Quad bike is using fule like mad ??? and has no Power ?

Zcool

New member
My yamaha 200cc Blaster was standing for 3 years and the gas got old so I had it serviced ( carb Clean ,new spark plug , new air filter , shortend and adjusted chain ,lubed levers + pivots etc ,and cleaned )

But when i went riding this weekend it didn't have any power ,it started fine but wouldn't pick up speed if i gear down it just makes a big Noise and if i gear up the speed stayed the same it just wouldn't go faster ( couldn't get higher then 3rd gear )
It feel as if it is getting to much gas or if the choke is out ( no it wasn't out )
then I asked a worker there and he made a few adjustments with the air intake screw and took out the sparkplug put a other one in and nothing helped
then all of a sudden it starts working perfectly again ? don't know whats wrong Please help ?

And it used 10 liter gas tank in 35 min ( no tank is not leaking but i saw some gas coming out of a small pipe ( think its the overflow pipe ) )
 
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