08 M50 doesn't idle up cold and stalls before warm-up - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
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post #1 of 19 (permalink) Old 07-07-2019, 04:28 PM Thread Starter
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08 M50 doesn't idle up cold and stalls before warm-up

Hi there!

Recently purchased 08 Suzuki blvd M50 bike and I love it!

For now I am trying to figure out why it has issues starting cold, is there an Idle Air Control valve somewhere that doesn't work?
I do not have a copy of manual, download link in this forum doesn't work ...

My M50 does not rise RPM when started cold, I need to hold it for 15-30 secs at a little higher revs and then put it into first gear to stabilize it ... it usually idles perfectly fine after that.

Is there anything I could check myself before letting a shop look into it and charge me an arm and leg?

Thanks
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post #2 of 19 (permalink) Old 07-16-2019, 04:46 PM
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The idle air control is on the left side of the engine behind a little decorative cover. It's just a plunger that a servo can move in and out to open/close a valve, respectively. Sometimes they get stuck. There's two bolts that hold the servo in, when I removed it on mine the bolts were VERY tight and Suzuki makes all their fasteners out of cheese, so very easy to strip. Ensure the plunger moves freely and spray some carb cleaner in there to remove any gunk. With the servo out, turn the key on with kill switch on, then turn it off. The plunger should suck out (open) for cold starting. When you turn the key off it should release (closed).

It's just an air valve that allows more air to bypass the throttle blades, effectively giving the bike more throttle. Older EFI bikes with a "choke" lever did this, it just was a little cam that propped the throttle open slightly more than usual.

I'm referencing a 2005 model, but to my knowledge these things did not change too much over the years.
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post #3 of 19 (permalink) Old 07-16-2019, 07:49 PM Thread Starter
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The idle air control is on the left side of the engine behind a little decorative cover. It's just a plunger that a servo can move in and out to open/close a valve, respectively. Sometimes they get stuck. There's two bolts that hold the servo in, when I removed it on mine the bolts were VERY tight and Suzuki makes all their fasteners out of cheese, so very easy to strip. Ensure the plunger moves freely and spray some carb cleaner in there to remove any gunk. With the servo out, turn the key on with kill switch on, then turn it off. The plunger should suck out (open) for cold starting. When you turn the key off it should release (closed).

It's just an air valve that allows more air to bypass the throttle blades, effectively giving the bike more throttle. Older EFI bikes with a "choke" lever did this, it just was a little cam that propped the throttle open slightly more than usual.

I'm referencing a 2005 model, but to my knowledge these things did not change too much over the years.
Thanks RWhitehosue for explaining what I should look for on the bike!
Will try that over weekend with carb cleaner. Should I get replacement bolts ahead of time? Where from best? Did yours strip?

Also, I already need to get bolts of 2 kinds. I'm missing 1 of 3 that hold the chrome shroud on top of gas tank ... and 1 more somewhere else, so intending to ask a dealer locally. Are there other ways?

'08 Suzuki Boulevard M50 @ 9,200 miles
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post #4 of 19 (permalink) Old 07-16-2019, 08:14 PM
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post #5 of 19 (permalink) Old 07-16-2019, 11:21 PM Thread Starter
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right, that's an option too
I will stick to online dealer store for now to get missing bolts, I simply want them to be same as others and I am not replacing them all, just filling the blanks I noticed.
Found some dealer sites with diagrams, so I can find out what I need exactly, not cheap tho ...

'08 Suzuki Boulevard M50 @ 9,200 miles
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post #6 of 19 (permalink) Old 07-16-2019, 11:30 PM
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Partzilla has the cheapest parts I found. I lost one of those bolts too. Replaced them with hex head ones with a washer from the hardware store. I actually like the look better so I kept them like that.
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post #7 of 19 (permalink) Old 07-17-2019, 12:03 PM
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Mine didn't break or strip, but I could certainly see it being a possibility.
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post #8 of 19 (permalink) Old 07-17-2019, 07:29 PM
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Ace Hardware usually has an exact match for my bolts, in chrome or stainless.
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I can head East or West, it doesn't matter as long as it's on 2 wheels.
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post #9 of 19 (permalink) Old 07-17-2019, 08:01 PM
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Originally Posted by feniks View Post
right, that's an option too
I will stick to online dealer store for now to get missing bolts, I simply want them to be same as others and I am not replacing them all, just filling the blanks I noticed.
Found some dealer sites with diagrams, so I can find out what I need exactly, not cheap tho ...
I think they probably have what you need for pennies on the dollar over what you're going to pay online.

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post #10 of 19 (permalink) Old 07-18-2019, 07:48 AM
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just take the mc down to an ace hardware store...find out what you need by actually trying them out in the areas you need to make sure they fit...that's what I do...I leave the guy my credit card or a $10 bill and I start my searching...now he just tells me...do what you need to do..pay me when your done. Also a good selection in stainless steel.

Whats the big hurry...slow down and enjoy the ride!

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