| Author | Message | ||
     Cobradave93 |
Has anyone had fuel coming out the vent tube on the muffler even if the bike isn't running? Today I pushed the bike outside to do some work and left it out. The temp was 91, so it was fairly hot and humid. I looked at it after it had been out for about 8 hours and found the gas spot on the muffler (about 3"x6"). The bike has not been run today or yesterday. The bike also boils the gas whenever it is run over 85 degrees outside. Is this a tank vent problem? Any info would be helpful. | ||
| Spectrum |
Gas like any other liquid expands as temperature rises. If the tank were full when cold it would exceed the capacity of the tank as it warmed up. The vent is serving it's function by allowing excess vapor and liquid to escape. | ||
| Slypiranna |
The level of fuel in the tank could have been a player/not enough room left for expansion if over filled. If such was not the case, I recommend taking her in for a looksee. You are not alone on the boiling or bubbling going on in the cell...which is still up for verification as to which it actually is. Since I've only witnessed this in a HOT condition (three separate 11's)...I'm leaning towards boiling. I'm not one to believe that any of these conditions should be considered normal. Maybe inherent but not normal. Bottom line, get it checked out by a dealer to be sure...and post your experience for the rest of us to further understand. | ||
| Shwinston |
I live in Riverside, CA, and temperatures get pretty hot here. I've ridden in 100+ degrees, but I've never noticed fuel coming out the vent tube on the muffler or it boiling in the tank. Bike hovers around 200 degrees in the hot weather. I only notice it though when I'm stopped or in traffic, going slower. | ||
| Fresnobuell |
+1 Swhing...I just got off the bike about 15 minutes ago with coolant temps as high as the low 200s. No fuel smell, no boiling & no overflow. I even went back out to double check it. Again, like other issues, it seems some bikes are afflicted and others are not. I sympathize with you and wish BMC would address the issues...we are coming up on about 8 months since the release... | ||
| Nxtr |
Check your coolant level... I picked mine up yesterday, from HD of Jackson Mississippi; what a joke, mechanic told me about the new oil level check but that was all he knew. I asked if he had been to 1125R School, answer nope, another tech went but he quit, and he was going over the material he'd left and was waiting for dealer to send him to school. No clue how to set-up anything!!! Don’t even stock the oil filters… They have sold 3 1125R’s so far but the only Buell accessories they have are for tubers they even have brand new S2 thunderbolt jackets if you looking for one, woo-hoo. I digress temps yesterday were in the upper 90’s and it was a 105 mile trip back to the house. When I parked the bike in the garage, I could smell fuel and notice that it was dripping on to the muffler as you explained. Now mine is a May 08 build so no need for the flash, so I check the coolant thru the site window don’t see any, pull the pod and notice it was half way between full cold line and empty. This morning completely cold same way, so I added some coolant to bring it up to the full cold line (isn’t this part of the PDI???). I also set the clock, air pressure in tires and all the suspension settings, I wonder what the set-up fee I paid was for???, oh yes they checked the oil… I haven’t gone for a ride yet but will let you know if it helped… On the other note, I love this bike; I had a flat track Sportster, X1, and a VRSCR, none of these compare. “But what will kill this bike is the dealer support or lack thereof”. Now I am sure there are a lot of great Buell dealerships, but there are none other than HD Jackson within 100 miles in fact the next closest is 150 miles away I will try them next time… Sorry for the Rant with the advice, however as I stated before the 1125R is an excellent machine... V/R, Nick | ||
| Cobradave93 |
I know that liquid expands in the heat,but this tank had 35 miles out of it,so it was at least a gallon down. This is also after the new flash. | ||
| Chevycummins |
Cobradave93, My bike did the same thing with the gas drip on the muffler. Went round and round with BMC about it and got nowhere. I noticed mine would do it when riding in cold temps then shut the bike off and it would drip after a couple minutes. I also had the boiling gas and hissing from the tank vent hose. What I did was wrap the rear exhaust manifold and I used a wire tie to attach the tank vent hose to the bottom side of the clutch hose. If it does decide to drip it would just drip on the ground and not on the muffler. The reason it drips is the gas vapor cools in the hose and condenses then drips. | ||
| Cobradave93 |
Thanks Chevy, I'll also jump through BMC's hoops first ,but it will eventually lead to wrapping the pipes or ceramic headers (or both). It still dripped a large spot today even with 88 miles out of the tank. | ||
| Alans |
For what it's worth, mine 'bubbles/boils' the gas on a fairly regular basis. Today was typical. Ambient = 94F (independent source); Shutdown CT = 205F; about 40 miles on a full tank, so just less than 4 gallons aboard, I'd estimate; Chevron Premium Gas; CARB district in SoCal. Slight fumes and 'bubbling/boiling' sound about 3 minutes after shutdown. I've gotten to the point it doesn't particularly perturb me. I just leave the garage door up in case I have to push a flaming mass out into the driveway. I'm kidding. My understanding is that this issue is not in itself a danger. Tip: When your bike's hot, release the fuel cap very gingerly. Prepare to 'crack' it just a hair to vent the pressure, if it's built up. Shield your eyes, and vent it from the side of the cap away from you. Mine can vent up to a minute, when it's hot. Don't overfill the tank. On Cali bikes, it will ingest fuel into the Canister, and not vent properly. Then you'll really get some pressure. Mine sprayed gas out like a hot radiator. But then, I didn't vent it as described, just popped the cap off. The issue I DO have with this is that it's been hard to start the bike when it's in this state, i.e. you have to use the 'flooded' procedure to get it going. I wrote a letter to Buell, and delivered it through the dealer. I have to check back with them to see if they've heard anything. My advice is to report this condition to your dealer, and discuss it with them. If you are unhappy about it, let your dealer know, then follow up with them to see what's being done. Unless a number of us report this issue, I suspect it will never register on the radar, and so won't be readily--if ever--addressed. Talk to the dealer. | ||
| Unibear12r |
My bike is boiling fuel at a much reduced amount now even though the temps are a lot warmer. Still doing it but it's pretty much a non-issue now. The bike has had the reflash and is at about 1200 miles now but is otherwise mostly stock. And perhaps a summer blend of fuel? Might have been most of the problem all along as I've not had a repeat of the problems that I had during the early Spring heat wave. | ||
| Palerider |
I thought it was strange they would route the vent tube down to exit above the muffler. I noticed a depression on the air box cover that lined up with the vent hose. The hose fits snugly in the crevice and exits in the area of the rear shock.With the hose in place it looks like it belongs there. Maybe not a great place but it's not on the muffler. Or is this crevice just a mark from the plastic mold? | ||
| Unibear12r |
It's for the (vent) tube to the California model's carbon cannister. Empty on the 49er bikes. | ||
| Palerider |
Thank you Unibear12r for your answer. I got a longer piece of hose and routed it in that position over the air box and down the inside of the left passenger peg bracket. If it does vent it'll end up far from the hot parts. So far the tank does get hot but I've experienced no venting or pressure when I removed the cap(today, 88degrees and riding for 3 hrs.) |
