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Discussion Starter #1
so, few days I ago i took my burgie 400 to the suzuki dealer for the 600 mile oil change and check up. everything went and looked good until the next morning.
Overhere it's winter so, its usually around 30F these days in the morning. anyways right after the first oil change when I start the bike in the morning there is a weird noise coming from i dont know but seems to be located under the seat somewhere... it sounds like a when a new rubber thing makes contact with metal, I would say that maybe the transmission belt but why would it start making noise after the first check up? the sound does go away when the engine gets warm, though. it kinda freaks me out since it wasn't there before. It took it back to the dealer and the mechanic told me it was "normal".

does anybody have any suggestions?
 

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Re: unknown rubber like noise at cold start after 1st oil ch

does it do it when the bike is cold , up on the center stand and the back tire not rotating? maybe you could get a better idea where the sound is coming from that way and we could have a better idea. i was told at one time that rubber is one of those wierd things that gets looser as it gets colder instead of tighter ( this is a very interesting theory and may explain some things about long thin rubber things that seem bigger when cold ) and it could be your belt .
 

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Re: unknown rubber like noise at cold start after 1st oil ch

If the noise stayed around all the time, it would be easier to find. I would then look for something hanging loose that shouldn't be, like something in the wheel well area.

mikeymarine brings up a good point. When do you hear the noise?
  • When the bike is on the centerstand and the rear wheel is moving?[/*:m:3bs9tyb8]
  • When the bike is on the centerstand and the rear wheel is stopped?[/*:m:3bs9tyb8]
  • When going down the road?[/*:m:3bs9tyb8]
  • When the engine is off and you're moving the bike under your own power?[/*:m:3bs9tyb8]
My first inclination, like his, is to suspect the belt. Some bikes will get "belt slap" in the CVT, but I've never heard of it on ours. The Silverwing forum talks about it on theirs. My concern would be that the nut holding the variator on, isn't torqued properly. It's a simple thing to check.

Please give us some specifics on when the noise occurs.

Chris
 

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Discussion Starter #4
Re: unknown rubber like noise at cold start after 1st oil ch

When do you hear the noise?
When the bike is on the centerstand and the rear wheel is moving?
A: Yep

When the bike is on the centerstand and the rear wheel is stopped?
A: Yep, I used the rear break to test that theory, the mechanic told me to test that so i did, the sounds keeps on, when the rear wheel is stopped.

When going down the road?
A: Nop, sound stops when moving

When the engine is off and you're moving the bike under your own power?
A: No, it only sounds when it's on center stand, either with rear wheel stopped or not.
 

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Re: unknown rubber like noise at cold start after 1st oil ch

last thing before cracking open the cvt, if you go out in the cold, start it and just let it idle till the temp comes up to mid range, when, or does, the noise go away. i cannot force myself to believe a dealership actually opened the cvt for a 600 even if he was supposed to change the final drive oil,
 

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Discussion Starter #6
Re: unknown rubber like noise at cold start after 1st oil ch

mikeyMarine said:
last thing before cracking open the cvt, if you go out in the cold, start it and just let it idle till the temp comes up to mid range, when, or does, the noise go away. i cannot force myself to believe a dealership actually opened the cvt for a 600 even if he was supposed to change the final drive oil,
when the temp reaches mid range, the sounds goes away.
 

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Re: unknown rubber like noise at cold start after 1st oil ch

ok i got
under seat
recent 600
sound like rubber/metal
quits after warmup
quits under engine loading???? I think as in going down road cold or norm operating range
and I am thinking the oil pump is also the water pump and after the thermostat opens , the loads on pump change,
when driving the loads from the engine to the oil/water pump change
dealer messed with oil,
thermostat and oil/ water pump are both under seat

dealer says this is normal, ok dealer must have another bike there he can crank up and show you it is normal, or yhou may have to furnish another bike to show him it isn't or find a dealer/mechanic to verify or vilify the first mechanic

but then I been without a bike so long I'm hallucinating so what the heck do I know.
 

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Discussion Starter #8
Re: unknown rubber like noise at cold start after 1st oil ch

I've uploaded a video, it's very hard for people that isn't used to the normal engine noise to actually detect the "rubber" noise I talk about... anyways.. here it is:

http://www.youtube.com/watch?v=TSxnFbHYKRQ
 

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Re: unknown rubber like noise at cold start after 1st oil ch

I don't hear anything out of the ordinary, it sounds normal to my aging ears. There could be a little belt slapping going on, but that is no big deal.
 

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Re: unknown rubber like noise at cold start after 1st oil ch

From the video it sounds normal it's hard to tell, bit of cam and cam chain noise
and I think a bit of roller rattle but nothing that sounds out of the ordinary,
if a member lives nr you maybe they could have a listen and let you hear theirs
running.
 

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Re: unknown rubber like noise at cold start after 1st oil ch

i hear a hammering or thumping, but that may be background as it is irregular and sounds like me opening oysters with my tenderizer
 

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Discussion Starter #12

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Re: unknown rubber like noise at cold start after 1st oil ch

I did not hear anything usual in either video, except your idle sounds a little low.
 

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Re: unknown rubber like noise at cold start after 1st oil ch

well. it never hurts to open he cvt and look, maybe do some cleaning while you are in there, check rear tire for bearing/mounting problems
 

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Re: unknown rubber like noise at cold start after 1st oil ch

Very hard to say from the vid but but I think its the rollers in the veriator
it does sound noisy but it's hard to tell from a video
 

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Fernando, I'm replying a bit late now but just seen your post and you may still be worried or may have found your issue of course. However, in my honest opinion you are hearing a normal noise. When in a very cold environment many engines make a similar noise. On a wet sump bike like the Burgman 400 it's a bit more pronounced. It is I believe the sound of the oil and piston in the bore as it idles that you are noticing. It's a kind of shooshing or wooshing noise in time with the piston going up and down as the engine ticks over. It goes away as the cylinder, piston, rings and oil begin to warm. You also won't hear it as you ride. In warmer weather you won't notice it.
 

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I am certainly no expert but agree that it sounds normal to me other than idle a bit low.
 

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Discussion Starter #19
yeah, i took it to the dealer and they found nothing. I went ahead and bought two bottles of 10w40 Motul 4T and the oil filter and changed it myself. guess what, the darn noise is gone. The oil looked pretty bad quality and viscosity looked like it was 20w40.
 

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Great news! It did sound like a normal cold oil cylinder suction noise to me and if the oil in the engine was too thick, that would make it sound much louder. Glad you sorted it.
 
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