removing the EVAP from my new v-strom 650 - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 15 Old 07-07-2019, 05:23 PM Thread Starter
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removing the EVAP from my new v-strom 650

and have question, on most bikes they just plug airbox hose and route the tank hose down along with the other drain hoses, but on some they plug both evap hoses, and unplug one of the drain hoses which is down there already blocked allowing tank to breath. How is with the v-strom?

Last edited by offnote; 07-07-2019 at 05:37 PM.
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post #2 of 15 Old 07-07-2019, 07:21 PM
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Probably not necessary to remove Evap on Gen2 (2012) and later unless its causing a problem which seems unlikely on a new bike and should be fixed under warranty if it is.

On earlier bikes the only problem it would (rarely) cause is if the charcoal cannister got saturated with fuel then the motor could be hard to start due to overly rich air/fuel mixture. On 2012 and later bikes Suzuki added an ECU controlled "wastegate" valve (see the throttle-body fiche for your bike) that blocks evap flow until the motor is running and the bike is at speed to prevent hard starting.

If you still want to remove it you'll have to find a "cannister delete" diagram online and compare that to the specific hose routing on your bike to figure out what to plug, remove or bypass, etc. There should be a sticker on the storage box under the seat of the hose routing. It is complicated but can be done.

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post #3 of 15 Old 07-07-2019, 07:42 PM Thread Starter
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Originally Posted by dmfdmf View Post
Probably not necessary to remove Evap on Gen2 (2012) and later unless its causing a problem which seems unlikely on a new bike and should be fixed under warranty if it is.
thanks, but - firstly I need space under the seat and secondly I read and have seen charcoal can get back to the fuel filter and clog it. Good enough reason for me to remove it.
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post #4 of 15 Old 07-07-2019, 10:28 PM
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firstly I need space under the seat and...
Maybe the Gen3 is different but on the Gen2 and Gen1 'Stroms the cannister is behind the side panels not under the seat. That is the only thing that really takes up any space, the rest of the system is just hoses snaking around under the tank/airbox/throttlebody.

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...secondly I read and have seen charcoal can get back to the fuel filter and clog it. Good enough reason for me to remove it.
That is not even possible on the 'Strom, maybe that could happen on some other (older?) bikes but I am skeptical even of that. The EVAP (evaporative emission control) system is for processing fuel vapors not liquid fuel and does not involve the fuel filter whatsoever.

NB: If you do remove it save the parts, some states are inspecting emissions on registration or title transfer.

Pink Floyd: And did you exchange a walk-on part in the war for a lead role in a cage?
---------------------------------------------------------------------------------------------
Current: 2014 V-Strom DL650 ABS Red
Next Up: ?
Past: Suzuki: DL650AK7, GS400; Honda: CB125, Express 49cc

Last edited by dmfdmf; 07-07-2019 at 10:30 PM.
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post #5 of 15 Old 07-08-2019, 10:02 AM
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Of all the bikes I've had with the canister none has clogged the can with fuel and I fill to the brim each fill-up. How folks had problems is a mystery.
In the grand scheme of things, charcoal canisters are supposed to help clean up the residuals of a gas engine operating.
Removing items that help us breath less polluted air is counter productive.
This is a reminder from your conscience to not F with things!
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post #6 of 15 Old 07-08-2019, 11:04 AM Thread Starter
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reminder - topic is NOT about if we should remove evap or not that was subject on other posts.
notacop and ehart814 like this.
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post #7 of 15 Old 07-08-2019, 11:29 AM
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Hopefully you will get a post that gives detailed instruction to accomplish your task.
Doncha just hate posts that suggest you shouldn't tun with scissors?
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post #8 of 15 Old 07-08-2019, 11:49 AM Thread Starter
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BTW cannot believe nobody did it yet on v-strom, there are plenty of examples on tube about evap delete on bmw or ktm bikes.
For many rider removing SAS, EVAP are the very first mods what they do.
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post #9 of 15 Old 07-08-2019, 01:20 PM
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BTW cannot believe nobody did it yet on v-strom, there are plenty of examples on tube about evap delete on bmw or ktm bikes.
For many rider removing SAS, EVAP are the very first mods what they do.
Probably because its not really necessary ('Strommers are a practical bunch). I don't really care if you remove it but unfortunately you'll have to figure it out for yourself because it's not common. If you do it you could post your findings here for anyone who wants to follow your lead, this is how forums work. Be the change you want to see. Racers remove the EVAP but mainly for weight savings so look for EVAP/cannister delete for an SV (same as the DL motor) or at least a GSX-R (same brand) which are commonly raced and will have a EVAP system similar to the 'Strom. Compare the diagram with the sticker under your seat to figure out how it works and what to plug, cut, remove.

BTW, there is a history to why people remove emissions components (EVAP, PAIR, EGR, PCV, timing limits, etc). Way back in the '80 and 90's when emissions laws were put in place the car and motorcycle manufactures didn't redesign the motors they just slapped on poorly designed junk to meet the standards. This made cars and bikes run poorly and have driveability issues and people quickly learned that removing the junk made things better. EPA's counter move was to slap huge fines (+$10,000) for messing with emission systems. Those laws are still on the books (with exceptions for racing). Fast forward 20+ years and engines have all been redesigned with emission systems integrated into the motor so they don't really cause any problems unless there is something wrong. Unfortunately, many people are stuck in the '90's and think there are benefits to removing emissions components but now removing them can cause motors to run poorly and have driveability issues so the situation has flipped. (I am ignoring the impact on the air quality which is a separate issue).

Pink Floyd: And did you exchange a walk-on part in the war for a lead role in a cage?
---------------------------------------------------------------------------------------------
Current: 2014 V-Strom DL650 ABS Red
Next Up: ?
Past: Suzuki: DL650AK7, GS400; Honda: CB125, Express 49cc

Last edited by dmfdmf; 07-08-2019 at 04:03 PM.
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post #10 of 15 Old 07-09-2019, 07:42 AM
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Hopefully you will get a post that gives detailed instruction to accomplish your task.
Doncha just hate posts that suggest you shouldn't tun with scissors?
To be fair, running with scissors may cause harm to the runner alone. Dumping fuel vapors into the atmosphere effects everybody. If we all rationalized that our little contribution to air pollution won't make a difference, then we'd all be fooling ourselves. That's exactly how it works. Millions of individual vehicles each making a small contribution.
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