carbon fuel tank vent cartridge
 

I fitted a new Yuasa battery to SV AL7 today and was trying to squeeze the standard tool kit, a plug-and-go puncture repair kit and some 16 gram CO2 cartridges ( to re-inflate the tyre if needed ) into the space under the seat, without much success - I am sure they all fitted under there before I transferred the kit to the car for the winter ( only really use the bike from March to October normally). My eye fell on the carbon fuel vent filter, which takes up an awful lot of room under the seat. Has anyone removed / relocated theirs to make room under the seat ? It does not appear to be part of MOT checks.

Re: carbon fuel tank vent cartridge
 

I haven't removed it myself but I can't see how it would cause a problem as there isn't a sensor connected to the carbon can. I think you could probably join the tubes to and from the can with a connector just to keep things tidy.

Re: carbon fuel tank vent cartridge
 

the can is only to stop hydrocarbons from vented gases entering the atmosphere. remove it or get longer hoses and re-locate it.

Re: carbon fuel tank vent cartridge
 

Cheers,

The can takes up a big chunk of useful storage space under the seat...

Looking at the canister it has 3 x 6.5 OD plastic connector stubs sticking out, with two pipes connected and the third connector has a rubber 'thimble' cover on it. AL7 has a plastic extension behind rear seat with rear light and the number plate hanging on, the can would cable tie up under that, but would get road crap on it. I have some 6.3mm silicone rubber tubing already and can get 1/4" barbed tube joining pieces and some spring hose clips off fleabay ( can use cable ties to clamp unpressurised hose onto barbed joiner, but a bit shonky ). Will have another looky to see if a cleaner place to mount it.

Re: carbon fuel tank vent cartridge
 

i would dbbl check that it is indeed for the fuel tank breather. if not it might be part of the vacuum system.

Re: carbon fuel tank vent cartridge
 

This is the part, not specific to SV650 models, but a generic part for venting the fuel tank. In USA they have had this for a while, the fuel tank cap does not have a breather hole in it, everything going in and out of fuel tank has to pass through this can. They do give instructions to remove the can on SV650 riders forum in USA, but specify if can is removed and pipe blocked you need to fit a breather type cap to fuel tank.


If you click to second photo on the ebay site, there is another hollow stub on rear of the can, I had a look into it and there is a steel mesh inside, so obviously another exit or entrance to the can, I will try to face that downwards and will have fit a piece of hose to that as well to stop any crud getting in if i do mount it under tail tidy... I think I will bite the bullet and extend the pipes and relocate it, that wasted storage real estate is too good to miss.



https://www.ebay.de/itm/151305284179


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Re: carbon fuel tank vent cartridge
 

if one end comes from the fuel tank then where does the other hose go. it might just be a case of adding a barbed straight joint in place of the can if there is enough wiggle room on the hose.

Re: carbon fuel tank vent cartridge
 

One hose comes from direction of fuel tank on LH side of bike ( but cannot see any connection either side of filler cap boss ) and the other one goes down to the RH side of bike down towards rear brake reservoir, but cannot see end of pipe ( my bike ii on ABBA stand ATM with RH side of bike close to garage wall so cannot get round to see properly ). It will be off the ABBA stand this week, already replaced battery and blown the tyres up - they had only lost a few PSI...


Apparently there are two kinds of EVAP systems, passive and dynamic. There are purge valves and all sorts of ****e on dynamic systems to allow fuel vapour from tank into inlet manifold etc, probably fitted to high end bikes like Ducati and BMW.. The Suzuki one looks like a simple passive system where it allows fuel vapour from tank to pass through carbon granules before being vented to atmosphere, and can allow air in and out of tank to make sure tank does not over-pressure or develop a vacuum inside. With either sort of EVAP system the fuel tank gets a sealed cap, plenty of advice on USA bike forums to remove / plug up EVAP but then you need to buy and fit a vented fuel tank cap, USA riders have had this crap on their bikes for a long time now, we are only just getting it.

