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Evap removal from V7III

Discussion in 'V7/V85/V9 Chat & Tech' started by Godfrey, Oct 17, 2017.

  1. dseevv

    dseevv Just got it firing!

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    Just purchased the ECU unit, and am currently trying to figure out what all I am removing according to aforementioned information/diagrams (thank you all for what you have already provided). To be clear, I think the cable I need to remove is shoved up underneath the gas tank (circled in yellow), and the UNIT itself is behind the oil pan?

    49A664FB-80F6-4D47-899B-1BF8672EB648.jpeg F492DD59-6EB7-4257-A1F5-0FE7370450C3.jpeg
     
  2. Alex Capasso

    Alex Capasso 2018 V7 III Special

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    Just did this myself and had a lot of hesitation. If you’re anything like me, it may be helpful for you to work backwards. Reach under the bike, and give a little tug on the hoses connected to the canister. Doing that while watching for the motion of the hoses further up helped me to trace the lines back up and confirm what’s what.
     
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  3. Dave-DC-rider

    Dave-DC-rider Just got it firing!

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    Thanks for posting this procedure with pictures. I bought a used 2017 V7iii last summer. I've noticed some tank suck when taking the gas cap off and it seems to struggle a little to find its idle when I first start the bike (and sometimes when the bike is hot.) The idle is now about 50RPMS lower than it had been. Do you think removing the EVAP will help with this? I'm thinking about trying it but I'm a little worried about screwing something up. Do I plug the tank breather hose after cutting it? I thought I needed that line to be open in order for the tank to breath? That's the only part that's throwing me. How's your bike holding up 2 year later?

    EDIT: I've done some more reading on this procedure since I posted my question and everything seems to make sense now. As far as the breather hose, would it work if I just remove the clamps that hold the check valve in place on then stick a small fuel filter or something that connects the two halves and lets air flow through... leaving the other end attached to the EVAP canister? Hope that question makes sense. It seems like the evap can would catch any gas that might splash into the hose and reduce fumes if I leave it attached and just replace that check valve thing with some sort of hose connector. Thanks!
     
    Last edited: Aug 1, 2020
  4. Dave-DC-rider

    Dave-DC-rider Just got it firing!

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    Thanks for posting those pictures, I'm getting ready to disconnect my evap canister. What did you use to connect the breather hose parts after removing that check-valve thing? And what's the easiest way to get those clamps off? I'm going to do the same thing and leave the breather hose connected to the canister. I'll remove the check valve and replace it with some other connector that allows air to flow. Also, why did you use a 1/4 to 3/16 connector, are the hoses on either side of the aray and green check valve different sizes? Thanks.
     
    Last edited: Aug 1, 2020
  5. aproud1

    aproud1 Tuned and Synch'ed

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    The hose is a different size. You can get the 3/16" into the 1/4" hose with a little work(I used a dab of vacuum grease).

    I originally turned my canister into a vent filter like you're describing. I eventually just got rid of it all and left a brass coupler on the vent hose. Tied it up so that if fuel does vent, it would dump on the ground mid bike. During operation I really don't see that as an issue since you should have negative pressure in the tank.

    The canister can get in the way when I jack up the bike to work on (nose chock and hydraulic lift mid bike on the bar just behind the canister). Haven't had any leaks and I've found I only smell gas after a good ride, the bike is parked in the garage and the tank is full. Not a strong smell but you can smell it. With the canister on I still smelled fuel under the same conditions, maybe a little less. I'm of the opinion that a garage should have a smell of fuel present.

    Like you, I had a lot of negative pressure in the tank. After I initially bypassed, Idle was smoother.
     
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  6. DeadEye

    DeadEye GT Reference GT di Razza Pura

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    Check Engine Light - Or one of the new fangled telephones.
     
  7. DeadEye

    DeadEye GT Reference GT di Razza Pura

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    My perspective on the Evan can and SAS pump modifications are to know/have better control over what’s going into the intake track.
    I am guessing that with the new tune in place, the maps that have been worked out *should* be working with fewer variations on what’s getting dumped into the manifold from those two things and be more in control on what’s happening based on the air / fuel that it manages going in and the readings it’s getting from the sensors on the way out...
     
    Last edited: Sep 2, 2020
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  8. Wildroamer

    Wildroamer Tuned and Synch'ed

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    I have done both mods, but left the canister in place for vapors and drips. I'm considering methods to lose that worthless canister, and instead having that line end in some smaller trap that can naturally evaporate over time. I'm envisioning the line glued to the inside of something like a cigar holder, with felt at the top...
    Hmm...
     
