I want to get a better sound out of my bike but I don‘t want to buy a jet kit or a high price muffler and intake system. My question; Can I just remove all the filler from my stock muffler to get a deeper tone? I keep reading that if I don‘t get a jet kit while increasing my exhaust flow that I could damage valves, but that doesn‘t seem plausible considering that everything I am reading says that having a more open exhaust increases EGT (Exhaust Gas Temp), but common sense would tell you that having a better air flow would cool it down right?? I‘m not looking for a performance upgrade because I‘m on a Hyosung GT250R and it‘s not like I‘ll get that much out of it. I just want a louder and little bit deeper tone, is that too much to ask without spending $800?
Good info given, assuming your bike is a 'carb' model. If it's fuel injection it's some what of a different situation. Ask your local bike make dealer for more info or if there is a web site for the owners club, post a question there. I changed pretty much most of my exhaust system with no problem and it's fuel injection so no messing about re-jetting. Hope this helps a bit.
NO IT WILL BURN UP THE MOTOR SOONER RATHER THAN LATER. BUY THE JET KIT, BUY THE PIPE, DO IT RIGHT ONCE. increasing exhaust gas temperature (INSIDE THE ENGINE) that is not where you want the heat YOUR ENGINE CANNOT TAKE THE HEAT, AND IS DESIGNED BY A ENGINEER TO RUN EXACTLY AS HE DESIGNED IT TO.UNDER THE CONDITIONS HE DESIGNED THE MOTORCYCLE FOR you have to understand, you may have great common sense but you do not have an engineering degree. I don't either but I do know that several friends of mine who want the perfect sound, but thought they could do it there way because they didn't want to pay the price.they tried drilling holes, steel wool and none of it worked for long anyway what is cheaper, a brand new motor and tranny AND that 800 dollar exhaust system ??? or just buying a jet kit and the right exhaust set up ??? and in any case I have a feeling you are going to upgrade to a bigger better bike sooner or later, look for one that has a muffler you like then. what do you think? good luck however it works out.!
On a 250 motor you will lose some bottom end power by opening up the exhaust. Try drilling out some of the baffle or removing some of the packing from the muffler. This will hurt your bottom end power though.unless you re-jet and tune the carbs to match the changes you make.
