[Improperly Torqued]

From your description, it seems likely that you got something gunky enough to partially occlude the fuel filter. You might be able to clear it if you remove it to have a look. I can't say how difficult this might be, as I've never had mine out.

 

[mrjonesiu]

Ok, I drained the tank yesterday and let it dry out in the open. I then put premium fuel back into it, and the problem seems worse! There was water in the gas, but now there should be none.

Just glancing at the pump, it didnt look like the easiest to take apart. I guess ill look at some diagrams now while I got internet.

Anything else I should look at? Injector problems?

 

[Improperly Torqued]

You've probably already thought of this, but bad behavior under hard acceleration can also indicate poor airflow. You might check the air filter while you have the tank off. Of course, I wouldn't expect that behavior to be affected by the amount of fuel in the tank.

 

[Austin44]

I dont have access to HEET down here, nor a Vstrom manual. :headbang:

Fuel flow test & fuel filter mods:
External Fuel Filter modification

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Suzuki V-Strom DL1000 / DL650 Info and Accessories