Hyosung GT250R 2010 Weird Noise,Engine Off, Pushing forward

[dnasanders]

Hi guys,

Can anyone help point me in the right direction to figuring out what is causing this noise.

Sounds like a loud vibration noise.
Happens only when in neutral.
Happens when the Engine is off, or On (in neutral).
Does not happen when in gear (Engine Running).
Only happens when bike is rolling forward, but not all of the time.
Holding the clutch in when noise is happening doesn't make a difference.

I have managed to capture the sound on video, can be viewed here:
https://dnasanders.co.nz/HyosungNoise.mp4

Sounds like it is coming from the back wheel area.
I checked, sprockets and chain - not loose.
I can feel a vibration in the pillion bars when moving it.
The chain guard is not rubbing against the chain.
Why only in neutral?? Engine is off.

Thanks for any help.

Dan

[Taught2BCauti...]

Weird indeed!

Does it happen when you sit on it and scoot along?

If you have a centre stand, or can get the back wheel off the ground, does it happen then?

(Thinking it might have something to do with the position of the suspension or swing arm).

Is the chain too tight?

Try disconnecting the chain (maybe by undoing the front sprocket) and tying it out of the way, and try again. That should tell you if it is coming from the back wheel or not.

Check oil level. Any oil leaking from near the front sprocket shaft?
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www.TheFutureIsHere.eu

[dnasanders]

Thanks for your reply,
Yes, it happens when I sit on the bike and scoot along.
The chain is not too tight.
Oil level is fine.

I will try and disconnect the chain and set the bike up to test the back wheel.
Thanks.

Dan

[Taught2BCauti...]

If the noise goes away when the chain is disconnected, it will eliminate the rear wheel bearings and brake etc. but I would suggest that when you re-assemble, you check the rear wheel alignment and leave the chain with a little more slack than before.
____________________
Honda Varadero XL125(V8)
www.TheFutureIsHere.eu

[Ed Case]

[pepperami]

If it happens in neutral but not in gear, surely look at the gearbox or the clutch assembly?

Have the clutch plates warped?/worn out?
Is your back wheel evenly aligned ?
____________________
I am the sum total of my own existence, what went before makes me who I am now!

[dnasanders]

Hi there,

I have found what is causing the noise.
https://dnasanders.co.nz/HyosungBrake.mp4

It's the rear brake caliper.

The brake pads seem to have a lot of wear left in them, so don't think its worn brake pads.

I tried to take the caliper off, but the bolts were too tight to undo with my small allen key.

Playing around with it seems to have made it better, but I should really take it off and give it a good clean.

I checked the wheel alignment and it seems straight, I even counted the threads on the swing arm to make sure there were the same on each side.

Has anyone encountered this before?
Is there any other maintenance I can do in this area?

Cheers,
Dan

[pepperami]

I would suggest taking that caliper off and greasing the slider pins.
It looked a bit dry and dirty down there.

Might be a chance to look at that disc to see if it`s warped?


When you have the caliper off , check that the wheel does`nt make that noise.
If it does, then maybe wheel bearings?
____________________
I am the sum total of my own existence, what went before makes me who I am now!

[Rogerborg]

Ah, good find.

When you do get the caliper off, watch out for a spring clip escaping - I'd suspect that there's one in there that's come loose.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike