Bike is a 92 CBR 600 with 17k.

Been on the forums browsing for a bit but finally making a post. I am new to motorcycles, but am reasonably mechanically competent. The bike runs good but when I try to shift it into gear it jerks a little and stalls. I have read a thread on this forum with a similar problem but didn't really understand the problem. I read it could be low fluid, cable needs to be adjusted, or bad clutch. I don't believe the clutch is gone, but it could be. I am looking for a place to start and how to go about doing that.

If anybody in the San Diego area would like to make a quick buck and help me out, that'd be much appreciated. Thanks in advance.

 

It sounds like your bike is actually going into gear, via the jerk. However it choking out sounds like the clutch isnt right. Is there play in the clutch lever? try adjusting it to make it tighter and see if you notice a difference. It sounds like the clutch either needs to be adjusted or its gone all together. Question: did this suddenly occur or is it something that started happening over time? maybe some of cbr 600 f1,f2.f3 guys could give you a little more insight. hope this helps

 

It certainly sounds like it's clutch related. Being that you're mechanically inclined I think it's certainly something that you can take care of yourself. By your description it sounds like the clutch is not disengaging when you pull in the clutch lever. This can be a poorly adjusted clutch cable, or one that is broken altogether. Taking off the lower right fairing will allow you to see the end where the clutch cable attaches. Watch it move as you squeeze on the clutch lever. Report back what you find.

I don't think it's a worn clutch as that would mean that the clutch would slip which is related to it engaging, not disengaging.

 

Just another quick update. It ran and drove about a month and a half ago but the clutch didnt engage until pretty far when releasing it. It start her up just to make sure everything was flowing right.

I just checked the clutch cable. Its clearly not broken. It only moves about 1/2" from where it sits naturally compared to when I squeeze the cable. I may give that a shot first and see what happens. Thanks for the input so far guys, its much appreciated.

 

thats probably your problem right there. Your clutch isnt fully disengaging. YOu should only have a slight amount of freeplay until the lever begins to pull the cable. A half inch is way to much freeplay, so the clutch is not disengaging.

Do you have the lock nut locked at the lever?

Also, if you have a way to lift the rear tire, via a rear stand, you could have the bike on the stand, and then put it in gear. With the rear tire off the ground, it will spin and stall the bike. that would clarify that it is indeed the clutch not disengaging.


Also, I've heard of stories where a bike has very dirt oil, the clutch can become stuck and not disengage. If your cable adjustment is correct, check the oil and make sure its not dirty.

 

Have been checking lately. Adjusted the cable with no luck. I now have the clutch assembly taken apart to check whats going on. Clutch looks great and the oil is very clean as well.

One thing I now remember though is that I dropped the bike on its left side at a stand still and hasn't shifted since then. Any suggestions on sensors that I could have set off or anything like that?

 

hey you cou;ld possibly have a short in your kickstand wiring, if the bike thinks the kickstand is down when u drop it into gear then it will just immediately stall check the wiring for that.

take the green/white wire and touch it to the frame of the bike or to the green wire, then just drop it into gear and if she stays running then that is your problem

 

I have heard that too. I bring the stand up and it shows it off on the cluster... I'll give that a shot though. Thanks man.

 

Not really any sensors that will prevent it. But, since it was on the left side, you could have bent your shifter linkage. Also, if the shifter pedal was pushed up, it could have skipped on the shifter shaft, and you may need to adjust it. If you follow the linkage, the other end has a clamp that clamps to the input shaft. Start off with that being parallel to the shifter lever.

Also, if the rod linkage is bent at all, you won't have the correct amount of travel and it won't shift.

Honestly, you don't even need the clutch to shift the bike, so I don't think your issue is with the clutch.

edit: maybe I'm misunderstanding.. The bike won't shift into any gear now? or is it still just stalling when you shift it into gear?

 

I have the whole assembly taken apart and the clutch and metal plates look brand new so I too don't think thats the problem. I have picked up a shift kit and a new stand switch (not too expensive). Thanks for these tips, I will make sure all is well when put back together.