  9. aproud1

    aproud1 Tuned and Synch'ed

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    I used the canister as a filter for a while. Eventually removed completely and left the vent line pointed down with a brass nipple in the end. Have never seen any fuel vent. Have smelled vapor. Thats it. I park in a concrete garage attached to the house and any fuel spilled is very noticeable.
     
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  10. Jonny G

    Jonny G Just got it firing!

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    I know I'm years late to this conversation - and I apologize if this has already been answered, but I wasn't able to locate an answer to what I am looking for. Would replacing the faulty valve with one that actually works be worth the effort? I note in another post you mentioned spacing and sizing issues with the EVAP system and am wondering if that is the reason a valve replacement isn't suggested?

    I would like to perform this at some point, but I'm only a few weeks away from the first service and would hate to have the dealer tell me these alterations caused my warranty to be voided.

    I wonder if anyone has complained about this to the dealers and I'd be curious to hear how the dealers have responded...
     
  11. DeadEye

    DeadEye GT Reference GT di Razza Pura

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    Personally, I would wait until after the first service.
    They don't need ANY more reasons to whine...
     
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  12. aproud1

    aproud1 Tuned and Synch'ed

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    I couldn't wait and modded before my first service. I tried to be subtle, turned the can into a filter and put an inline plug on the leak side. Pretty much looked stock unless you dug into it. After my first service my dealer told me " Excellent modification!". Afterwards I just pulled it all out.
     
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  13. DeadEye

    DeadEye GT Reference GT di Razza Pura

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    That’s the difference- some dealers are looking for any excuse to wash their hands of any warranty work.
    Others are quite practical.
     
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  14. Jonny G

    Jonny G Just got it firing!

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    Yep - I'll gauge how they respond when mentioning this... I don't know how many dealers there are in the tri-state area, but based on the number of Guzzis they have at the garage at any given time, they get a lot of service work - therefore, they probably have a stock response ready when a rider brings up EVAP system issues.
     
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  15. Godfrey

    Godfrey High Miler GT Famiglia

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    When I had my first service done, when I went to pick it up, the mechanic said something like, "I see you EVAP system fell off. Funny, they do that frequently. Well, good riddance ... They do nothing but cause problems anyway." :D
     
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  16. Mayakovski

    Mayakovski High Miler GT Famiglia

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    I heard the same thing when I pickup mine up after it's first service. Almost the exact same wording.
     
  17. DeadEye

    DeadEye GT Reference GT di Razza Pura

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    Looking around under the bike today,
    A question for anyone who removed the evap canister, did you do anything with the bracket?

    It looks pretty heavy duty for holding a little can ?
    Can you say overkill !
     
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  18. Bert Remington

    Bert Remington Tuned and Synch'ed GT Famiglia

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    I have a 2019 V7 III Stone with 900 mile service just completed. Several times I've ridden from sea level to 6000ft and back during our 90-100 degree days. Fueling going up is fine but coming back down to about 2,000 feet I notice the engine isn't quite as smooth as usual. Throttle response is still good, especially since removing cable slack. And thanks to this thread I noticed the swoosh when removing the gas cap.

    The story I've read so far was useful but seemed incomplete. When people take their cars to their local Autozone, et al for a CEL, the first question is: Did you fully tighten your gas cap? If Yes, the second question is: Is your car more than five years old? If Yes, they sell you a gas cap and the problem often goes away for another five years.

    So I examined my gas cap and found this:
    Gas Cap Valve.JPG
    It's a unidirectional valve flowing outside air INTO the gas tank via the keyhole. I re-assembled it without the spring.

    As I recall from disassembling the three-port canister on my Royal Enfield (to downsize, not remove it) it included a simple flap valve. As depicted on the emissions sticker, the MG canister is three-port and I suspect has an interior valve too (there is what looks like a fourth port but no connections are shown).
    Emissions Label.JPG
    The gas cap spring is the only change I'm making at this time. I'll report back in a few hundred miles.
     
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  19. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Things like this are what this site was founded on. Thanks for posting. For the world markets that don’t have evaporative emission requirements, they vent through the gas cap like yesteryears. This is in essence what you’ve done.
    The “pressure valve” Is the problematic part, and to those with sensitive nostrils, leaving the fumes to vent through the evap can (not under vacuum), is most ideal.
     
  20. DeadEye

    DeadEye GT Reference GT di Razza Pura

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    Reading that sticker would make me think that they engineered the bike to meet all 50 states north American emmisions standards
     

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