I’m riding a Daytona 675 and I have replaced the undertail stock exhaust with a side tri-oval. It has shown some benefits when it comes to high RPMs(2-3 hp increase) however, sound is the best thing. It is VERY bassy and loud enough(a bit illegal but just above the limit), it gives that characteristic Triumph Triple growl in a way it compels people to notice it. This has clearly given me an advantage in the traffic where car drivers can hear me coming. However, I have a question. Is there any chance that using an exhaust different than the stock and approved ones(such as Zard and Arrow) could result to a damage of some sort to the engine? I’m asking this because the Daytona exhaust is very unique. The piping changes girth from thinner to wider and it results to three exhausts(exhaust ports is the right word?). Someone told me that perhaps the fact that the piping of my exhaust is a bit shorter than the stock, it could damage the engine. Zard however is making a side exhaust for the Daytona which is much shorter than mine. Oh well…
Theoretically there is a very slim chance that the can could be causing your bike to run too lean which would eventually lead to the valves burning out. In practice its very uncommon for this to happen just from changing the can alone as the manufacturers spend a lot of time and money on design and development these days.
It would be worth getting your bike booked in at a Dyno shop to get it set up all the same:)
