bike lugging when a load is put on it?
 

i have a 2003 gsxr 600. changed the fuel filter. changed the plugs. cleaned the tank. ran fuel cleaner for the dealer. but the problem is when i driving its alright but when i try to crank the throttle back it spits and sputters. but when i let up then it goes a little better.the only thing i havent tried is taking apart the fuel injects apart. any help?

Might be worth it to check your MAF/associated sensors. My truck (speed density) did something similar with a bad MAP sensor.

Edit: Didn't see the date on this post on the 3rd page. Holy crap this forum is lowwww traffic.

If you have a Suzuki gsxr 600 k3 then it is very good for yuo because it is one of the most popular model of Suzuki bike.If you have a battery problem and if it is in a warranty period then you should replace it.
testking 70-640