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post #1 of 75 (permalink) Old 09-15-2007, 07:55 PM Thread Starter
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chitty gas mileage

Why am i getting such piss poor gas mileage.... My low light came on on my 01 Gixxer 750 with only 98 miles to the tank... This tank Had some highway miles on it and maybe under half was stop and go traffic... My riding habits haven't changed over night and i have noticed my mileage is going down the toilet... what gives... the bike has 6k miles on it and it only has a Yoshi RS-3 slip on for mods... do you think because of the slip on its not burning the right fuel air ratio and it could cause the bike to pig down the gas... What is the deal if this thing is going to get this bad of gas mileage i would be better off driving my gas guzzling V8 to work and back.

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post #2 of 75 (permalink) Old 09-15-2007, 08:03 PM Thread Starter
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what could cause such a drastic change in fuel consumption I used to go from 120-135ish miles before the light came on now its coming on before 100... what gives.

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post #3 of 75 (permalink) Old 09-15-2007, 08:03 PM
 
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i dont understand why it would be doing that. i get about 150mptank and havent really dropped below that. the pipe will not make that much differance even if you were constantly wrenching on the throttle. check the ignition timeing. if its igniting prematurely it may be sucking more gas than it needs but not burning all that its sucking in. now dont quote me on that but my former job was a mechanic and thats what i found in most cases like that. but then again ive mostly worked on V-8s. also you may want to check your computer. if its reading too rich then youve got a problem. these are just my theories though.
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post #4 of 75 (permalink) Old 09-15-2007, 08:05 PM
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check your air filter.
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post #5 of 75 (permalink) Old 09-15-2007, 08:05 PM
 
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also check your tire pressure and brake resistance that too can have a huge impact. as well as your bolts to tighten the pipe on. compression can also hurt
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post #6 of 75 (permalink) Old 09-15-2007, 08:20 PM
 
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best way to check if your bike is running rich is take a deep breath... dont think filter would cause bad milage, restricting air flow would only mean less power. Idk if the 01 is carbed or FI but either way the first think i'd look at is the slip on, especially if you installed it yourself. 90% of problems are user error.
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post #7 of 75 (permalink) Old 09-15-2007, 08:22 PM
 
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Originally Posted by red_baron07 View Post
also check your tire pressure and brake resistance that too can have a huge impact. as well as your bolts to tighten the pipe on. compression can also hurt
gotta say, tire pressure and brake resistance will not cause this bad of millage loss, but coupled with a loose pipe and bike running rich w/ a low octane... all things to consider.
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post #8 of 75 (permalink) Old 09-15-2007, 08:24 PM
 
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gotta say, tire pressure and brake resistance will not cause this bad of millage loss, but coupled with a loose pipe and bike running rich w/ a low octane... all things to consider.
its true they wont cause that bad of milage but added together with all of those things can cause a significant drop. as far as the tires youd notice in your riding more than anything.... but as the case stands check your pipe like none too soft said.
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post #9 of 75 (permalink) Old 09-15-2007, 08:26 PM
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Quote:
Originally Posted by NONE_too_SOFT View Post
best way to check if your bike is running rich is take a deep breath... dont think filter would cause bad milage, restricting air flow would only mean less power. Idk if the 01 is carbed or FI but either way the first think i'd look at is the slip on, especially if you installed it yourself. 90% of problems are user error.
I agree it could be the pipe esp if the problem has started since its install. But a clogged filter will cause bad mileage. Think about it, most bike nowa days has ram air. Which means alot more dirt, bugs, wtc gets rammed into the filter. filter gets clogged, carbs/FI runs rich, bike has bad mileage.

I cleaned mine not to long ago n I got 20+ more miles per tank. Not to mention it ran better too
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post #10 of 75 (permalink) Old 09-15-2007, 08:29 PM
 
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heres a good solution... tomarrow is sunday, i think we should all run and do a tune up lol itll be fun! lol jk thats actually a really fruity idea
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post #11 of 75 (permalink) Old 09-15-2007, 08:36 PM
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heres a good solution... tomarrow is sunday, i think we should all run and do a tune up lol itll be fun! lol jk thats actually a really fruity idea
Actually I just might clean n recharge my K&N tomorrow, install a fresh set of plugs, and hit the mountains
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post #12 of 75 (permalink) Old 09-15-2007, 08:38 PM
 
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lol stupid florida and its no fun twisties
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post #13 of 75 (permalink) Old 09-15-2007, 08:40 PM Thread Starter
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The bike has 6,000 miles on it.... how long does your typical filter last... and the bike has always had this slip-on on it.... I have not done anything to it but ride it... It does smell like it runs a little rich but it has always smelt like that... I do not understand the instant drop in fuel economy.

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post #14 of 75 (permalink) Old 09-15-2007, 08:42 PM
 
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your filter just depends on where you ride and what kind of weather your ride in. if you live near or on a dirt road then the chances of it getting filled are greater...
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post #15 of 75 (permalink) Old 09-15-2007, 08:44 PM Thread Starter
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When i move the bike around by pushing it... it seems to roll freely so i dont think the brake callipers or anything are hanging up.

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post #16 of 75 (permalink) Old 09-15-2007, 08:44 PM
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Quote:
Originally Posted by impala balko View Post
The bike has 6,000 miles on it.... how long does your typical filter last... and the bike has always had this slip-on on it.... I have not done anything to it but ride it... It does smell like it runs a little rich but it has always smelt like that... I do not understand the instant drop in fuel economy.
maybe the gas ya got. But the interval on the filter I dunno for sure but I would say it would depend really. I can tell you I seen a diff in mine after cleaning mine.
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post #17 of 75 (permalink) Old 09-15-2007, 08:53 PM Thread Starter
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maybe the gas ya got. But the interval on the filter I dunno for sure but I would say it would depend really. I can tell you I seen a diff in mine after cleaning mine.
Well I do want to get a K&N filter for it maybe Ill just do that.... How often should you change the plugs on these things... like i said this bike only has 6k miles on it should it even need them done.

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post #18 of 75 (permalink) Old 09-15-2007, 08:57 PM
 
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if it smells like its running rich, you've got either a clogged and dirty air filter, or you need to get the fuel map retuned, being that the gixxer was FI from about 99+ I think.

filthy air filters have a very big effect on fuel economy, regardless of the motor. fuel filters are similar too, except they restrict performance more than fuel economy. low tire pressures can also play a part, and should be checked anyways.
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post #19 of 75 (permalink) Old 09-15-2007, 08:59 PM
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Quote:
Originally Posted by impala balko View Post
Well I do want to get a K&N filter for it maybe Ill just do that.... How often should you change the plugs on these things... like i said this bike only has 6k miles on it should it even need them done.
not sure check you manual for when both should be changed. With juts 6 k ya wouldnt think the filter would be clogged, but if ya had alot of bugs n debris while riding those 6k it could be. Hopefully its something simple tho.

And I'm sure GM will check in soon too
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post #20 of 75 (permalink) Old 09-15-2007, 09:04 PM Thread Starter
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The bike is FI.... where is the fuel filter on these things.... and by changing the air filter you think it should make the thing lean out a little bit.. I do not have an owners manual so maybe ill pick that up with the filter at the bike shop this week.


Last edited by impala balko; 09-15-2007 at 09:09 PM.
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