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Discussion Starter · #1 ·
So since today my duke 790 has started making some squeaking noise, it has 2200 km under its clock, oil change, new filter at 1km.
Chain cleaned and lubed every 500km ish so don't think it's a chain problem although no idea tbh.

Noise seems to be most apparent when I'm running in 2nd gear and just not apply throttle and let it naturally slow down. When I'm accelarating it doesn't make it, only when slowing down.

I made a video to show so hopefully, someone can tell me what the issue is. I know it's best to go to the dealership which is possible and I plan to do so to get it fixed but it's about 450km away and a holiday today and tomorrow where I'm living. And obviously don't want to take a really long drive if it's a serious problem as I will be shitting myself that I get some serious failure whilst on the highway knowing my luck in life, so I will have to pay to get it shipped I guess if it seems too risky to drive it.

Anyway, I will stop rambling on. Here is the video

-vídeo unavailable- admin edit

sorry the quality is crappy, I don't have a gopro or anything so my wife just took it from her iphone.

Thanks in advance for any ideas or suggestions on what could be the issue. A bit disappointed considering I've only had it a month so wouldn't expect one of the bearings to be screwed or something like that
 

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i see you’ve kept up on the chain, but possible it’s the infamous ‘chain chirp’ ?

Tell KTM you want a quality chain to replace the crap one they put on your expensive moto. 😁
 

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Chain. Mine was making the exact same noise. The rollers weren't lubricated on the pins very well from the factory. Cleaned, lubed (taking care to get a lot between the rollers and side plates), adjusted and it's been quiet ever since but I'm planning on installing a new chain and maybe that fancy Supersprox rear sprocket in the future.
 

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Discussion Starter · #4 · (Edited)
Thanks, turns out it was the chain as suggested. I guess I didn't maintain it as well as I assumed or waited to long when I last cleaned and lubed it . I gave it a thorough clean and lubed all sides of it this morning, then took it for a run of about 40km after the clean and lubing and the noise stopped completely throughout the ride. So seems to be solved . Guess I will try to do the clean/lube very 400km now instead of 500km so I don't get the same thing happening again.
 

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So since today my duke 790 has started making some squeaking noise, it has 2200 km under its clock, oil change, new filter at 1km.
Chain cleaned and lubed every 500km ish so don't think it's a chain problem although no idea tbh.

Noise seems to be most apparent when I'm running in 2nd gear and just not apply throttle and let it naturally slow down. When I'm accelarating it doesn't make it, only when slowing down.

I made a video to show so hopefully, someone can tell me what the issue is. I know it's best to go to the dealership which is possible and I plan to do so to get it fixed but it's about 450km away and a holiday today and tomorrow where I'm living. And obviously don't want to take a really long drive if it's a serious problem as I will be shitting myself that I get some serious failure whilst on the highway knowing my luck in life, so I will have to pay to get it shipped I guess if it seems too risky to drive it.

Anyway, I will stop rambling on. Here is the video

https://www.youtube.com/watch?v=kCDnFX5XoVM

sorry the quality is crappy, I don't have a gopro or anything so my wife just took it from her iphone.

Thanks in advance for any ideas or suggestions on what could be the issue. A bit disappointed considering I've only had it a month so wouldn't expect one of the bearings to be screwed or something like that
I had the same exact problem late last year. Lubing the chain solved that squeak instantly. It was driving me nuts and the dealer was no help at all (unless I paid for a full diagnostic... yeah, right!). The noise was identical, not just similar, to the posted video. Great idea to post the video!
 

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I had the same issue on my 790 duke. I washed my bike last week after a trip to cascade mountains and no more chirping but I am planning to clean & lube the chain anyway.
 

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Mine's been driving me nuts, my wife can even hear it from her bike over our comms. I can fully clean and lube the chain, go for a ride the next day and within an hour it starts. Mine's quiet on decel, noisy as heck on cruise through to full throttle. I've adjusted my chain, aligned my chain (Motion Pro tool as well as swingarm to axle measurements to confirm), still does it. And because it takes about 30 mins for the chain to warm up and make noise the dealer can't replicate it (they did check my adjustments though). If I lube it (even if only 100km since full clean/lube) I can get maybe 50-100km again. Motul C2 Road chain spray.
 

