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Does anyone has an answer from Yamaha as regards the rattling noise after restart. It must be from cam chain tensioner.
The new XSR900 has this B7N-12210-01.All others B7N-12210-00.
It is very annoying and I think that as miles pile up it gets worse.
 

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2021 Yamaha MT-09 SP
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Does anyone has an answer from Yamaha as regards the rattling noise after restart. It must be from cam chain tensioner.
The new XSR900 has this B7N-12210-01.All others B7N-12210-00.
It is very annoying and I think that as miles pile up it gets worse.
Uh, do you have a recording of the sound? It probably is the cam chain tensioner. The cam chain may make a clicking sound until the bike warms up.
 

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No I don't have a recording but it is the same as others showed
My 2021 09SP had the same noise left front to the tappet cover during warm up for a few min's then went away, I sold the bike a few weeks ago & the noise never changed & never got any worse. My 2022 09SP has the same noise, 1100kms on the clock.
 

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It may be "normal" for these cam chains to get loose and slap around every time the engine has to warm up, but it can't be good for the chain shoes to get smacked around like this daily. Hopefully it's hitting guide shoes and not tickling the cases.

Hydraulic tensioner or not, why does the tensioner allow it to go loose all the time? Does it not have a ratchet? Why would it take several minutes for oil pressure to build up to activate it? None of the excuses given for this noise makes sense.

Hell, if you bought a car in 1950 that ticked that hard you'd take it back. Strange.
 

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21 MT09 SP 05 Ninja 636
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I have a 21 MT09 SP. I also have the cam chain noise on cold startup and and a warm startup if the bike sits for say 10mins or so. All the newer 890cc CP3 engines do it as far as i can tell, cant believe that got through QC. If you blip the throttle the noise will go away then sometimes comes back sometimes doesn't. These new CCT's get tension from oil pressure from my understanding, which would explain why it goes away after the engine idles for a bit or if you blip the throttle thus raising oil pressure momentarily.

I'm already considering installing a manual cam chain tensioner but probably not until I hear about a lot of other people with this engine doing it with success. It's annoying and anybody who hears it inevitably asks about it, kind of embarrassing to explain why my brand new bike sounds like it has rocks rattling around under the valve cover.
 

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Here at 1.15 min and on.See the discussion that follow there
This particular sound during warmup, my first gen had, even with a manual tensioner. It's there for maybe 10 seconds, then fades away. No problems in 75K miles...

TBH, I haven't noticed this on my Cyclops as I put my earplugs on before I start the bike and if it's there, it's not loud enough. I'll try to listen for this next time.
 

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Just because you can? just curious lol.
kevxtx has been here from the beginning and has some commercial interest in these bikes. He also owns some other brands and moves them around also. Like vcyclenut here in the US when kevxtx speaks the smart people listen.
 
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