Poor fuel mileage (Full Version)

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Poor fuel mileage

Clorox09 -> Poor fuel mileage (5/21/2008 3:51:34 PM)
I have a 91cbr with 33,000 miles on it. My bike is only getting about 39 miles per gallon highway at the momment. I also dont have consistant power. it is due for a valve adjustment but wasnt sure if anything elsei should look at ... coils are good tested... didnt know if there was any chance timing chain maybe?

ggrahn -> RE: Poor fuel mileage (5/22/2008 9:21:55 AM)
Sync the carbs. I build a carb sync tool for around $40. I have yet to test it. I am rejetting the carbs. I get about 35 miles a gallon right now. Carbs are mostly synced but i have no fairings and it seems to run rich. I do now know the quality or if the jets currently installed are correct, hence the replacement. Its only $40 for the jets (which I have) and a couple hours work. We'll see what happens when I am finished.

Clorox09 -> RE: Poor fuel mileage (5/22/2008 7:09:38 PM)
i've done it already i have the carbtune 2 so it was good

redzintimidator -> RE: Poor fuel mileage (5/23/2008 5:20:21 AM)
39 doesnt seem too bad...Try running some seafoam in the gas tank to clean the carbs and carbon deposits from the valves and piston heads.

elmer -> RE: Poor fuel mileage (5/23/2008 7:40:21 PM)
Thats pretty close to expected fuel mileage. I'd go ahead and just pull the carbs and clean each jet individually. Search the HowTo forum for a carb cleaning howto for some help. If you plan on adjusting the valves I'd go ahead with that, it won't hurt anything if done right. Good Luck!

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