's... who apparently aren't too good at the customer service aspect of their job :argh:

Thanks for the feed-back though - much appreciated! :2thumbsup

[Kendog]

No, this particular problem doesn't bring up a fault light... but I had the F1 fault light a few weeks ago, which was sorted no problem because it showed up on the computer system (yay!).

Have the bike booked in at the dealership and have said I don't want it back again until it's sorted. Thanks to Kendog's link, the mechanics are happy they have a direction to go in and something to show Suzuki head honcho's... who apparently aren't too good at the customer service aspect of their job :argh:

Thanks for the feed-back though - much appreciated! :2thumbsup

Let me know how you get on. I am waiting to here what Suzuki NZ have to say to the Suzuki dealership here.

[{AUS}]

GSXR 600 throttle problem
Few of my friends have had this problem. It has worked for them. Hope it works for you
If you have had a flat battery lately or removed your battery cables, you may need to reset your throttle position censor. Follow these steps below without engine running
1)Remove the negative battery cable for about one minute then replace
2)Turn key on so ignition lights come on but don’t start the engine
3)Very slowly twist throttle grip all the way around until it stops
4)Now back off the throttle just as slow as step 3
5)Turn the key off, then back on .Now you can start your bike

[boomer]

the k7 thou had similar issues, check over at gixxer.com.

i've had my ecu and throttle bodies replaced under warranty