2006 GS 500 making weird clinking noise matching revs

[Mr_Mack17]

Hello all,
I am pretty new to the bike scene and was told by a few good people to sign up on this forum. I've been poking around with great success and have solved a few problems with my bike already. I am having this problem with my bike now where it is making this rattling "clinking" noise when the bikes on sometimes. Other things I have noticed is on start up the bike wants to move forward a bit with the clutch fully pulled in, and it likes to stay at the lowest Idle possible. Any thoughts guys?

https://youtu.be/IDE87Yw_gDc

[qcbaker]

About the bike wanting to move forward with the clutch in, maybe your clutch is not properly adjusted. You can try to perform the 3-point clutch adjustment, the Wiki has some instructions: http://wiki.gstwins.com/index.php?n=Maintenance.AdjustClutch

Can't help you with the noise though, maybe someone more knowledgeable than me will be able to help there.

[Mr_Mack17]

Thank you for the info on the clutch adjustment info I assumed this problem matched the other one in some way since they both came up at the same time

[qcbaker]

And if you bike has a low idle, you can adjust that pretty easily as well, its the large screw located beneath the carbs. Wiki, again, has some instructions: http://wiki.gstwins.com/index.php?n=Maintenance.AdjustIdle

This is assuming that there is no other problem causing the low idle. If you can't set the idle properly using this method, that may indicate a problem with your carbs (vacuum leak, dirty pliot jet, etc).

EDIT: or is the low idle only occurring when you have the clutch pulled in? If that's the case, the low idle could be caused by the dragging clutch.

[Mr_Mack17]

I have my idle set properly, it wasn't until my bike started having this clink noise that the idle  began to lower. I will try adjusting the idle but I do not think that is going to fix the problem.

[qcbaker]

I have my idle set properly, it wasn't until my bike started having this clink noise that the idle  began to lower. I will try adjusting the idle but I do not think that is going to fix the problem.

If that's the case, maybe don't mess with the idle. Sort out the clink noise, then if your idle doesn't return to normal, adjust it with the screw. Like I said earlier, not sure what that noise could be though. Valves maybe? 

[Mr_Mack17]

I've looked at posts describing valves as the solution to this problems but its matching revs which makes me assume valves are not the answer.

[Watcher]

I've looked at posts describing valves as the solution to this problems but its matching revs which makes me assume valves are not the answer.

You have two valves per cylinder, and each opens and closes once for every two engine revolutions.
So if it's valve noise it WILL increase with RPMs.

Unless you took the cams out recently I doubt your timing is off.  Might be a good idea to check valve clearances.  Definitely sounds like top end noise to me.

[Mr_Mack17]

Gotcha I haven't messed with the cams at all, so I'll take the bike apart and look at the valves to see if that's what's causing the problems. Could it just be a simple adjustment? Bike died yesterday while testing it out

[mr72]

Could it just be a simple adjustment? Bike died yesterday while testing it out

If the valve clearances are out of spec it is not a simple adjustment at all. You adjust by replacing shims with another size shim until the correct clearance is obtained. It's a simple procedure but the devil is in acquiring the correct shims, which could result in the bike being apart for a week or two while you wait on parts.

Did the bike die just from low idle? Was it sitting idling on the center stand? Would it re-start? How long had it been running?

A bent valve would cause a top-end noise and also poor compression. In my bike bent valves caused it to die after it was fully warmed up, would only run if you can call it that over about 7K rpm and with that tons of backfiring on decel and didn't like anything less than half throttle. That makes a stop light very difficult and annoying. I seriously hope that is not what's wrong with yours. But my bike died dead while sitting on the stand at the shop as they were adjusting the carburetor only moments after they had pronounced it "fixed" and were putting the "final touches" on it before sending me home. Turns out "final touches" involved an $800 top-end engine rebuild.

[Joolstacho]

I don't know why people are bringing up valve clearances. Surely all the symptoms point directly to clutch?

[qcbaker]

I don't know why people are bringing up valve clearances. Surely all the symptoms point directly to clutch?

Well, I did suggest doing a 3 point clutch adjustment. I'm assuming that was done, but the noise persists.

[Atesz792]

Any loose bolts in there?

I once thought my engine was going to fall apart. Visited a mechanic in desperation, who sure found the source:
one of my bolts holding my luggage rack was missing, the other one was reeeeaaally loose and rattling around, matching engine revs with the noise. It was a frightening issue thankfully resolved for free.

[mr72]

I don't know why people are bringing up valve clearances. Surely all the symptoms point directly to clutch?

It definitely sounds like a clutch adjustment is warranted, but the clinking noise is unlikely to be the clutch AFAIK.

Probably two unrelated issues.

[Mr_Mack17]

Mr 72, was describing my problem pretty closely except it gets over 7k rpms. The bike wants to die if not being revd but stays on. It first died at a stoplifght then began to make the clicking noise. I'm checking he valves today. It sucks taking this whole thing apart haha.