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Hi all, I have a 2001 cbr 929 rr .Feels like its running pretty good.After I drive it and park in garage it smells like gas? I have checked under gas tank
and looked around and find no sign of leaks and can not locate smell .Anybody have any ideas?
Thanks,
IP27
 

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Probably need to lift the fuel tank, inspect fuel hoses, and test the fpr.
Careful lowering the tank, easy to pinch wires, check that fuel vent hose is properly routed and venting.
 

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Not sure how the tank vents on a 929, but I had a fuel cap that wasn't venting and as the bottom of the tank heated up from engine heat when I parked it after a ride it would force fuel out the overflow tube and leave a little puddle on the ground. If the cap is vented, make sure it is venting properly. I took mine apart and cleaned it.
 

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You California guys, you all stick together! Everyone has to give pics, and an intro but the Cali guy? Wow. :rotfl:

If the vent was blocked FJ, he would have produced a vacuum in the tank and it would starve for fuel, not build up pressure unless he was storing it in warmer weather. He said he was riding it, so the vent isn't the issue. More like he has a leak, just hasn't looked hard enough from 5' away from the bike. :D Some old hose or connector could be weeping, that's all it takes to get fumes in a closed garage.
 

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Hi all, I have a 2001 cbr 929 rr .Feels like its running pretty good.After I drive it and park in garage it smells like gas? I have checked under gas tank
and looked around and find no sign of leaks and can not locate smell .Anybody have any ideas?
Thanks,
IP27
You California guys, you all stick together! Everyone has to give pics, and an intro but the Cali guy? Wow. :rotfl:

If the vent was blocked FJ, he would have produced a vacuum in the tank and it would starve for fuel, not build up pressure unless he was storing it in warmer weather. He said he was riding it, so the vent isn't the issue. More like he has a leak, just hasn't looked hard enough from 5' away from the bike. :D Some old hose or connector could be weeping, that's all it takes to get fumes in a closed garage.
After he rides it and parks it in the garage is what he said. This is exactly what I had a bike do. After parking it, particularly in warmer weather, the engine heat would cause the pressure in the tank to rise, forcing fuel out the overflow line. It would leave about 1/2 a pint on the garage floor. He asked for ideas, I gave him one. As far as California guys sticking together, I agree with who I agree with, regardless of their location, sometimes even you. Badgering people for not giving an introduction is not my style, I see no value in it. I'm not sure I gave an introduction 5 years ago myself, and I don't recall anyone badgering me, so who am I to pass judgement?
 

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You California guys, you all stick together! Everyone has to give pics, and an intro but the Cali guy? Wow. :rotfl:

If the vent was blocked FJ, he would have produced a vacuum in the tank and it would starve for fuel.
Not true. I guess you never heard of the RC51 and the imploding tank. Some owners ran into a venting issue and the fuel pump caused such a vacuum that the tank would start to show dents in it from the difference of atmospheric pressure.

You would be surprised at how powerful the fuel pump is; they really suck.
 

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After he rides it and parks it in the garage is what he said. This is exactly what I had a bike do. After parking it, particularly in warmer weather, the engine heat would cause the pressure in the tank to rise, forcing fuel out the overflow line. It would leave about 1/2 a pint on the garage floor. He asked for ideas, I gave him one. As far as California guys sticking together, I agree with who I agree with, regardless of their location, sometimes even you. Badgering people for not giving an introduction is not my style, I see no value in it. I'm not sure I gave an introduction 5 years ago myself, and I don't recall anyone badgering me, so who am I to pass judgement?
Like you, I call it like I see it, and people badger here. But in this case it was a joke about you California guys, if you were from anywhere else, you would have got it. Lighten up.

I never saw the spills from vent here, because I know where the vent pick up is. I don't fill up to the cap either. The vent is usually found above the splash ring under the cap. How does gas jump up there unless you're overfilling the tank while your bike is on the side stand? :confused:
 

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Not true. I guess you never heard of the RC51 and the imploding tank. Some owners ran into a venting issue and the fuel pump caused such a vacuum that the tank would start to show dents in it from the difference of atmospheric pressure.

