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I just want to know longevity issue. I havnt ridden bike in a week since ecu is gone
I will report any changes with the restrictions and such removed doubtful makes any changes that I will notice other than fan temps kicking on at 205
 

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It’s still gonna rattle/tap it’s ass off on a hot start trust me. I’m losing faith is Suzuki this is bullshit. My 21 GSXR ain’t this noisy ever and it has what I’d call a nice loud tapping sounding engine with the rattling mechanical VVT it has.
 

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It’s a GSXR I will let that go since it runs like a nothing on this planet. But the engine sounds like it’s coming apart at hot idle. So maybe the gsx has that built in. That’s a let down cause my 2016 naked albeit wasn’t a quiet engine it didn’t sound like a hammer on start up hot.
 

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I’m still blown away no one noticed this like a year ago when these bikes hit Europe and all the content creators and YouTubers were getting these bike free to go rape at Will. Surely they heard this bs hot start tap/rattle 🤷‍♂️ Maybe not these people are only after subscriptions and likes. 🙈 losers!
 

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Discussion Starter · #47 ·
I am seriously second guessing picking up my bike over this. The motor / trans is why I loved my 2018 and my 2020 already kinda bummed and don’t even have her yet.
 

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I guess after this long thread, it’s better to manage expectations. There hasn’t been a single motor reported with serious issues caused by cam noise. Even historically Suzuki GSXR bikes with cam chain noise were more of a nuisance than a critical issue.
 

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My diagnosis for what it's worth:

If the cam chain tensioner is hydraulic (does anyone know?), then it makes perfect sense that hot starts will cause a clatter. The same thing happens on my Hyundai car with hydraulic tappets.

The tensioner creates tension when there is oil pressure. I am presuming that the oil enters the tensioner under pressure (it will be a low psi) as soon as the motor is started. When the engine stops, oil drains from the tensioner and tension is lost.

When the engine is hot and the oil is very fluid, it will drain almost immediately from the tensioner and thus the noise will occur on a restart. Colder less viscous oil, would remain in the tensioner and keep the tension for the next start. So there would be no noise on a cold start (or the oil has drained from the upper cylinder head into the tensioner).

The valves on my Hyundai sound terrible from a hot start but as soon as pressure builds up, the noise goes away.

It's also possible that there should be some sort of one way valve that acts to retain the oil in the tensioner when the motor isn't running and that this is the component that has failed. I would need to see a tensioner to determine how they work.(anyone got a workshop manual?).

It is also possible that the oil put into the bike from the factory, has properties that prevents this draining of the tensioner when the motor isn't running.

I too, noticed that this noise started immediately after the first service and the oil was changed.

In any cause, I am not concerned that this is a failure or that the bike is about to expire. Anyone who has owned any air cooled Suzukis in the past, will know that cam shaft knock and clutch rattle were all part of the experience of owning a Suzuki and add to their character.

These motors are unbreakable.

I would however suggest, when starting the bike, that you allow the oil pressure to rise and the noise to abate, before you set off or rev the bike. Hardly an issue.

Now if it was a Honda and you heard this noise ....
 

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Mine smooth at 5k and higher, 10 secs or so of ticking on some warm starts and otherwise nothing.

As for oil pressure, watch the oil sightglass as you start up- see the level sucked down- all that is going thru the engine and up over the top end. If the oil pressure light isn't coming on then pressure is at least nominal. Not sure what the big deal is here.
 

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It is not serviceable and it’s not oil pressure operated. It does have an oil jet for lubrication. I looked all this up in my service manual. It only mentions to replace it if it is not extending properly when it’s out of the engine and being reset to be installed back in the bike. It’s sold as a unit and cannot be disassembled. Not sure why or if this is what we are hearing on hot starts. Mine tapped and hammered on every hot start today. Still no where as noisy as a Ktm engine running. Just irritates me that my 2016 gsx and 2006 GSXR with same engine did not make this noise.
 

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1989 GSX750F, __ 2022 GSX-S1000GT
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...... This new cam chain tensioner is a dud. Plain and simple. Suzuki has done this stupidity in the past same **** part of the engine. ...
Just interested to know, did you stick to the 5,500 rpm limit for the first 500 miles and 7,500 rpm limit until 1000 miles?
 

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Just interested to know, did you stick to the 5,500 rpm limit for the first 500 miles and 7,500 rpm limit until 1000 miles?
No and I never have in the past on any Suzuki. I have taken GSXRs straight from the showroom with 5 miles on them and gridded them up for a race. Never a problem. I was under that rpm lawyer talk recommendation for maybe 300 miles then had a trip which required power to keep from getting killed on it. It had plenty of quality heat cycles prior to that. That is not the reason for this and if it is that is weak build quality because I am not the only one hearing this. And it appears it dates back to the 2020 model Katana's with same engine.
 

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Update....I took my bike to my dealer today for 12k service and check over from my big trip.
I was able to show them my "hot start rattle"....they suggested I leave it with them overnight so they can do hot and cold oil pressure checks....and so that they can start a file to document what's happening with my bike....they gave me a new V-strom to take home.
This is how a dealer should do things! I am lucky to have them in my corner!
Stay tuned!
have you got the answer jet ?
 

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My diagnosis for what it's worth:

If the cam chain tensioner is hydraulic (does anyone know?), then it makes perfect sense that hot starts will cause a clatter. The same thing happens on my Hyundai car with hydraulic tappets.

The tensioner creates tension when there is oil pressure. I am presuming that the oil enters the tensioner under pressure (it will be a low psi) as soon as the motor is started. When the engine stops, oil drains from the tensioner and tension is lost.

When the engine is hot and the oil is very fluid, it will drain almost immediately from the tensioner and thus the noise will occur on a restart. Colder less viscous oil, would remain in the tensioner and keep the tension for the next start. So there would be no noise on a cold start (or the oil has drained from the upper cylinder head into the tensioner).

The valves on my Hyundai sound terrible from a hot start but as soon as pressure builds up, the noise goes away.

It's also possible that there should be some sort of one way valve that acts to retain the oil in the tensioner when the motor isn't running and that this is the component that has failed. I would need to see a tensioner to determine how they work.(anyone got a workshop manual?).

It is also possible that the oil put into the bike from the factory, has properties that prevents this draining of the tensioner when the motor isn't running.

I too, noticed that this noise started immediately after the first service and the oil was changed.

In any cause, I am not concerned that this is a failure or that the bike is about to expire. Anyone who has owned any air cooled Suzukis in the past, will know that cam shaft knock and clutch rattle were all part of the experience of owning a Suzuki and add to their character.

These motors are unbreakable.

I would however suggest, when starting the bike, that you allow the oil pressure to rise and the noise to abate, before you set off or rev the bike. Hardly an issue.

Now if it was a Honda and you heard this noise ....
the isuies wasnt there the first 1000 km .so what do you think happens then?
Mine have the same sound the last 5000km
 
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