[F1ngers]

Hello everyone, I got a GSXR750 2004 that the revs increase when pulling in the clutch and I am banging my head against a wall.... please help. Ta

 

[Winchester Boy]

The smart guys should be along later.
I deleted the duplicate thread for you.

 

[F1ngers]

The smart guys should be along later.
I deleted the duplicate thread for you.

Thank you pal 🤛

 

[Winchester Boy]

Just to be clear, does the bike do this when it's in neutral?

 

[F1ngers]

Yes it does and still high in revs when a gear is selected

 

[airhead83]

I'm not one of the Smart Guys, by the way. Keep waiting. But, have you checked the slack in the clutch lever to be sure it's at proper adjustment? And insured there's no binding, top or bottom, at pivoting pieces attached to, and being moved by, the clutch cable? I doubt either would affect the RPM, but there may be a sensor somewhere in the system that looks for proper movement. Some motorcycles have a sensor in place, that is activated as the clutch lever is released,... to slightly raise the RPM to prevent stalling the engine. I don't know if your GSXR750 does, or not.. Just throwing it out there.

 

[F1ngers]

I am going to tear it down tonight and check again that the cable is properly routed, that was something that had crossed my mind.... other than that it’s a bit puzzling 🤔

 

[F1ngers]

Thank you by the way for your response pal👍

 

[F1ngers]

That’s my bike

 

[rv6john]

How much rpm increase are you seeing? I can hear a very slight engine change on my K6 750 clutch in vs out at idle in neutral. Maybe 50 rpm?

 

[F1ngers]

Increases by around 3-400 rpm🤔

 

[rv6john]

Increases by around 3-400 rpm🤔

That is a lot. I believe my small change is due to an ignition advance map change when I pull the clutch in and the clutch safety switch tells the ECM.

I would go with a cabling problem as others mentioned to start.

Move the bars all the way left and right and see if the rpms still rise.

 

[F1ngers]

That’s a good shout, thanks

 

[Spyder13]

Yeah, my bet is the clutch cable is encountering the throttle cable somewhere, and the tension is tweaking the throttle a bit. Try what John said, turn it all the way left, see if it still does it, or at least changes, then do the same for turned all the way right. If one way or the other make it stop, chase down the routing of the clutch cable, and correct it.

 

[F1ngers]

Thank you guys, I really appreciate your help.. didn’t get to look at her tonight, busy etc... but tomorrow I have a free evening, so I will try all your suggestions tomorrow and let you know the results....fingers crossed 🥴👍👍👍

 

[Chuckster]

I guess there could be drag on the countershaft, but highly unlikely.

 

[F1ngers]

It’s a thought......I did install an STM slipper clutch, but surely that wouldn’t cause it! Would it??

I may have a cable routed wrong or caught up, either way I will investigate tomorrow...

 

[F1ngers]

I built the bike from scratch to what it is now so there was a lot of work that I done, so I hope it is a cable issue, would be cheaper to solve 👍👍👍

 

[F1ngers]

unbelievable guys but glad to say I have solved the issue, it was all caused believe it or not by my fast idle not being set up correctly, now that’s all spot on the problem is solved👍👍👍👍. A BIG thank you to all that took time to try and help me, can’t thank you all enough, stay safe 🤝 joe

 

[rv6john]

So was the STVA (with the fast idle cam on the end) moving when the clutch was pulled back and released?