bottomless tank on my 94 VFR750?

So I stopped to fill the tank on the Viffer yesterday. The light had not turned on yet, so the manual tells me that I had about .92 gallons in there. And I added 5.20 gallons on top of that.

Smart readers will notice here that the OEM manual says the tank is only 5.5 gallons in total.

And yet, as I added the gas, it never REALLY got up to the top. It would fill up to the inner ring that's inside the exterior locking cap, then when I let off the nozzle, it would...disappear somewhere after a second or two. So, being hard-headed, I'd simply fill it again. This went on & on until I saw the dial and gave up.

There are no leaks anywhere on the bike. No drips or puddles on the garage or when riding.

So...where did it go? The garage WAS full of gas fumes this morning when I opened the door, but still no leaks or puddles.

 

U prolly have a California emissions bike that has a charcoal canister. Bet u 100 bones that beast is now full of gas lol I will be down that way in a few days to collect hahaahah

 

Nope. Bought it in VA in 94 when I lived there. Shall I tell you where to send the check, or do you prefer Paypal?

 

oooh..burn. Yeah, my car does that as well. I have a 19 gallon tank and when it's real empty I can put in 21 gallons....and the bike is the same way. I'll be showing 1 flashing bar and put in 5.7 or 5.8 gallons in a 5.5 gallon tank. I think it must be double lined and the extra goes in there. Or the radiator overflow and slowly gets sucked back out of there...

 

Ouch. Will b in sacremento around 5 am had to fix Dern spell check Sux

 

^^ what^^ ?

 

When was the last time the service station had their pumps certified for accuracy? Ahhhh yes the great American rip off!!!! Naaa they wouldn't do that................

 

OK. Something is up. The garage is filled with gas fumes so badly that they seep into the house during the night. Every morning I come downstairs to a strong gas smell, and have to crack the garage door right away. This whole thing was over a week ago, and I have burned thru 2 tanks by now (on both, I stopped well before the filler neck so it didn't happen again.)

Any idea what's going on? Is there something on this bike that fills with gas that I don't know about? Can't take much more.

 

How your oil smell? Maybe your float needles are shot? BTW in my old residence both bikes would emit petrol smells after rides, mainly because they were piloted by Lucifer, under less spirited rides they tended to stink less!

I replaced float needles on the Viffer and it still stinks, new OEM fuel pump as well, no leaks wut so eva, bikes stink sometimes. You should not have vapors coming into the house, its a bad health issue. I had an air handler in my old garage (wut they do in FL) and the place where you inserted the filter had its cover missing. I found the cover and used some aluminum tape around it so it was air tight. The petrol smells stopped coming into the house but if you walked out to the garage, you would smell a nice motorcycle smell :smile:

Agreed about the calibration of the pumps. I know what 4.6 gallons of gas looks like on the Viffer or 4.0 on my other bike. Had a CA bike with the charcoal canister garabage and if I filled it to the upper neck it would not start, almost like vapor lock. Real MO-FO / that bike was such a fucking turd, I wont rant about it, but you get the picture....Loved them Zed X 10s of yore...Cheers, and gud luck

 

On a non-CA bike? Not sure what this is...any idea how to drain/fix it and where it is/what it looks like? Is this a common thing? never had it happen before.

 

Damn. I JUST had the tank off last week installing the new fuel indicator inside the tank. So...one line goes to the bottom of the bike (or a carbon canister) to drip off excess fuel. The other (probably the bigger hose?) runs back to this valve cover to put overflow fuel back into the engine...is that what it does? Maybe one of the hoses slipped off. I'll check it after work today.

The air filter is a K&N, and probably needs a re-oiling or at least a check anyhow.

I have noticed that the first start every day, with the choke wide open, used to result in a one-crank fire up, and the normal high, fast idle. Now it's a multiple crank start and run, but no high, fast idle. Hmmm.

 

Oh...anyone know the VIN series for CA? Maybe it's in the OEM manual....let me check...

 

Ahhhh...I have seen that small hole inside the filler cap and wondered where it ran to. OK. So my possible options is that one of those hoses has come unclipped from the bottom of the tank, maybe dumping fuel onto the bike instead of running it to ground. I haven't seen any leaks on the ground or floor though. Maybe it's hitting a hot engine and evaporating as the bike cools down in the garage?

 

My bike started smelling of gas fumes after a ride. For a while what I did when parking it was open the gas cap briefly for a few seconds. It seemed to cure it.

 

Looks like you have the same bike. Did it ever stop smelling of gas, or do you do this currently/all the time? You have a non-CA version, I'm guessing?

 

I've noticed too my tank seems to be able to fit more fuel in it then it should.

I've noticed no abnormal fuel smells though

 

Just a thought I forgot about. Right behind Ur gearbox nessled in the frame may be a small catch tank that your vent hose and oil breather and whatnot may drain into that has a plug In it to keep it from harleying down the road. Look for that lil black box towards the bottom of the bike in front of the rear shock if it is there drain that beast. It should have a breather that goes up to the airbox to, that could be causing your hard start issue also. I remember this on my vf500r. Just a thought bud