bad noise at counter sprocket, not chain or sprockets

[JoneZ]

f me hey guys, I picked up a salvaged bike, put it all fkn together and now I ran into this issue .. was in a front end crash, forks were hardly bent, didn't think it was that serious till now .. it has to be something stupid, it's driving me nuts

some info;
Neutral, no sound
In gear, at idle = bad noise
bad noise only at idle, in any gear, worse the higher the gear
when throttle applied, goes away, problem only at idle in gear

2011 gsxr 750 don't laugh at me removing the clutch push rod

Could it somehow be a clutch issue? I really don't want to split the motor, I just got done checking the valve clearance, I suspect 5-10k miles, had a 520 conversion kit, the issue is a result of a crash, the chain just jumps all over the place


youtu.be/ZT5O4s1umQ4

 

[Lex Talionis]

The only advice I can offer, not being familiar with your motor, is to use a "mechanic's stethoscope" to localize the noise in your motor to better describe your problem. That should emphasize a clutch problem, or rule it out. Then proceed with asking for recommendations.

As an aside: My favorite e.e. cummings quote is:
one's not twice two
two are halves of one

Lex

 

[mototireguy]

Clutch basket is on the right (other) side?

The front sprocket floats on the output shaft splines. Could just be the front sprocket floating when not under load?

 

[JoneZ]

Clutch basket is on the right (other) side?

The front sprocket floats on the output shaft splines. Could just be the front sprocket floating when not under load?

floats? the issue happens under load, I know the output shaft has a bearing but I dont think that's it, ill take off front sprocket tomorrow and dig some more, thanks for replies, it feels good to bounce ideas with people I think my gf is sick of me lol

 

[anytwowilldo]

f me hey guys, I picked up a salvaged bike, put it all fkn together and now I ran into this issue .. was in a front end crash, forks were hardly bent, didn't think it was that serious till now .. it has to be something stupid, it's driving me nuts

some info;
Neutral, no sound
In gear, at idle = bad noise
bad noise only at idle, in any gear, worse the higher the gear
when throttle applied, goes away, problem only at idle in gear

2011 gsxr 750 don't laugh at me removing the clutch push rod

Could it somehow be a clutch issue? I really don't want to split the motor, I just got done checking the valve clearance, I suspect 5-10k miles, had a 520 conversion kit, the issue is a result of a crash, the chain just jumps all over the place


youtu.be/ZT5O4s1umQ4

What do you mean by "the chain jumps all over the place?"

 

[JoneZ]

youtu.be/6myCHsJFV6I

 

[JoneZ]

I'm fucked and have to split the case huh, took off front sprocket same noise

sounds like it's com u ng from the worm, little above and to the right of the spline, I'm just wondering if a clutch could play into this at all ? clutch / transmission = lost to me, no experience wondering if the shift basketing is putting on funky weight to something making this noise ? more like praying it's something like that

 

[EastBayDave]

you can get dozens of "noises" from various things. Don't be so quick to jump on splitting the cases. I was just discussing the same thing w/a 96' GPz1100 guy yesterday, & it turned out to be a small roller bearing fell out of the starter that had become loose @ 121K miles.

It took him months of disassembling & reassembling to find it. Only made noise while riding around town at low speed (low noise) for him to finally find it. He "assumed" it was NOT the starter as it is working (starting the bike.) Was pretty miffed it was caused by a little pencil head sized bearing.

I would be a little more investigative before splitting the cases. Get some help & get one of those "noise headphones" you can put on the running engine to localize the noise. Get several MORE opinions so you can minimize the experiences of a bunch of us, instead of just a few...

Good luck! :thumbup

 

[dowlinginchico]

YES! What Dave said! Take your time. Don't assume it is because of the previous crash. Take a screwdriver and put it up to your year while touching different parts/cases on the bike (it sometimes works). Start with the easy stuff, then work your way up to harder stuff. Change the oil and look for chunks. Push and pull on things looking for sloppy bearings. Take covers off that might rattle. Look in the clutch case, take out steels and friction disks and see if the clutch basket shaft bearings are sloppy.

