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  #1  
Old 07-11-2006, 09:36 AM
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Default DL650 v-strom MPG drop?

I've noticed a couple things on my DL650 recently. 2 or 3 weeks ago, I got help adjusting the TBS. It did seem smoother, and more reponsive. Not night and day.. but a noticeble improvement.

This is an 05 DL650 I bought used with 2900 miles on it. In the last couple months, I've put a little over 4000 miles on it. At first, I was getting around 46MPG in town, and around 52 on the highway consistently.

But now, it seems like I'm only getting about 45MPG on the highway.. a 7MPG drop. I'm not certain, but it seems like it dropped after the TBS adjustment.

Also, a friend that rides with me sometimes said he thought it smelled like it was running rich.. or, had a "fuel-like" smell. I've noticed this too very infrequently. At first I thought it was just car exhaust.. but I've been noticing it occassionally when I'm all alone at an intersection.

Is this normal? Or, likely need new plugs? Or, take another look at the TBS adjustment? Or, because I'm now got alot more used to the bike... I'm now likely riding it more aggressively that I initially was?
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  #2  
Old 07-11-2006, 09:50 AM
kurt1305
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I'd replace the air filter and look at the plugs.
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Old 07-11-2006, 11:15 AM
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Quote:
Originally Posted by kurt1305
I'd replace the air filter and look at the plugs.
I just talked to Bob Whitney at Georgetown Honda... he seems to think that the smell is likely just the evaporative emissions canister I'm occassionally smelling and that it's pretty normal.

And suspects, that my drop in MPG is more than likely a change in riding style from when I first got the bike, i.e. while I was getting used to the bike I was taking my time through the gears.. but now, and probably just after the noticable "pep" from the TBS adjust.. I've been doing a bit more speed-shifting.

Or, he says the TBS could have been adjusted incorrectly. But likely not. He tells me you usually don't need to replace the plugs until around 15k, or around the same time as the first valve check. And around 12k on the air cleaner. He said just change the oil, and check one of the plugs.. if it's no darker than tan.. I'm fine.

thoughts?
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Old 07-11-2006, 11:23 AM
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It's possible that something is wrong, but I'd get some long-term data before you start tilting at windmills - a 10% variability in gas mileage isn't much and it typically attributable to riding conditions or variability in fillup conditions.

And as you say, most riders start honking on the bike more after they get used to it. During break-in and for the 1st 1K miles, I was getting 45-50 on my Wee, but now that I'm riding it like I stole it, I'm getting 40-45 and have occasionally been dipping down into the mid-30's chasing after friends on bigger bikes. I'm certain if I cruised around again, I'd be back near 50.

- Mark
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Old 07-11-2006, 11:45 AM
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Mine varies anywhere from 36 to 43 mpg on my 1000. It seems to me the biggest factor in mpg is the number of cold starts I have during a tank of fuel. The more cold starts, the more often the FI richens it up and thus a decrease in mileage. I'd still check the filter, you seem to do a lot of dusty conditions that would warrant an accelerated maitenance schedule on lubrication and filters.
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Old 07-11-2006, 11:50 AM
Vne Vne is offline
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Might want to check your tire pressure. It's amazing what a few PSI's will do to the MPG
__________________
2009 DL650 Orange, Very early start to 60K
2004 DL650 Blue (sold)
2004 GS500F (sold)
Vne = Velocity, Never Exceed. Itís an airplane thing (my other joy in life)
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Old 07-11-2006, 12:50 PM
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Quote:
Originally Posted by markjenn
It's possible that something is wrong, but I'd get some long-term data before you start tilting at windmills - a 10% variability in gas mileage isn't much and it typically attributable to riding conditions or variability in fillup conditions.

And as you say, most riders start honking on the bike more after they get used to it. During break-in and for the 1st 1K miles, I was getting 45-50 on my Wee, but now that I'm riding it like I stole it, I'm getting 40-45 and have occasionally been dipping down into the mid-30's chasing after friends on bigger bikes. I'm certain if I cruised around again, I'd be back near 50.

- Mark

The bike really seems to run so well, that I'm guessing it's the changed riding style. The only thing that had me concerned was the occassional fuel smell.. but since that evaporative cannister thing causes that and it's normal.. it's likely all good.
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Old 07-11-2006, 12:55 PM
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Quote:
Originally Posted by kurt1305
Mine varies anywhere from 36 to 43 mpg on my 1000. It seems to me the biggest factor in mpg is the number of cold starts I have during a tank of fuel. The more cold starts, the more often the FI richens it up and thus a decrease in mileage. I'd still check the filter, you seem to do a lot of dusty conditions that would warrant an accelerated maitenance schedule on lubrication and filters.

I didn't know the number of "cold starts" effects it too. I was basing the change on the majority of miles being highway or in town. So, even though I do mostly highway miles on a tank.. AND, stop and start more often.. it sounds like I won't enjoy that 52mpg that I was getting running all highway with almost no stops and riding nearly tank to tank?

Don't really ride in all that dusy conditions.. though I've done probably 40 miles of gravel since I've had the bike. And, have ridden in rain several times.. sometimes very heavy rain at that.

I'd just check the air filter.. but it seems like that's pretty involved.. and by the time you get to it.. you might as well replace it along with the plugs? Even if they're fine?
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Old 07-11-2006, 12:55 PM
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Quote:
Originally Posted by Vne
Might want to check your tire pressure. It's amazing what a few PSI's will do to the MPG
I don't check the pressure as often as I should.. but I just checked last night and was getting 32psi in the front, and 36psi in the rear.

Just rechecked cold and have 31/34... guess that's where some of my mpg's went?

One of the sites says the tires should be at 37/40... but the sticker on the side of the bike says 33/41. Go with the sticker?
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  #10  
Old 07-11-2006, 11:37 PM
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I run 38 and 41. My average mpg is 58.8.
It's no good for off road and a little wobbly in deep gravel, but hangs on to the blacktop quite well.
Best,
Jim
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