I think I need the opposite of that, to make it less responsive.

 

Try a throttle tamer.

 

You don't gun it , that's how . You slightly tense up your hand to go fast . At 100 mph+ you are at about 4000 rpm and running on a whiff of throttle . You only crank the throttle on a Hypersports bike if you are drag racing or trying to hit 160 + . Maybe you're just heavy handed .
Remember that with a CV carb ( or four ) you are simply feeding suggestions to a mechanically automated fuel metering system .

 

Thanks for the tip. If anyone knows about one that works with the Sportster let me know. The G2 Tamer Throttle doesn't seem to be available for the Sportster and I couldn't find any others either.

 

Ah ! now then , I wonder if someone has messed with the slide spring ?

 

thanks I'll take a look

 

No slide spring. The bike has a butterfly to just let in more air. It also has a throttle position sensor to let the ECM know what the rider wants.

I think you should just make sure everything is as it should be starting with getting the throttle cables adjusted properly.

The bike doesn't need any gimmicks.

 

Is your Sportster completely stock or does it have a stage 1 ? i.e. loud pipes and open airbox? If it is a stage 1, did you get a tuning box with it? only reason for asking is most tuning boxes offer the option of something to change the reaction of the throttle, from stock to very aggressive (Throttle progressivity) . Some like to have the aggressive option but most find it too jittery and causes symptoms similar to what you describe.
If you have a stock bike disregard the above.

 

Thanks for the response j_bee, it's stock

 

Like some mentioned, I simply had to give it some time for me to get used to the bike. I've ridden about 2000 miles since I got it in late August and eventually I acclimated to it. I didn't do anything special, I'm just used to it now and I'm able to control it. In fact I can actually picture me getting an even more powerful bike someday, as I can now feel the limitations of the 1200 (I wish I could get the Sportster S for the extra fun, but keep my 1200 Superlow Touring for weekends trips). Thanks for all the tips though, appreciate your helpfulness!