A new buzzing at startup - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 12 Old 04-04-2006, 11:43 PM Thread Starter
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A new buzzing at startup

My '05 DL650 with about 5300 miles has recently developed a new intermittent buzzing noise at startup. I would characterize it more as a "rapid clicking" than a buzzing, actually. It starts when I switch on the bike and keeps going for a few seconds after the fuel pump has stopped whining. It happens maybe only once out of every fourth or fifth start, and I haven't found a pattern or way to duplicate it yet. It doesn't seem to affect the bike any, it still runs just fine and there are no trouble codes in dealer mode.

Any ideas what this could be? If there's a problem brewing I'd like to nip it in the bud if I can.
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- Jet Jaguar

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post #2 of 12 Old 04-04-2006, 11:49 PM
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Can you tell where the noise is comming from? And how long does it last, meaning does it always last for x number of seconds and then go away, or does last for different amounts of time and go away? Does it never go away?

'06 DL1000 - Grey
'89 GSXR 1100
'85 GS550E (Suz)
'75 Yamaha MX250B
'73 Yamaha MX125

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post #3 of 12 Old 04-05-2006, 12:47 AM
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JetJaguar, outside of any relays setting up for their job I can only think of one thing. Hopefully it may lead to another post saying yaa or nay. Is it possible you are hearing the injectors limbering up for service. It may be a long shot or a shot in the dark mind of an old guy. Ride On.

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post #4 of 12 Old 04-05-2006, 11:51 AM Thread Starter
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It happened again this morning, only this time I also got an "FI" warning light. I was able to pinpoint the source, it's definitely coming from the top of the front cylinder. In dealer mode I got two trouble codes - C21 and C28. I don't know what to make of the first one (intake air temperature sensor), but C28 is the secondary throttle valve actuator.

Based on this new information, I believe the STVA is going bad. After work I'll check it to see that it's moving at startup like the service manual says it should and if that checks out it looks like it's off to the dealer.

- Jet Jaguar

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post #5 of 12 Old 04-05-2006, 01:09 PM
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If the intake air temp sensor is bad, could that cause the secondaries to open an close in rapid succession, possibly causing the C28? Just a half-baked thought.

06 DL-650 - SilverBlue
05 DL-650 - red (RIP - watch your mirrors!)
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post #6 of 12 Old 04-06-2006, 08:23 PM Thread Starter
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Well, it's in the hands of the dealer now. The bike was perfect the rest of the day and everything looked okay when I checked it after work. That's the trouble with these intermittent problems - they never seem to act up when you're looking for them. My only other theory is maybe there's something wrong with the ECM. That's the only way I can think of getting two simultaneous, yet seemingly unrelated, trouble codes.

When I dropped it off, he told me he thinks the motor that actuates the secondaries may be sticking. He's seen that a few times on GSXR's, but this is the first time on a 'Strom.

- Jet Jaguar

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post #7 of 12 Old 04-06-2006, 11:58 PM
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Another thing you could try if the dealer can't fix it is to just remove the secondaries. Some like to make this mod anyway so it could fix your problem at the same time.

However it's still best to fix the underlying problem if possible because it may effect more then just the secondary movements, like the fuel mixture, etc.

Good luck!

'06 DL1000 - Grey
'89 GSXR 1100
'85 GS550E (Suz)
'75 Yamaha MX250B
'73 Yamaha MX125

Keep your feet on the pegs and your hand on the throttle.
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post #8 of 12 Old 04-12-2006, 06:18 PM Thread Starter
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An update: the dealer tells me the secondary valve actuator motor has failed, as I, and the mechanic, initially suspected. The bad news: it's not available as a separate part, so the entire throttle body has to be changed out. Worse news: my factory warranty ran out the day before I brought it in. The dealer is trying to see if they can get Suzuki to cover it under the warranty anyway.

- Jet Jaguar

It's not an adventure unless you need a tent, a passport, and a leather glove for your shooting hand.
'05 DL650
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post #9 of 12 Old 04-12-2006, 11:06 PM
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Quote:
Originally Posted by JetJaguar
An update: the dealer tells me the secondary valve actuator motor has failed, as I, and the mechanic, initially suspected. The bad news: it's not available as a separate part, so the entire throttle body has to be changed out. Worse news: my factory warranty ran out the day before I brought it in. The dealer is trying to see if they can get Suzuki to cover it under the warranty anyway.
Oh man, baaaaad luck, that really sucks! Hope they pull something off for you to get that paid for. If not, try to find out if that mechanism controls anything other then the actual secondary things (the round things). If they don't, you could just remove them. But that part may control other things like mixture, etc.? If so, you may be out of luck.

'06 DL1000 - Grey
'89 GSXR 1100
'85 GS550E (Suz)
'75 Yamaha MX250B
'73 Yamaha MX125

Keep your feet on the pegs and your hand on the throttle.
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post #10 of 12 Old 04-13-2006, 05:03 PM
 
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Jet, which dealer are you using for repairs? Just curious as I bought mine at Longwood. I'll be interested to hear if it is them you are dealing with. Good luck!! We will miss you this weekend.

Jim
2010 FJR1300 Silver
'05 DL1000 V-Strom (gone, but not forgotten)
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