I called DK when I placed my order. Talked to Dawn. She was very helpful in advising what size to get. She also saved me some money on my order.

 

i still think the 258's are too big and restricting the flow too much. ive lost top end pull when rolling on throttle, 95% of my commute is at 75-80mph in 6th it doesn't pull as well on top with these in. pulls alot better on low end though.

also it seems the motor is alot hotter when i get to work

anyone else experience the same thing?

 

I never noticed any top end loss. I did get a bit more heat, I think in part it was die to how well they scavenge exhaust putting you right on the edge of needing a tune. I also have a 103HO so I had an open element breather similar to the ventilator stock which may have added to the lean condition in my case. Do you have a tuner or anything on yours?

 

no tuner, just VIED's set at 50%
factory air filter, and cover, the baffles were removed when i bought it.

 

You may try turning them up some, I think I had mine at 70-75 when I had that setup. I would bump them up 10% and see if it helps.

 

Just seeing this! Sorry!

I would recommend going with the 158 Model TTI's for your bike.

If the diameter was AT LEAST 3" or larger, then you would need the 258 Model.

 

I just measured the baffles out of my 16, they are 3 1/8. I know it's a different year but I'd be surprised if they made that small of a change to an exhaust design. But it couldn't hurt to try a different size if it feels choked off.

 

I removed the TTI's last night and they measured just over 2-5/8" OD, pipe ID is 2-7/8ish...

so I resized them on the bench grinder to 2" OD and will reinstall them tomorrow on my day off and go for a run.

I'm hoping that will work better for my application.

 

After, modded to 2"
Before at 2-5/8

 

Did you notice much difference?