Why does my 04 Yamaha Vstar not get great gas mileage?

R

reb422

New member
I recently bought a 2004 Yamaha Vstar 100. I am the second owner. My buddy has the same bike but his is an '01. He has to switch over to his reserve fuel at about 150 miles after fill up. In two tanks so far I have had to switch over to reserve at 90-95 miles. I called the previous owner of my bike and asked him when he switched to reserve and he too said he had to switch to reserve at about 150 miles. The bike runs fine and I dont believe I'm doing anything different than anybody else would to drive it. I'm not just revving the heck out of it at stop lights or anything. What could possibly make the difference that I'm losing 60 miles per tank? And for the record the previous owner changed the oil, filter, plugs, and cleaned the air filter just before I bought it. The exhaust is stock too. Any suggestions would be great. Thanks.
 
What kind of gas did you use?? unleaded or super unleaded??
and If you drive alot in city. that use more gas than Highway. and If you ride in alot of cool days. That use more gas than over 70's degrees. warmer weather give better gas mileage. and Highways give better gas mileage than city.
I own a 1985 yamaha FJ600. Cold weather give me bad gas mileage. When the weather is warm like over 75 degrees. It make big different than cold weather. I get about one hundered miles more per tank on summer days than cold days.
 
go to an auto parts store and buy a bottle of gumout (make sure it's the one for the carb not fuel injection) and put it in your empty gas tank and then fill up with the highest octane you can find. I recently bought a 96 yamaha royal star 1300 that had been sitting in a garage since 97 (it only had 1800 miles on it) The seals were still good and instead of pulling the carbs to clean them I just ran gumout and 100 octane gas through the engine and the bike gets about 190 miles to the tank (4.8 gallons). Usually low fuel economy is a fuel system problem (dirty fuel filter, dirty carbs, low quality fuel etc) and the gumout +the high octane gas will burn out any gunk or carbon deposits in the fuel system.
 
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