| Author | Message | ||
     Boogeyman |
I'm getting pretty bad gas drips from the vent valve tube on the Uly when parked after riding. I leave it outside the garage until it stops. If I put a check valve where the vent line connects will anything get screwed up? Will pressure build up and cause fuel pump seal issues or something similar? The check valve would keep gas and fumes from coming out, and allow air to come in as the tank is emptied during riding or as the gas cools. I was thinking this one from cycle gear...http://http://www.cyclegear.com/eng/product/Gas_Ca p_Vent_Tube_with_Check_Valve/web1007504 The service manual indicates the fuel tank vent valve is basically a tip over valve, keeping gas from spilling in an accident, but allows gas vapor to escape when upright. This is what mine is doing very well! I have not lubricated the valve as has been mentioned in older threads. I have not been overfilling, as it will drip with approximately 1.5 gallons left in the tank. I'm okay with opening the gas cap slowly if pressure builds. Thoughts and opinions appreciated, Thanks! (Message edited by boogeyman on August 09, 2012) | ||
| Froggy |
What is going on is normal, but if it really bothers you put the carbon emissions canister on that the California bikes have, it will absorb the fuel and send it back to the throttle body. | ||
| Prior |
They're worse with less fuel in the tank. Same engine heat, with less fuel mass in the tank leads to hotter fuel and more purging. After a particularly hard ride on a hot day, I top the tank off before coming home to cool the tank down a bit and let it sit outside for a few hours before rolling the bike in the garage. It never fails, after a long, hard ride in 100 degree heat, if I pull straight into the garage and park the bike and shut the garage door, that's the day Heather parked the car in the garage with the windows open... Her drive to work the next morning with the car reeking of gas isn't so pleasant. | ||
| Jomartijr |
I had this happen to my 2007 935 mile used Uly when I first got it in 2008. After a lot of head scratching I extended the over flow tube with a 4" piece of clear vinyl and placed a small "hump" in the middle of the extension. Now when this happens I see bubbles from venting vapor but the gas flows back downhill and forward. Simple fix and works. | ||
| Boogeyman |
I'm going to have to do something. I think it is doing it bad enough that I can smell gas every now and then at stoplights too. If I smell gas I want to know something is actually wrong, not just assume my vent valve is letting the fumes out. I will try to fix it with the "hump" setup. If that doesn't get it I'll try the check valve and report back... | ||
| Thumpthump |
I had the same problem after removing the charcoal canister (didn't like the look of the can), so I put it back on and it doesn't smell at all now. I'll live with the ugly can. | ||
| Boogeyman |
Update - I tried the little check valve thing, that's a bad idea. It still let's fumes out. If you have a windshield the fumes get sucked up behind the windshield into your face. After that I tried the extra bit of fuel line on the end of the existing hose. I extended it back past the rear footpeg support and put a little dip in it. Still evaluating that. I got a feeling I'm going to end up at carbon canister... | ||
| Dio |
Before parking for the day, I just loosen the fuel cap and place it on top of the filler opening (not seated), until every thing cools down. Then put the fill cap back in it's proper position. This allows every thing to cool down without forcing liquid gasoline out the vent hose. Be sure that the fuel level is below the bottom of the filler neck, otherwise it may overflow while the cap is loose. The problem with fumes is worse when liquid fuel is venting on the floor, as opposed to just vapor. | ||
| Tootal |
I wonder what's different? My 06 has never had any problem like that and it's got 33,000 miles on it. |