You would be surprised at how powerful the fuel pump is; they really suck.
You're right, never knew it was a specific problem or flaw to any particular bike model. Usually a blocked vent will whistle at you, or when you open the cap you can hear release of pressure and investigate the problem before it worsens. But again, the vent should be well above the fuel line before gas actually vents to the floor. People do fill on the side stand just for this reason. A blocked vent, full tank of gas, how you create enough vacuum I guess to do that.
 

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Like you, I call it like I see it, and people badger here. But in this case it was a joke about you California guys, if you were from anywhere else, you would have got it. Lighten up.

I never saw the spills from vent here, because I know where the vent pick up is. I don't fill up to the cap either. The vent is usually found above the splash ring under the cap. How does gas jump up there unless you're overfilling the tank while your bike is on the side stand? :confused:
No worries, I got your joke. I'm sure you've left a sealed gas can in the sun, it heated up, pressurized and was forced out the vent.
In my case the vent was plugged and as the bike was parked with a hot engine the fuel expanded enough to be forced out the overfill hose onto the ground underneath the bike every time I parked it anywhere close to full. The bike ran fine, no fuel starvation issues at all so enough air must have been allowed in.
 

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Intake leak is somewhat sensitive to stalling = Idles fine or the OP would complain about stalling. Cali uses a vapor canister and loops that vapor/overflow to a cylinder via a hose(s) off the throttle body. Possible overfilled the tank one too many times, excess ran down the canister and is still purging?... scenario 1. Scenario 2 is a broken tube inside the tank that may be submerged in the tank?

 

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Discussion Starter #12
I see you're from California. Welcome to the forum. How long have you been riding?
Hi, thank you for the welcome!I am from San Jose Ca.I have been on 2 wheels since I was a kid.
i got my lic at about age 17, i enjoy being on 2 wheels!
So how about you,how long you been riding. Its very nice to meet you
sorry for the slow reponse!
 

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Hi Ip man. I'm rather new to riding, 2011, legally anyway. I live every night on Craigslist chasing bikes since working around one kind of bike then another, and none actually fit or ride like I want them too. Then of course, in my 50s, just when I got it figured out, my body starts to ache and I had to downgrade to an upright riding position. Good forum, people know a lot here, and are helpful by majority.
 

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Discussion Starter #14
Hi all, I have a 2001 cbr 929 rr .Feels like its running pretty good.After I drive it and park in garage it smells like gas? I have checked under gas tank
and looked around and find no sign of leaks and can not locate smell .Anybody have any ideas?
Thanks,
IP27

Hi Guys, thanks for the tips! over the the weekend. I did pull up the tank and looked and smelled for leaks and checked out all hoses also did that with the motor on! and did not find anything in that area...one thing I did not check , which someone mentioned was air cleaner being very dirty! I will check it out again. another thing I did look at, was the rear exhaust. There is a oxygen sensor. I pulled the off and started the bike. I did find that smelly gas smell stronger!...So what you all think..could it be a oxygen sensor??
or if anyone know exactly what that sensor does??
thanks !
 

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Discussion Starter #15
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Hey 1926, what took you so long to get into bikes!! haha! JK! well that sucks that you are having a hard time finding a bike! what are you riding? good luck on finding a bike that you like and fits you!
 

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someone mentioned was air cleaner being very dirty!
Good point. But you are more fueled by the 02 and that would catch the rich set. You'd find a low speed hesitation. You are not mentioning this as a driveability problem. I'd still inspect if you have no history to the bike.

..could it be a oxygen sensor??
or if anyone know exactly what that sensor does??
The 02 has to code on the dash. There are thresholds being met. This too is a DTT machine and if failed as in; short to ground/signal out of range/not connected/wire out of connector... we are not seeing those met. Therefore, you are about to throw parts at it you do not see a code being set by the 02.

However, you could disconnect the 02 connector, zip-tie the 02 harness so it does not drop onto the pipe and burn it. Take the bike for a ride and whip it up in the rpm area... clean it out wink-wink.

The ECU uses a default/backup/fail-safe/check engine light/limp my bike for safe riding conditions. It falls on its face, that's the safe limp you're done. If it keeps revving wink-wink.

