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-   -   Another charcoal canister thread (98' 900 SS/FE) - Sorry (https://www.ducati.ms/forums/57-supersport/724905-another-charcoal-canister-thread-98-900-ss-fe-sorry.html)

jbirdsaway2 Aug 15th, 2019 9:20 am

Another charcoal canister thread (98' 900 SS/FE) - Sorry
4 Attachment(s)
Few pictures and a couple questions. See if anyone can help. Just want to remove the canister and associated plumbing. I had a 95' 900 SS/SP, and it was configured differently. This one (98' FE) has some additional plumbing with an object about half way to the canister that I can't identify (see photos). Chances are that the owner of the 95' I bought did some work to eliminate this before I bought it, so I never saw it configured correctly... Anyway, bottom line, I'd just like some advice on how to cap the holes in the intake tubes (pictured) once I pull the hose (there's a mating screw with a small air hole it in... that needs to be capped) and where to route the line that comes from the gas tank once I dump all the superfluous plumbing. The check valve coming off the gas tank may have failed too, but I won't know until I get all of the plumbing disconnected from it. Thanks.

Pix are (hopefully) posted in order from gas tank to canister.


Buhgaboo Aug 15th, 2019 10:10 am

The random object is likely a one way check valve...keeps gas from spilling out...keep that one in place

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jbirdsaway2 Aug 15th, 2019 10:17 am

The silver item just above the tank is the check valve.... I'm talking about the white plastic object in the plumbing about half way to the canister. The while line is so blocked that if I pull the line off the tank after a short ride, it depressurizes so much it sounds like someone letting the air out of a balloon.

ducvet Aug 15th, 2019 10:24 am

Small short screws to plug intake manifold holes.
run hose after tank vent checkvalve overboard often through steering stem, make hose long enough that it exits bottom of engine and not pointed at your tires.

Thats how we set up race bikes, don't you need it in California for street bikes?

jbirdsaway2 Aug 15th, 2019 10:43 am


For the bikes to be "California compliant," you'll need the canister. BUT, once the bike is sold from the origin (at least for now), there are no emissions check on bikes thereafter. Only standard annual renewal of registration. Also, the bike came from out of state. California got sued years ago for charging people for bringing in cars from out of state... making them bring the vehicles into compliance with CA law. I recall my ex-wife getting a huge refund check from California DMV with an apology letter. AND, this bike is now 21 years old. If the law changes at all, which it's not currently scheduled to, it'll take a few years for that to be put in place... and at age 25, the bike is an 'antique,' and no longer subject to any standards. I want this stuff gone. It's a mess of tubing and does nothing. The canister is likely clogged and unusable anyway. I'll have to find some screws to plug the holes. Any idea what that white plastic object is in the plumbing?

hypermo Aug 15th, 2019 11:15 am

1 Attachment(s)
AS some one already said its a one way check valve they make it white one on
side and black on the other so you know how to install it.

Lelebebbel Aug 15th, 2019 11:27 am

Keep the rubber lines and nipples that connect to the intake manifolds in your parts box. They will come in handy when you want to vacuum sync the carbs

ducvet Aug 15th, 2019 11:51 am

A check valve makes sense to me to be honest I have never looked into it just removed them. Totally get cleaning up the hoses BUT.... on many bikes I keep the hoses that go TO the canister from the manifolds and after they tee together I cap the single line. This single line makes fogging the motor a very easy job as you simply spray fogging oil into the one hose while running the bike and quickly and efficiently fog both cylinders.

Air cooled bikes are the wild card because we all like them as bare as possible so the choice is no hoses or easy fogging. Given your location if you do not run race fuel or store your bike for months at a time you may not need to fog anyway.

jbirdsaway2 Aug 15th, 2019 2:53 pm

Yea... the riding season in N. California is.... about January 1 to December 31. Haha. Just kidding. There's a few cool days... and a couple rainy ones. I think I'll just dump all of that and put a simple check valve in to keep it from dumping gas all over the place. Cheers everyone!

jbirdsaway2 Aug 15th, 2019 2:56 pm


Doesn't it have to flow both directions? The check valve you posted says it goes one way only... I think the check valve on this bike is supposed to: 1. Keep gas from coming out when the tank heats up from the engine and sunshine (expansion), and 2., replace air in the tank as the fuel level decreases. It'll need to be a two way, or nothing, me thinks.

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