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May 23rd, 2010, 06:06 AM   #1
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engine noise when hot

Hey guys, just picked up a 2010 390 on thursday and took it for a break in/ shake down ride last night. The bike is absolutely amazing but when it gets hot the motor knocks pretty loud.If i stop and let it cool down it goes away but as soon as it gets hot again it knocks and it is only at idle. if i bring the revs up goes away. maybe cam chain tensioner? not sure. any insight would appreciated,
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May 23rd, 2010, 03:40 PM   #2
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Re: engine noise when hot

My buddy has a '09 KTM 400 and his cam chain adjuster was failing. It sounded like a ticking, not a knocking. That's why I had the Dirt Tricks tensioner installed before I rode my 390. Have it checked out before it's too late!
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May 23rd, 2010, 05:18 PM   #3
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Re: engine noise when hot

I kinda figured it might be that but its a pretty deep knock and very pronounced when hot. I started it this morning after sitting overnight and its wisper quiet. Guess i will have bring it back to the dealer this week. who knows maybe the sound is normal?
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May 24th, 2010, 06:36 PM   #4
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Re: engine noise when hot

would be good to know the out come,please post again once you know the problem/or not..
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May 25th, 2010, 03:26 AM   #5
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Re: engine noise when hot

I'll take a stab in the dark and say try running Delo 400.
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May 26th, 2010, 03:50 AM   #6
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Re: engine noise when hot

the bike is going to the dealer on thursday morning. were gonna compare it to the demo have they have which has close to 600 miles on it. so we'll see how it goes! i I will post up the outcome? By the way, what is delo 400?
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May 26th, 2010, 05:12 AM   #7
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Re: engine noise when hot

Search "Delo400" or "Delo 400" on this forum. There is heaps of info on it as posts come up all the time about it.
It is a Diesel Truck Engine oil made by Chevron (Caltex in Australia) that seems to work excellent in the old school (pre 09) Husaberg engines according to the users here. Even the clutch apparently feels better with Delo 400.
Thats what I have learnt from lurking on this forum a lot.

I hope you fix your bike OK. I love mine
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May 26th, 2010, 03:53 PM   #8
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Re: engine noise when hot

Gotcha on delo400, over hear in the states alot of guys are using shell rotella diesel engine oil in their 4 strokes. especially the guys running rekluse clutch's. I know lots of guys are running different oil brands and weight in their bikes with no issues.
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May 28th, 2010, 03:42 AM   #9
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Re: engine noise when hot

Well, brought the bike to the dealer yesterday morning, we compared the bike at operating temp too a brand newbike and their demo. My bike and the brand new one sounded the same when hot, so i guess this is normal and thats fine, just needed to know for my own piece of mind. Both my yamahas hot or cold sounded the same so i was a little worried. Their demo on the other hand sounded horrible. The motor was super loud and the timing chain tensioner was ticking away. I guess i'll just have to pay attention to the tensioner as time goes on. First enduro on the new bike this sunday so wish me luck!
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May 28th, 2010, 11:14 AM   #10
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Re: engine noise when hot

Good luck matey, nice line up of off road bikes you have, does that mean you are half decent or just loaded?
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