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Thank you for this!
I too had this squeaking noise that I thought might have been a front hub issue (made a post about it). Turns out, I cleaned and lubed the chain (Motul paste) and the noise is gone!
It was driving me crazy.
Thank you again
 

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Thank you for this!
I too had this squeaking noise that I thought might have been a front hub issue (made a post about it). Turns out, I cleaned and lubed the chain (Motul paste) and the noise is gone!
It was driving me crazy.
Thank you again
Yea, I renamed your post, similar to when I renamed this one. :geek:
 

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Thank you for this!
I too had this squeaking noise that I thought might have been a front hub issue (made a post about it). Turns out, I cleaned and lubed the chain (Motul paste) and the noise is gone!
It was driving me crazy.
Thank you again
I hope yours doesn't return like mine!

My wife clarified her stance on my chain. She couldn't hear it through our comms. She could hear it over the uncorked Yoshimura on her CBR. Yeesh...

Since I've had to adjust this chain 3-4 times in my 4800km, as well as the unbearable noise, it's time for a change. The KTM replacement chain is a DID (I checked a new KTM box today), not the CZ we get from the factory. Even Suzuki used a basic DID oring chain on my super-econo DR650. May as well do the PP rear sprocket too, will be the only orange on the bike but oh well.

4671
 

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If you want a NON-ORANGE Supersprox Stealth for the 790 - Supersprox | - KTM - Road Bikes - 790 ccm - 790 Duke [2017-2019]

Having had a hard look at the European page - tbh I'm not sure that on the 41 tooth sprocket there is much weight saving over their 100% steel sprocket.
I am going to drop a tooth on the front and may also add a tooth at the rear - Torn between KTM OEM and the Supersprox Steel - and really because the Supersprox Stealth in 42 is not currently available in Black.

The steel aint bad
4676


And it's half the price.
 

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Question. O-Ring chains. If the oil/grease behind the rings is poor or dries out - How does one force new lube in there?.

I have not owned a bike with a chain since the mid 1980's uttil this one.

I have a couple of ideas - Anybody know anybody who makes high grade carbon fibre parts - to ask about using his degassing pump.
 

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The PP sprocket is significantly cheaper enough for me to forgive the orange. My wife had a Supersprox stealth +2 rear on her old CBR600 for about 20k km and it still looked new when she sold the bike. She's got the same DID chain and more Supersprox to go on the new CBR. I don't need sprocket weight savings, just for it to last as long as a top DID chain. :)

The o/x/z-rings are under pressure from the side plates, so they're doing their best to seal at all times. Soaking the chain won't do it. Even if you could move an oring over with a pick to get some grease in, it's a heck of a lot of orings to not damage. Replace the chain is pretty much where that ends.
 

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Here the Supersprox Steel is 26Euros - the Supersprox Stealth 70Euros

PowerPart Supersprox is 65€. But only one size. The OEM steel KTM rear sprockets are not expensive either.
Rather surprised. And available in multiple sizes.

I think it MAY be possible to put the chain into a degasser - it will by simple vacuum draw air (if it's dry - there is air in there) out and any oil in the pot will be drawn gently back into the rollers. But it's not something I intend to rush into. The rings are not under pneumatic levels of sealing.

Probably cheaper to get a new chain though - as long as it's not GOLD. And absolutely not Orange.
 

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Chain is noisy with these bikes.Lots of lube. Replace as necessary.
 

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It definitely helps. I lube every couple of weeks and it stays pretty decent.
 

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I had the same issue on my 790 duke. I washed my bike last week after a trip to cascade mountains and no more chirping but I am planning to clean & lube the chain anyway.
Cleaned and lubed the chain with Motorex products as per the manual and the noise is gone.
 

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I’ve got just over 10 k on mine and it started squealing like a pig at around 8 k. I clean and lube after every ride and it only takes about 10 km for it to squeal again. It’s adjusted properly. It’s just a crap low quality chain. One of my riding buddies has the 890 and has already replaced his with a good quality chain,and once installed, has had no further issues with chain noise.
too bad Ktm had to cheap out with a budget chain to cut cost.
 

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and i thought it's only me with this issue.. local dealer made a test drive but didn't see the problem here - "not louder than other KTMs' chains".

so i guess it's time for a chain change, don't wanna be cleaning/lubricating the chain again for it to start squeaking after 100km's or so...
 
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