Then on the run back, reconnect the 02, the light goes off, no codes = Not the 02 you'd assume.
 

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Pretty sure that whole evap system can be removed and the two black wires at the O2 sensor can be bridged with a resistor. That keeps the ECU happy and not showing a code.
btw, when you get this wrapped up, remember to go into the ECU and erase the previously stored codes.
 

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removed and the two black wires at the O2 sensor can be bridged with a resistor. That keeps the ECU happy and not showing a code.
Ding-ding-ding, wrong answer. How many wires off the 02? Each had an analog input. Now it's set at digital or zero input = 0000 in processing speak. You may have turned the light off, but to tie the other wire to it...ding-ding-ding, analog turns Limp wink-(digital)-wink.

We lose our 02 sensor, ECU turns to a backup using 760mmHg {atmospheric pressure)... which filled in 0000 = wire out/connector off/direct short/(ohm resistor) = signal out of range. Ding-Ding-Ding!! We have a winner!

go into the ECU and erase the previously stored codes.
That would be a bet I'd like to wager. Your end says to erase and my end says it is flipped to a lock until repair is wink-wink, back to stock. Sounds like the kind of catch22 I'm looking put you square and center for detuning purposes only.

:eek: Are we on the same page yet?


:D Clear that RAM
Turn off the key.
Turn on the key.
Wait....
Wait....
:D Clear that RAM
Turn off key.
Turn it back on.
Ping it...
Sing it...

Signed,
NOLTT
 

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Ding-ding-ding, wrong answer. How many wires off the 02? Each had an analog input. Now it's set at digital or zero input = 0000 in processing speak. You may have turned the light off, but to tie the other wire to it...ding-ding-ding, analog turns Limp wink-(digital)-wink.

We lose our 02 sensor, ECU turns to a backup using 760mmHg {atmospheric pressure)... which filled in 0000 = wire out/connector off/direct short/(ohm resistor) = signal out of range. Ding-Ding-Ding!! We have a winner!


That would be a bet I'd like to wager. Your end says to erase and my end says it is flipped to a lock until repair is wink-wink, back to stock. Sounds like the kind of catch22 I'm looking put you square and center for detuning purposes only.

:eek: Are we on the same page yet?


:D Clear that RAM
Turn off the key.
Turn on the key.
Wait....
Wait....
:D Clear that RAM
Turn off key.
Turn it back on.
Ping it...
Sing it...

Signed,
NOLTT
You go boy! :plus1:
 

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Ding-ding-ding, wrong answer. How many wires off the 02? Each had an analog input. Now it's set at digital or zero input = 0000 in processing speak. You may have turned the light off, but to tie the other wire to it...ding-ding-ding, analog turns Limp wink-(digital)-wink.

We lose our 02 sensor, ECU turns to a backup using 760mmHg {atmospheric pressure)... which filled in 0000 = wire out/connector off/direct short/(ohm resistor) = signal out of range. Ding-Ding-Ding!! We have a winner!


That would be a bet I'd like to wager. Your end says to erase and my end says it is flipped to a lock until repair is wink-wink, back to stock. Sounds like the kind of catch22 I'm looking put you square and center for detuning purposes only.


:eek: Are we on the same page yet?


:D Clear that RAM
Turn off the key.
Turn on the key.
Wait....
Wait....
:D Clear that RAM
Turn off key.
Turn it back on.
Ping it...
Sing it...

Signed,
NOLTT
Ok, ok, looks like i just got a schooling. :smilebig:

I was under the impression the O2 sensor had four wires, two of which were black. Several years ago when I installed a PC in my vfr, a Honda tech advised me to bridge the black wires with a resistor (99cents from Radio Shack) was the way to defeat the o2 sensor so the PC would work right. I think my buddy did the same thing with his 954.
I wish I could remember the details a little better, but I installed the resistor, no FI light, no problems at all, and PC made the bike run better for sure. That was the logic I was following.

As far as clearing previously stored codes, (aka self-diagnostic memory reset procedure), I don't understand your argument against that. Don't you do that after you've corrected a fault and the bike is back to normal? I do.
 
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