Rattling noise when throttle open

Jayyyxxx11 · Mar 19, 2019

Fine at tick over or when letting off
Kind of hard to find culprit as I can’t get off and run along side it to find where the noise is coming from
I can rev out of gear and the noise is not present either.
Don’t know whether they’re linked but, it is hard to find neutral, like unable to find at all until cold.
Thanks

RogerB39 · Mar 19, 2019

If it's only when moving and in gear, I'd check the chain and/or front counter sprocket.
Check the chain slider on the swing arm as well.

Jayyyxxx11 · Mar 19, 2019

RogerB39 said:
If it's only when moving and in gear, I'd check the chain and/or front counter sprocket.
Check the chain slider on the swing arm as well.

Thanks, il have a look
Although, it’s a bit more high pitch then a clunking noise which leads me to think it’s something small

RogerB39 · Mar 19, 2019

If it seems more pronounced on the right side of the engine, maybe pull the clutch cover off and make sure nothing is loose in there.
(lay the bike on its side to prevent oil spilling out of the engine when you take the cover off)

Jayyyxxx11 · Mar 20, 2019

I've got a feeling it's more carb related, although it runs like a dream

Taffy · Mar 25, 2019

year and carb?

Taffy

Jayyyxxx11 · Mar 25, 2019

Taffy said:
year and carb?

Taffy

Hi Taff 2004 fcr 41

Taffy · Mar 25, 2019

the carb can make a 'clucking' noise at idle. this is the throttle plate on the backface of the carb slide.

as has been said, the final drive chain will clatter against the inside of the frame. many people don't know the correct way to adjust the chain. i lean my chest on the seat and feel for the chain tension over the seat. at fully compressed you want about 15mm movement in and around the middle.

cheers

Taffy

Jayyyxxx11 · Mar 25, 2019

I'll adjust that then mines more like 30mm, wasn't sure what it should be.
Although the noise isn't coming from that area and it's not at idle either

fe600racer · Mar 25, 2019

Can you ride the bike in gear ... in a high gear....on a road would be good. Listen for the noise which I think you will hear. Pull the clutch all the way in and coast and see if you can hear the noise....I think you won't......next ride under constant throttle and listen for the noise then pull clutch in until it just disengages and see if noise goes away then let clutch out and see if noise comes back.....that is see if you can control the noise on and off with the clutch. If you can then I may know what it is....if you can't then I am on the wrong track. Let us know. PS. Not easily finding nuetral is normal and not related to the problem.

Jayyyxxx11 · Mar 26, 2019

fe600racer said:
Can you ride the bike in gear ... in a high gear....on a road would be good. Listen for the noise which I think you will hear. Pull the clutch all the way in and coast and see if you can hear the noise....I think you won't......next ride under constant throttle and listen for the noise then pull clutch in until it just disengages and see if noise goes away then let clutch out and see if noise comes back.....that is see if you can control the noise on and off with the clutch. If you can then I may know what it is....if you can't then I am on the wrong track. Let us know. PS. Not easily finding nuetral is normal and not related to the problem.

Thanks I'll try this and let you know

Jayyyxxx11 · Apr 9, 2019

fe600racer said:
Can you ride the bike in gear ... in a high gear....on a road would be good. Listen for the noise which I think you will hear. Pull the clutch all the way in and coast and see if you can hear the noise....I think you won't......next ride under constant throttle and listen for the noise then pull clutch in until it just disengages and see if noise goes away then let clutch out and see if noise comes back.....that is see if you can control the noise on and off with the clutch. If you can then I may know what it is....if you can't then I am on the wrong track. Let us know. PS. Not easily finding nuetral is normal and not related to the problem.

Hello
You're right in what you was saying, the noise goes away without throttle.
What do you think may be the cause?

fe600racer · Apr 9, 2019

Try this link

02 ktm 520 clutch noise??? - dbw - dirtbikeworld.net Members Forums

Could be normal Berg noise or loose nut etc.

Try putting on stand in sixth gear with plug out and mate turning wheel with clutch inspection cover off and see if you can isolate the noise.

fe600racer · May 9, 2019

Hi there. What was the conclusion? Was it a worn clutch basket?

Jayyyxxx11 · May 13, 2019

fe600racer said:
Try this link

02 ktm 520 clutch noise??? - dbw - dirtbikeworld.net Members Forums

Could be normal Berg noise or loose nut etc.

Try putting on stand in sixth gear with plug out and mate turning wheel with clutch inspection cover off and see if you can isolate the noise.

I haven't managed to do this yet but I'm swaying towards a leak at the exhaust. I've purchased another exhaust so will update when I have fitted that

Thanks

Rattling noise when throttle open

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