Re: carbon fuel tank vent cartridge
 

looks like its a closed system

https://i.postimg.cc/1R0cqbmh/Can.jpg

i personally would just take the can out and join the two hoses together

Re: carbon fuel tank vent cartridge
 

Isnt 5 in the diagram the inlet/exhaust of the cannister? If its removed then the other two pipes (9 & 11) coming from the system can just vent to atmosphere but of course will give more petrol smell...

Re: carbon fuel tank vent cartridge
 

My 2023 Transalp has an evap cannister. I assumed it was passive but it isn't. When the engine is off vapour vents from the tank into the cannister. Once the engine is warm a valve opens and allows the vapour to empty into the air intake.
https://i.postimg.cc/C11wDq9c/Screen...-Office-01.jpg
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Re: carbon fuel tank vent cartridge
 

No poppet valve in the SV650 system ( that I can see anyway ), and the little central spigot in the opposite end to the two pipes is the vent, it is open with a metal mesh inside. The item labelled '5' in Bibio diagram is closed off with a rubber cap, so this looks like a generic EVAP can where Suzuki does not use one of the connections.. I have a feeling newer EURO 5 bikes get the extra valves and complication. Things are getting more complicated all round, now the greenies want ban any garden tool with an engine, despite the fact the average domestic mower is probably used for 30 minutes a week for 6 months of the year..... an average of 15 minutes per week ..... Also despite the fact that the battery on a cordless mower was made in China, traveled halfway around the world on a ship to get here and is full of toxic chemicals that cannot be recycled..


My plan is to re-locate the canister using longer pipes, but leave the connections that same. I already ordered the bits from fleabay, ( hose joiners, spring pipe clips - and already had some silicone rubber tubing the correct size which is about 6.3mm / 1/4 inch )

Re: carbon fuel tank vent cartridge
 

OK, I figured it out. The 2016 onwards AL7 ( EURO 4 ) does have a purge valve, mounted under the fuel tank ( see attached PDF photo ) the braid covered hose coming in from Right of photo is one of the pipes from the charcoal EVAP canister. Looking down on the EVAP canister as it is mounted under the seat the hose to the purge valve is the LH hose ( on the nearside of bike ) and the fuel tank breather hose is the centre hose, the RH connection is blocked with a rubber cap held on with a spring type hose clip. With the fuel filler cap closed, if you blow into the fuel tank breather hose you can build up pressure in the fuel tank which blows back out of the pipe when you stop blowing, so that is just a simple connection from the top of fuel tank to the EVAP. The other pipe from canister will not let you suck or blow, this is blocked off by the purge valve ( solenoid valve ) under the fuel tank that opens the pipe to one of the inlet manifolds or maybe even the airbox, so that when engine is running any fuel fumes get sucked back into the engine to get burned. I tried blowing into every connection stub on the EVAP canister ( including taking the rubber cap off the sealed one ) and every port is connected to every other port, including the port on the rear of the canister ( this central rear port will be the normal path for fumes out of the fuel tank when all hoses are connected to EVAP canister and the engine not running - when the purge valve is closed ). What I need now is a 'T' piece hose joiner to connect the two original pipes together and then route a third pipe out somewhere out of the rain ( because water may get sucked into the airbox or inlet manifold if any water gets into end of new tube ). Looks like you cannot simply join the two existing tubes together to bypass the EVAP, because the tank would then try to vent pressure straight into the normally closed purge valve when engine not running. This would cause pressure build up in fuel tank. I have got a 'Y' hose connector and a 6mm connection inline fuel filter off fleabay to route the new exit pipe through to stop any crud being sucked into the purge valve / inlet manifold.... Happy days.

Re: carbon fuel tank vent cartridge
 

See new post, after more investigation it looks like SV650 has a similar system with a purge valve - every day is a school day...