I have some factory Suzuki documentation explaining why the TL is noisy and how to fix it. Will go look for them tomorrow.
When these bikes were new I worked for a Suzuki dealer. A sales manager had a TLR which was set up really well, engine and suspension mods, was very nice to ride. Especially after riding a stock TLS.
And after the TLR I rode a stock Duc 996 and that pissed all over both Suzukis. But at a price.
Now look at this