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Maintenance & Workshop Talk The central area for general maintenance, trouble-shooting and modifications ------------ (Other technical forums on the site are model specific)

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Old 11-11-2012, 10:53 PM   #1 (permalink)
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2011 Triple - Carbon on Intake Valves - Cylinder 2

So awhile ago I noticed that I was having some idle problems. I checked my throttle bodies and they weren't in sync. Cylinder 2 was off, pretty far, I think it was off by about 60 relative to the other two so I tried to fix it so the bike would run better til I could get it to the shop. No go, had to rough ride it down there.

So I took it to the dealer. They couldn't sync them either but they were "within spec". Whatever the hell that means. The manual says, using their tool to adjust the TBs until it says "synced". If they were within spec then I would imagine the tool would say synched. What a load of bull. The bike did run more smoothly after they f'd with it.

I was still suspicious as to there being a problem. I bought a manual and proceeded to remove the throttle body so I could see for myself.

Here are a couple pics:






I'm not sure what is causing this. The TBs smell of fuel, a lot and even seem to have some in the cylinders up near the seal. I am not sure if that is normal. So what direction can I go now? What is the best way to clean these and what are potential causes?

I think I'll pop the plugs out and see what they look like as well.

I should add that my bike doesn't smoke or anything that. It does smell, uhh sweet maybe? after turning it off. Am I too rich?
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Last edited by Moogs; 11-11-2012 at 11:11 PM.
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Old 11-11-2012, 11:59 PM   #2 (permalink)
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Is there carbon on the valves of the other cylinders? That's really not a lot on them. Using a quality gasoline can help, as well as using a good cleaner, like Sea Foam sprayed into the TB's, left to sit and then start the engine.
The TB's are going to smell like fuel, since that's where the injectors spray.
Like you said, a check of the plugs can tell you how well it's running.
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Old 11-12-2012, 12:11 AM   #3 (permalink)
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Is there carbon on the valves of the other cylinders?
Nope. That's what's odd. It's only the middle cylinder. Thanks for the tip caddy. I am definitely going to run a cleaner through this bore to try to clean it up
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Old 11-12-2012, 12:41 AM   #4 (permalink)
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I wouldn't worry about it too much, like I said, there's not much there. How many miles are on it?
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Old 11-12-2012, 01:01 AM   #5 (permalink)
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I wouldn't worry about it too much, like I said, there's not much there. How many miles are on it?
2000, which isn't much. I'm not too worried but it is odd that it's there with such few miles on only one cylinder. I do want to get rid of it to see if it will help me get my throttle bodies synced.
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Old 11-12-2012, 09:56 AM   #6 (permalink)
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I think you need to ride your bike more. Seriously, put some cleaner in your gas tank and run the nuts off it.
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Old 11-12-2012, 05:01 PM   #7 (permalink)
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I think you need to ride your bike more. Seriously, put some cleaner in your gas tank and run the nuts off it.
I ride it almost everyday. It's 5 months old. I plan on running some gumout through it after I blow the valves with a small shot of Marine Power Tune tonight.
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Old 11-16-2012, 10:58 AM   #8 (permalink)
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The middle cylinder will run slightly hotter than the outer two so don't expect it to look identical because the conditions aren't.

I read your thread on syncing your TBs. Sounded like it was sorted. Is the bike still running rough? You also mentioned something about it spitting less oil. What was that about? Your valves look as though they have a bubbled residue around the edge rather than proper carboning. Evaporated oil? Either way the valves don't look bad.
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Old 11-17-2012, 02:40 AM   #9 (permalink)
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The middle cylinder will run slightly hotter than the outer two so don't expect it to look identical because the conditions aren't.

I read your thread on syncing your TBs. Sounded like it was sorted. Is the bike still running rough? You also mentioned something about it spitting less oil. What was that about? Your valves look as though they have a bubbled residue around the edge rather than proper carboning. Evaporated oil? Either way the valves don't look bad.

The throttle bodies seem sorted now after a long time trying to learn and adjust everything. When I got it back from the dealer it wasn't as rough. As of last night when I got them really synced and the throttle adjusted the bike doesn't shake at all and feels really smooth. The bike never spit oil, just sputtered, which these do, seemed to be excessive is all.

Yeah, overall the valves look fine just had a goo of sorts around the 2 intake valves in the 2nd bore. Not sure why. Perhaps overflow from the crankcase? Seems it sets up right about there. Anyway, I blasted it with Mercury Power Tune and went for a good hard run. The goo is gone from the valves in cylinder 2 but I do have some black carbon bits still around the backs of the intake valves. At least I think that is what it is.

It's running really well now. Gonna run a tank of gas through it, check em again tomorrow. See how it looks.
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Last edited by Moogs; 11-17-2012 at 04:04 AM.
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Old 12-15-2012, 02:06 AM   #10 (permalink)
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Be sure to use a "tier 1" gasoline.
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