GSX750F banging noise?

**sammcj** · 12th January 2010, 14:03

Originally Posted by MSTRS

Nah. Just wait.
unless the old oil is the cause

heh, Pretty unlikely I'd say unless someone dropped a ring in there when they last serviced it :P

**quickbuck** · 12th January 2010, 14:59

Okay. I would say it is the fact you are running a new chain on old sprockets.

The fact the noise goes away when you pull the clutch in is due to the front sprocket all of a sudden being driven, and not doing the driving.
They never wear on that side of the teeth, so it will still be new.

Replace all three, and if the problem still exists at least you have eliminated the problem of premature wear of the chain.

**sammcj** · 12th January 2010, 17:08

I just thought I better clear something up as this could swing the wrong way since I didn't give any background info in my first post - 200busa only said he thought it was the sprockets or chain, he is without question not a dodgy sort out to rip anyone off or the likes, he did say to me several times if I had any issues with the sprockets or fixing the issue to contact him and he'd help out / sort something out, I don't want anyone thinking his a bad guy or done a dodgy sale, He has been nothing but helpful since I first met him, this post was in no way a negitive post - I'm just trying to tackle this one myself or at least as far as I can!

Update:

I'm waiting on a mate to turn up to help me remove the front sprocket (back one is now on)
I've spun the front sprocket without the chain on it and it's as smooth as silk, no play, no rough bits etc...

I'll update again in an hour or three!

**MSTRS:Me** · 12th January 2010, 17:19

How many kms has that new chain done on the worn sprockets? More than a few hundred, and I'd be replacing it as well.
The problem is that the 3 parts (front, rear and chain) all wear together, and with any one part that is well worn and replaced, the new part is simply subjected to hugely accelerated wear by the other worn part/s. I've seen chains for instance, that should last 40,000+kms being rooted after 4,000. And that with a visually 'good' front sprocket.

**sammcj** · 12th January 2010, 17:22

Not too sure, it looks very new.

Thing is, chain is very expensive - the sprockets only cost me $70~ I'd rather replace the sprockets and note that the sound has gone away or lessened; then I will replace all three when the first thing wears out.
I've checked every link in the chain to issues and they all seem good.

**MSTRS:Me** · 12th January 2010, 17:36

Fine for what you are doing. Either you will solve the noise/vibration issue, or not.
Assuming you do fix it, and if the chain has done more than just 'a few' kms, then replace it quick smart. Otherwise you will be doing the sprockets again too. Real soon. Instead of enjoying many '000s of kms.

**quickbuck** · 12th January 2010, 17:51

Originally Posted by MSTRS

Fine for what you are doing. Either you will solve the noise/vibration issue, or not.
Assuming you do fix it, and if the chain has done more than just 'a few' kms, then replace it quick smart. Otherwise you will be doing the sprockets again too. Real soon. Instead of enjoying many '000s of kms.

Concur with this.... Thing is if you continue to wear the chain premaiurly, and the worst happens... you will have it at least take out your side cover, and may well take out your leg.... apparently those are worht more than a couple of hundred dollars.....

**Katman** · 12th January 2010, 17:52

Your problem may be due to the fact that you bought a Teapot instead of a Katana.

**98tls** · 12th January 2010, 18:16

Havent read all the posts so someone may have already suggested it,wondering if possibly a spring post or plate retainer in the clutch has come lose,not sure of the clearence between cover and plates in that model bike but thinking it could be rubbing on the cover when clutch is engaged.

**sammcj** · 12th January 2010, 19:39

w00t took her for a VERY short spin up the road carefully... looks like all the noise is gone and it's a lot nicer to gear!
I cannot confirm this yet, but I'm 95% sure.
While I've got all the covers off I'm doing and oil and filter change.

**CookMySock** · 12th January 2010, 21:14

So tell us what you changed, you gonk.

Steve

**sammcj** · 12th January 2010, 21:17

Originally Posted by DangerousBastard

So tell us what you changed, you gonk.

Steve

Both sprockets and cleaned chain thoroughly, front sprocket was actually a bit more f!@#ed than it appears in the photo!
I guess I was getting worried over nothing, I find it does pay to be prepared for the worst.

Never changed a sprocket before tonight either, what a newbie.

**CookMySock** · 13th January 2010, 06:51

Uh yeah I thought it looked kinda chewed. Good shit bro. Sorted! I'm glad it was something simple.

Steve

**shafty** · 13th January 2010, 07:23

Originally Posted by sammcj

Both sprockets and cleaned chain thoroughly, front sprocket was actually a bit more f!@#ed than it appears in the photo!
I guess I was getting worried over nothing, I find it does pay to be prepared for the worst.

Never changed a sprocket before tonight either, what a newbie.

Well done that Man!