There is a good chance that if you split the case, you may not find anything. And that is a GOOD start to a project that doesn't get finished. Trust me.

 

[JoneZ]

ahhh good stuff thank you guys for the backup, ill check into the clutch side and see if I can't find anything in there along with localizing the sound more

I'm going to find it, ive been studying schematics and manuel book, just hard to picture that area in mechanical sense to me

it baffles me if the previous owner rode it like that, I highly doubt it and my thought process keeps thinking it was the wreck but I'm keeping an open mind

 

[JoneZ]

k guys, i think i found something, this isn't normal right? Clutch basket doesn't move no matter what I do with the push rod


youtu.be/sI-v6wLw9KI

 

[Enchanter]

k guys, i think i found something, this isn't normal right? Clutch basket doesn't move no matter what I do with the push rod

You cannot see or touch the clutch basket thru that hole. You are touching the hub, and it's not going to move with finger pressure. Was chain tension adjusted correctly?

You don't need to split the cases to look at the clutch. Just remove the clutch cover (drain the oil first). Looking at the drained the oil may provide a clue too.

It's fairly rare, but one of the clutch plates could be broken. They are super easy to check / change.

 

[injun]

With the slave on the bike move the clutch lever through it's full travel while looking at the pressure plate with the engine stopped and running, I bet you will find out what the problem is.:thumbup

 

[dowlinginchico]

With the slave on the bike move the clutch lever through it's full travel while looking at the pressure plate with the engine stopped and running, I bet you will find out what the problem is.:thumbup

Look at the pressure plate while engine is running? Sounds messy, and oily.

But I would put the slave back on the bike to help diagnose the issue. Good point, when taken in context.

EDIT: My Ducati is MUCH quite er with the clutch pulled in (in neutral). It gets clacky with clutch lever out. I think it has something to do with a sort of ramp that helps apply more pressure (on top of the spring pressure from the 5 or 6 pressure plate springs) to the clutch plates when the engine is under load. Don't let this guide your direction. It is just a thought to keep in mind.

 

[JoneZ]

I took the clutch apart and the basket has a bunch of play, but not sure if I'm headed in the right direction, the noise came heavily from the counter sprocket side

but play in the basket is not good right? I'd say about 1/8 inch or more

halfway tempted to take it to a shop for more of an opinion

 

[byke]

Vertical play is bad, but you will have some play along the shaft. So far I'm leaning towards thinking that there's nothing wrong with your bike.

 

[JoneZ]

it's vertical and 100% something is wrong, it sounds like a bearing somewhere

the bike vibrates hard cause of this, only in gear and idle, there's a bearing on that clutch basket but I'm not sure that's it

 

[dowlinginchico]

it's vertical

:wow

Sell it while you don't have to disclose as much.

 

[dowlinginchico]

Take the clutch cover off. But drain oil first though, or lean bike on its side w/ clutch cover up. Look for metal chunks in likely low spots in the case. Loosen the 5 or 6 bolts that are holding the springs back. take off pressure plate and remove the steels and friction disks. This will allow you to check the clutch basket and spline independently. Put in neutral and rotate both back and forth.
Any grittiness like shattered bearings or metal pieces?
any chunks of metal in the case below the clutch basket?
Which one has excessive VERTICAL play(clutch spline or basket)?

 

[JoneZ]

I've taken the pressure springs offs, clutch plates, no oil in bike, I can shake the basket and watch the big gear behind that wobble just a little along with basket, maybe 1/16th of an inch to be honest, very small play but it's there, I've inspected for metal parts as well in the oil and low side of the motor and can't find any but it was a minor search

my buddy recommended a good little shop I'll take it to tomorrow, don't feel like buying the basket holder