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Old 02-02-2009, 10:34 AM   #1 (permalink)
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Good Morning Everybody



I was reading some of the posts this morning and saw where many of you with GL1500's are getting around 40 miles to the gallon.



I have a 1998 GL1500SE with a little under 19,000 miles. It was just triked out at 18,240 miles. I've checked the mileage 3 times and so far it's around 28 miles per gallon. Needless to say I'm a bit disappointed in the mileage. I know it being a trike will bring the mileage down a bit but not that much.



I DO think it's running rich. I can smell gas when it's just sitting idling once it's warmed up. It idles at 800 RPMs with no hesitation or surge. It does not miss....it cranks right up....I was riding with just me and no load....speed between 70 - 75 on freeway and mostly with cruise set...no cutting out at speeds and has plenty of power with no hesitation.



Any suggestions what to look for or should I just get used to the poor mileage..the gas smell does worry me a bit.



Thanks for any help you can give me.



David
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Old 02-02-2009, 10:37 AM   #2 (permalink)
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Welcome to the forum David.
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Old 02-02-2009, 11:13 AM   #3 (permalink)
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hi david and welcome to the forum if the bike is running rich you will have to remove the carbs to fix this as the float hight sets the mixture but first sync the carbs they may be off a little open the fuel door and have a sniff for a gas leak the pet **** has ben knowen to leak, make sure none of the brakes are draging, and cheque the plugs to see what condation they are in, has the air filter been changed if not this will upset the mixture also
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Old 02-02-2009, 11:22 AM   #4 (permalink)
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David you will be using more gas having a trike conversion. By checking your filters and keeping you tires and plugs good you should get into the 30s per gallon.
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Old 02-02-2009, 11:31 AM   #5 (permalink)
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is there no one local with a wing, the pair of you could run at a steady speed together and compare the rpm's, i'm thinking off gear ratio's at the diff and what wheel/tyre size you have, or brakes dragging slightly
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Old 02-02-2009, 11:51 AM   #6 (permalink)
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probably asking the trike shop if the mpg drop is normal or out of the range expected, after installing many trikes they should have the experience to tell you
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Old 02-02-2009, 04:05 PM   #7 (permalink)
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If you are running between 70 and 75 then that is a big part of it. Anything over 3000 RPM and the 1500 start sucking it down and I imagine it is even worse with a trike.
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Old 02-02-2009, 04:17 PM   #8 (permalink)
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Thanks for your response. It's hard to keep your speed under 70 around the Houston area...they WILL run over you.

I'll try next weekend keeping it under 70 and see if that helps. I need to check the plugs and see if it really is running rich. Since I just bought the trike about 2 months ago I'm not sure if they ever changed the air filter or not. I know I changed the oil and filter 2 weeks ago and it was dirty.

I may just have a mechanic check it out and see if he can check the carbs out if I can't figure anything else out.

Thanks again for your help.

David
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Old 02-02-2009, 04:22 PM   #9 (permalink)
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agnogel wrote:
Quote:
hi david and welcome to the forum if the bike is running rich you will have to remove the carbs to fix this as the float hight sets the mixture but first sync the carbs they may be off a little open the fuel door and have a sniff for a gas leak the pet **** has ben knowen to leak, make sure none of the brakes are draging, and cheque the plugs to see what condation they are in, has the air filter been changed if not this will upset the mixture also
David,

The above is all solid stuff; those plugs should tell you alot. I've just seen an article in the "Tech Q & A" of RIDER magazine March'09 issue titled Guzzling Valkyrie; same engine right? The jest of the response was directed toplug appearance, weak spark and possible ECM/spark advance issues.

BUT you shouldeliminate the possibility of fuel loss from petcock and tank integrity issues first.



Steve
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Old 02-02-2009, 04:39 PM   #10 (permalink)
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Going under 70mph in Houston, Texas is asking to get run over





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