Gas mileage without tuner

That would be very unlikely as it would have been a pointless swap. Is the bike topless? Why did you remove the pc?

ScreaminAndy said:

That would be very unlikely as it would have been a pointless swap. Is the bike topless? Why did you remove the pc?

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The drilled out exhaust was much too loud and I wanted the stock sound so I removed the PC because I replaced the drilled exhaust.

Thinking about it, could I have left the PC in it and used a map for stock setup?

Trying to figure out why it's idling so high and getting bad mileage. I can practically watch the gas needle move when I accelerate.

What do you mean by topless?

Thanks.

shootcraps said:

The drilled out exhaust was much too loud and I wanted the stock sound so I removed the PC because I replaced the drilled exhaust.

Thinking about it, could I have left the PC in it and used a map for stock setup?

Trying to figure out why it's idling so high and getting bad mileage. I can practically watch the gas needle move when I accelerate.

What do you mean by topless?

Thanks.

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Actually at 1100 the idle is a bit low. Should be in the 1240 range. The increase in back pressure in the exhaust change will make it run richer then the drilled out exhaust. Topless is when you remove the lid off of the breather box and leave it off, exposing the filter more.
Ron

What Ron says is right. When I went to buy my R model it would stumble and fall on it's face above 6000 Rpm. I told the seller that we had to get it to run smoother or no sale. I felt it was running lean. He said he never revved it that high and that he had removed some loud slip-ons and re-installed the "stock" hollow points for the sale. After checking settings on the Arlen Ness Dobeck controller we found out it was way rich for the open pipes, not lean. After resetting the controller to a much leaner setting it ran much better, not correct but I got a nice discount on the bike and later dialed it in. If I were you I would put the PC back on carefully and adjust it as needed. I don't think you can just remove a controller like that and ride off OK because I'm not sure it will "revert" to the stock map. Others here know more than me on that.

What kind of gas mileage are you talking about?

RustyG said:

What kind of gas mileage are you talking about?

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I haven't measured it exactly. After riding about 15 miles it can be down a quarter of a tank.

shootcraps said:

I haven't measured it exactly. After riding about 15 miles it can be down a quarter of a tank.

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You can't use the fuel gauge like that. They 're notoriously inaccurate. You could ride till it shows nearly empty and maybe still have half a tank of fuel. Do a search on here, you will find mountains of info. Most rely on the trip meter between refills.

shootcraps said:

I took a look under the hood and found the horn was cut off of the air box top, probably to make room for the PC. It has a K&N filter. Mild smell of gas. The O-rings were at the top of the velocity stacks. And there is electrical tape holding that other part to the air filter lid screw. I'm really just trying to get it back to a stock configuration. Thanks.

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He forgot to put the orings back down. Common mistake. The tape is to snug up the canister cap. They are loose by nature and make a rattle sound at idle. On mine, I removed the cap, cleaned it all up and used O2 sensor safe ultra copper to bond the lid. It can still be removed if needed but it takes up the space to prevent that idle clunking.
The filter smells like gas because the engtine oil is likely diluted with gas and the engine vents these fumes into the breather box. Smell your dipstick. Running with diluted oil is as bad as running lean. Even worse depending on how much. Might want to get that tune dialed in to take out that over rich condition.
Ron

rbabos said:

He forgot to put the orings back down. Common mistake. The tape is to snug up the canister cap. They are loose by nature and make a rattle sound at idle. On mine, I removed the cap, cleaned it all up and used O2 sensor safe ultra copper to bond the lid. It can still be removed if needed but it takes up the space to prevent that idle clunking.
The filter smells like gas because the engtine oil is likely diluted with gas and the engine vents these fumes into the breather box. Smell your dipstick. Running with diluted oil is as bad as running lean. Even worse depending on how much. Might want to get that tune dialed in to take out that over rich condition.
Ron

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Well that's good news. I thought something had broken and was just taped up. I will check the oil. Thanks.

On my stock setup on my 04, my idle runs about 11-1200 and on average I get about 30mpg when I take it easy. You can't trust gas
Gauges on a VROD. You gotta fill
Up and set the tripometer.Look for a gas station at about 100 miles, although you can probably make it 120-130 miles taking it easy before you get in trouble.

MikeSez said:

On my stock setup on my 04, my idle runs about 11-1200 and on average I get about 30mpg when I take it easy. You can't trust gas
Gauges on a VROD. You gotta fill
Up and set the tripometer.Look for a gas station at about 100 miles, although you can probably make it 120-130 miles taking it easy before you get in trouble.

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Thanks. Just found out that the trip meter button doesn't work. Need to look into that as well.

To Revert or not Revert, that is the question -

"If I were you I would put the PC back on carefully and adjust it as needed. I don't think you can just remove a controller like that and ride off OK because I'm not sure it will "revert" to the stock map. Others here know more than me on that."

SOooo - does anyone know what happens when you just remove a fuel controller like shootcraps did ? Will the stock EFI computer eventually " revert " to original settings or stay stuck in the rich mode for the prior installed open pipes ? His is an '02 so no O2 sensors /feedback loop to report back the rich condition to the computer but will it revert to the original OEM fuel map/operation over say 150 miles ? I would think you might have a chance on a newer O2 sensor equipped bike but what about the older non O2 bikes ? Guru's ? Stever 975 ? :blahblah:

Unplugging the O2 sensors will make the ECM go into open loop and run as rich as the ve tables in the calibration will allow. Mileage will go to shit.
Ron

I was checking out the V&H fuel pak for my 04 B. It does revert back to the stock settings when you remove the fuel pak. I don't know about all others but if it runs like crap when removed, I'd plug it back in. Probably a call to the manufacturer customer service line would be helpful. I'd rather have it on anyway, even on a stock set up.

rbabos said:

He forgot to put the orings back down. Common mistake. The tape is to snug up the canister cap. They are loose by nature and make a rattle sound at idle. On mine, I removed the cap, cleaned it all up and used O2 sensor safe ultra copper to bond the lid. It can still be removed if needed but it takes up the space to prevent that idle clunking.
The filter smells like gas because the engine oil is likely diluted with gas and the engine vents these fumes into the breather box. Smell your dipstick. Running with diluted oil is as bad as running lean. Even worse depending on how much. Might want to get that tune dialed in to take out that over rich condition.
Ron

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I used a zip tie to secure the canister cap. Much cleaner than electrical tape.

I checked the oil and PHEW! Strong smell of gasoline. Doing an oil change today. Thanks - you really nailed that one. Gonna get the K&N filter cleaner too.

shootcraps said:

Oil change is done and took it for a ride. Seems to run and shift a little smoother.

Last night I thought if she's been running rich with that PC in there, then the plugs are probably fouled. Took them out and sure enough, they don't look so good. Will get a new set today and see how she does.

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Yes, rich for sure. This will cause ill running in certain rpms.
Ron

Fresh oil and filter, new spark plugs, new air filter. She is purring like a tiger now. Rode her around the neighborhood and she feels great. :moped: Thanks for all the advice!