2003 800 - poor fuel economy

[markf]

I've been getting 3-4 mpg this season and last. Prior, it was always getting at least 6-8 mpg. Changed the plugs, but that didn't help. I haven't modified/fixed the carb, but doesn't mean that it could now have a problem. Any ideas on what to check?

 

[turbolq4]

thats what i get with my Cat 800, my doo usually got 6-8, it makes it hard to enjoy riding when you are fixated on the gas gauge.

the only thing i can think of is maybe some of the bushings in the carbs are worn out, you cant lean it out or restrict fuel flow so something has got to be out of spec. As long as its got good compression and the clutches are tuned it should get better than that.

 

[JustinB]

Its been the answer lately but reeds! If you haven't replaced them yet it most likely time. I do allot better just after changing to the stockers.

 

[deboer]

i have a 2002 800 and only get like 5 i think so i wouldn't worry about it to much and are you sure you haven't started to ride harder this year as in more full throttle in and out of it

 

[doniam]

check mpem

check all conections and hoses to your mpem and rail.
when it has a problem it goes to full rich.

 

[stumpy2000]

this may sound dirty... BUT -have ya stuck your head up your tunnel lately? i was getting some crappy mileage the last trip or so out so after fiddling with carbs n reeds n things... i took a look & found that one of the upper rear wheels wuz chewing itself to death on the torsion spring cause of a pooched bearing/retainer... might wanna check in case you're dragging around an old xlt or something back there....

 

[linden]

I've been getting 3-4 mpg this season and last. Prior, it was always getting at least 6-8 mpg. Changed the plugs, but that didn't help. I haven't modified/fixed the carb, but doesn't mean that it could now have a problem. Any ideas on what to check?

Hey mark, how many kms on your engine?? My 03 really burns through the fuel and oil... it is boared out a little but pulls hard, haha just throw in a new short block and it'll be fine

 

[Thistledoo]

had a 03 zx that did the same thing....choke cable was melted and stuck on just a touch...burnt gas like a mother check that for sure