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Old 05-17-2019, 07:20 AM   #1
maidenfan84
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Why remove emissions cannister?

The cannisters are pretty standard on everything now it seems, but wondering why people decide to remove them on their bikes? Anything to gain aside from aesthetics? Not sure I understand the point of people doing that.

Last edited by maidenfan84; 05-17-2019 at 07:21 AM..
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Old 05-17-2019, 07:23 AM   #2
jeosbor1
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Canister, hoses, valves and crap was worth about 5 pounds of weight coming off the bike.
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Old 05-17-2019, 08:04 AM   #3
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And often the stuff gets in the way when you are trying to work on the bike. Along with the cannister filling up with fuel on tip overs....
But it's illegal to remove them. Most shops won't now.

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Old 05-17-2019, 08:17 AM   #4
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Simiplifies things, weight savings, and if you're planning on doing a proper tune (for offroad use of course), especially with the cat removed, you'll need to remove the emissions crap.
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Old 05-17-2019, 08:17 AM   #5
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if you overflow the tank, fuel can enter the canister and it can be a source of hard starting.

Had an R1100RT that started much more easily once I removed it.
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Old 05-17-2019, 09:18 AM   #6
maidenfan84
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Only been around bikes older than the last few years before it was a 50 state standard across the board and being from the Midwest, we never had to deal much with bikes that have the emissions set up on them. Don't even know how people remove them, for off-road purposes, since it seems like a rats nest of tubes and connections. Interesting to read the responses about them filling up with fuel, causing hard starts, etc.
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Old 05-17-2019, 09:23 AM   #7
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depends on the bike.

On some bikes it's a giant black brick on the side that is ugly.

On some bikes it affects fueling and can cause rough running, stalling, hard starting.

On others it is not a problem and hidden, but people remove it anyway because emissions are cool.
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Old 05-17-2019, 09:44 AM   #8
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because you hate clean air. Or so I'm often told by bay area barf residents in regards to other vehicles. Typically the same ones who complain about farmers growing almond trees.
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Old 05-17-2019, 09:46 AM   #9
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On my Tiger 800 the kickstand is the first hard part to drag on left hand corners. It's possible to move it inboard of the frame to gain more clearance, but the evap canister is in the way. So that's why I removed it.
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Old 05-17-2019, 12:41 PM   #10
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Remove and store all your emissions in a box marked Foo Foo Ra because
you may be required to reinstall all of it in the future... meanwhile
enjoy your ride because now you saved weight and plug possible
troublesome air leaks...
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Old 05-17-2019, 02:13 PM   #11
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Originally Posted by Busy Little Shop View Post
Remove and store all your emissions in a box marked Foo Foo Ra because
you may be required to reinstall all of it in the future... meanwhile
enjoy your ride because now you saved weight and plug possible
troublesome air leaks...
Yep. Save all the parts.

I pulled both the air injection system and the gas fume recycling systems off my ST1100. The motivation was that it was running like crap and I figured it was an air leak somewhere in the emissions stuff. Rather than chase it down, I simply removed it all, plugged the injection ports in the exhaust ports (GSXR750 block off plates fit perfectly) and plugged the various vacuum ports in the carbs and other places. Instantly cured the problem.

I gave my charcoal canister to another ST rider who had plans for it, though I never heard if he actually followed through. He was continually pissed with people who tailgated him so what he was going to do was modify the canister and mount it in its usual location. The twist was that it would now be an oil reservoir and with some plumbing, a small pump, and a switch on the handle bar he could, with the push of a button, pump oil from the tank into the exhaust system at the heads (old air injection ports) and create a smoke screen behind him.

I would have loved to have seen that.
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Old 05-18-2019, 11:14 AM   #12
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I remove the charcoal canister on all my bikes. Not just for weight savings and having a little bit more room but the main reason is the carbon can backwash into your gas tank and causing hard start ups or stalling. Makes the fuel filter dirty.

You have to follow the vacuum line and remove the carbon canister and purge valve and you'll notice the tube ending at a T. You must cap off this vacuum line with a plug. The other line that's coming from the gas tank must be run down to the bottom of your motorcycle so it can properly drain. On a very hot day you might get a few drops of gas on the ground. There's a YouTube video on how to do it properly.

Definitely have to do it on my track bike to get it properly tuned and had to remove all that emissions crap.

Last edited by Paulo666; 05-18-2019 at 11:20 AM..
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Old 05-18-2019, 10:46 PM   #13
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I've had carbs issues because the valve was broken,was a pain to find out.most c.a. emission is not o.e.m and is just thrown together on older bikes
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Old 05-19-2019, 07:10 AM   #14
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Don't bitch about the environment if you remove the canister....just saying.
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Old 05-19-2019, 08:48 AM   #15
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A few thousand riders removing the emissions systems for racing weight loss or because of vacuum leaks, vapor ingestion troubleshooting and whatever is not going to significantly impact air quality. However, it is illegal to do that on a street bike so save the parts for resell.

I am old enough to remember when emissions standards first hit cars and motos back in the 80's or so. In order to meet the requirements engineers just slapped on all sorts of ill-designed contraptions on existing motors and they ran like crap and caused all sorts of reliability problems. I'd have no problem removing or bypassing this jerry-rigged junk on an older bike from the 80's or 90's so it will run properly.

That said, for any bike born after 2000 or so the emission systems were integrated into the design of the motor and generally work fine and cause no problems. Removing emissions components from a modern street bike has no real positive benefit and can actually make the bike run bad, so I recommend that you leave it alone. People learned from the early history of emissions control that removing it was a benefit but the situation has changed but they have not revised their understanding.
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