New 2020 KTM 350sxf Loud Engine Noise

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1/17/2020 8:26 AM

As the title says I have a new 2020 KTM 350sxf that seems a lot louder than my 2018 or any of my KTM 450's. The bike seems to run well and does what is should but its engine noise is noticeable. I have more than a few friends make comments about this. I'm planning on a trip to the dealer but I'm afraid unless its broken they won't be able to do much. The bike has about 3.8 hours on it. What should I look at or test? Thank you

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1/17/2020 8:54 AM

Most likely it is the cam chain tensioner as they are very noise.

Paw Paw

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1/17/2020 8:59 AM

Paw Paw 271 wrote:

Most likely it is the cam chain tensioner as they are very noise.

Paw Paw

So, is it a problem that needs to be corrected or is that just the way they are and not to be worried about?

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Powerband in every gear !

1/17/2020 9:24 AM

The new bikes are louder, I noticed it for sure. No problems and I have 55 hours on my 2019 350. One thing I listen for is that when the bike is cold, it will be louder then once the oil gets to the top it will get slightly quieter, that means the oil pumps are working and its flowing.

Obviously if it's crazy loud or abnormal, check;
Valves
Cam chain (but isn't KTM auto hydro adjusted?)
oil level
oil delivery to the top end

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1/17/2020 9:40 AM

My 2019 FC350 was loud AF for a few seconds after cold startup. It was the time it took for the cam chain tensioner, which is hydraulically actuated via engine oil, to start tensioning. After a few hours, it's not as bad.

When does yours make noise?

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1/17/2020 9:44 AM

Ive noticed the same thing on my 19 with 9 hours on it. It sounds like it has 80 hours. But feels and rides tight.

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1/17/2020 10:48 AM

Thanks Guys For The Replies. On my bike it didn't seem terrible but when more than a few people comments about it you start to wonder. I'll note if if gets better after it warms up. Most comment about it when I start it after sitting a few minutes from being on the track. Good to hear they are noisier. I'll check out those items.

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1/18/2020 1:12 AM

Funny you say that as I think my 18 is noisier than my 12 was. I’m pretty anal about oil changes and tend to change it more than recommend (2.5-5hrs with a filter) by KTM. A couple of times I’ve pulled over when I thought it did sound right.
Still has plenty of power, runs well, sounds ok.

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2/7/2020 6:31 PM

Happened upon this. Replacement tensioner that claims to cure the loud cam chain.

http://www.cyclebuy.com/shopping/dirttricks/tensioner.htm

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Powerband in every gear !