+1 with Galaxie, you need to do what he says so you can get your setting back to a runnable baseline. It may still need small adjustments from there but until you do what Galaxie listed we can't really give you to much more to go on.

Oh and if you search some on airbox's it won't take long to find out that any modification to the vtr's box will result in disaster. Most people also have had better success with stock filters and carb tuning vs KandN although if you really want to retain the cleanable filter option BMC has a street version of their filter that I haven't heard complaints about.

The VTR is a harder bike to tune because of two factors. Large pistons suck in huge gulps of air along with large carbs make for the need for a really precise airbox design to keep airflow as smooth as possible in the ensuing storm of massive gulps, small changes make for dramatic and usually negative results.

 

As soon as you hear "flat spot" you know either or both K&N and Airbox are right behind it..

Don't mess with the stock Airbox, your ghetto mods will only mess it up and unless you have already modded the engine with thousands in pricey parts the K&N won't gain you any power and will make it harder to tune the carbs.

You can make a K&N work right, but it is usually more effort than it is worth. And 99% of the time you can NOT make a modded airbox work right.

 

+100!

 

Airbox is "cut open" it said...right?

 

Thanks for the help guys! I bought the bike this way and just trying to get it to run right.

 

I also have this bike and I love it. It is known in the U.S. as the SuperHawk, outside the U.S. it is marketed as the Firestorm. The looks of the SuperHawk are lean and clean. Not too much fairing to cover up the V-Twin powerplant, but just enough to shroud the twin radiators and provide some paintable surface.