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Re:Melted Air Cleaner Issue
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TOPIC: Re:Melted Air Cleaner Issue
#599454
brandonros (User)
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Melted Air Cleaner Issue 4 Years, 11 Months ago  
The 05 Midnight I just bought a couple months ago started dying on me whenever it would idle for a few seconds. I thought maybe it was a dirty carb or blocked jet so I decided to clean up the carb. However, after putting everything back together and trying to set my PMS, at one point, I leaned it way too much and watched my exhaust pipes glow red from the heat. So I enriched it all the way and shut it down real quick. Unfortunately, I was a little too late and saw that the high heat had started to melt this small, plastic case for the small air cleaner on the front of the bike. I saw that this air cleaner is part of the exhaust system under Yamaha's Parts Catalog, but I'm really not sure what that air filter does.


My issue is, it was still sealed and I was going to keep using it until I received a replacement in the mail so I started up my bike and just let it idle in my garage (door open) for about 10 minutes today. Then I saw that this thing was melting even worse but the pipes weren't red. I have the PMS turned only one-half turn out from full rich. I understand why it melted the first time when I had the the PMS way too lean, but now I don't know why it keeps melting. Could this be because... A. It was already melted and weakened enough to keep melting from the initial heat, or B. Still running too hot because of something I did wrong to the carb? or C. Is it bad to leave the Air-cooled Road Star running for 10 minutes in a garage with no air flow across the exhaust causing plastic to melt?

Thank you!

Here's the nasty melt:
 
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#599463
texasscott1 (User)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
That's the filter for the AIS intake. Yes it is bad to idle an air cooled engine without any airflow. The stock front headpipe is double walled to prevent that from happening. Even when it wasn't glowing there was still a lot of radiant heat from the single walled pipe.

When it was lean or rich and glowing then it could have been the AIS reigniting the unburnt fuel in the pipe. Quite a few owners have removed the AIS.
 
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My 99 Standard Test Mule
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#599465
Blackroadie (Moderator)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
Thats your AIS pump. You can live without it but you need the blockoff kit... about $20. Is the bike stock?
Generally, the pms should be set about 2 1/2 turns out from a light seat....to get started.
 
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Last Edit: 2013/03/11 20:33 By Blackroadie.
 
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#599478
brandonros (User)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
You guys are awesome. Thanks for the info and advice! I'll look into the blockoff kit and keep it running outside of the garage. But yeah, everything is stock as far as I can tell except the previous owner installed some kind of straight pipes that I think are seriously causing me some hearing loss. My friend who has an Electra Glide with straight pipes was shocked that mine were still louder than his. But when I can afford it, one of the first things I'll buy is a nice, quiet exhaust.
Thanks again!
 
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#599483
texasscott1 (User)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
You'll be surprised at the gain in performance you'll see with the right exhaust and baffles.
 
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#599490
davej (User)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
brandonros wrote:
You guys are awesome. Thanks for the info and advice! I'll look into the blockoff kit and keep it running outside of the garage. But yeah, everything is stock as far as I can tell except the previous owner installed some kind of straight pipes that I think are seriously causing me some hearing loss. My friend who has an Electra Glide with straight pipes was shocked that mine were still louder than his. But when I can afford it, one of the first things I'll buy is a nice, quiet exhaust.
Thanks again!


Letting it sit outside idling for 10 min or so isn't good either. Air cooled engines needs air movement around the eng to dissipate heat. I believe the R* will shut down if left idling for 20 min and set a code.
 
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#599495
JakeUSAF (User)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
That's your AIS system and it should be the first mod to your bike, remove it and dump it in the trash! It takes absolutely no time to remove it and almost every single person on the clinic has removed theirs. If you need help removing it just ask and we will all chime in to help.
 
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Last Edit: 2013/03/11 21:30 By JakeUSAF.
 
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#599503
stinger (User)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
When I'm working on the bike & need to have it running for extended periods, I have a fan set on high, blowing air across the engine. I still try not to idle too long at a stretch. As others have said, lose the AIS, you'll be glad you did. If you need help,there is a good article in the Tech section about it & if you get stuck, we'll help you through it.
 
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#599512
signal20k9 (User)
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
+1 on the AIS removal. It cleans up the front of the engine, allows more air to flow while riding, and gets rid of the decel pop in the exhaust. Get rid of it and then pick up some used pipes. You can usually find decent used ones in the classified section here or on ebay pretty cheap.

Baron's AIS kit $25
http://www.jpcycles.com/product/ZZ40311

Used Exhaust $153 shipped. Lots better than open pipes. Just to give you an idea whats out there.

http://www.ebay.com/itm/Exhaust-Lower-Aftermarket-Yam-Roadstar-1600-1999-2003-/220573142082?pt=Motorcycles_Parts_Accessories&hash=item335b2f0c42&vxp=mtr
 
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I can handle going fast. Its the crashing and burning that sucks!
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#599516
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Re:Melted Air Cleaner Issue 4 Years, 11 Months ago  
Another vote for AIS removal. Barron's Kit is a must have!

Looks so much cleaner, just did mine...

now I'm thinking about that fuel pump delete...
 
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