The primary purpose of modern motorcycle exhausts is to cut emissions and noise as required by law. More stringent regulations are the reason why bikes are getting HEAVIER year after year.
The Versys is built to pass Thailand's extremely strict emissions requirements. The Thai emissions standards for motorcycles are extremely strict and are in some ways MORE strict than EURO III emission regulations. It's also the reason why Yamaha only sells California CARB spec bikes in Thailand.
The stock exhaust on your Versys weighs about 20 pounds.
Not only is it very HEAVY, it also restricts the power of your bike. Most aftermarket manufacturers publish dyno charts showing the increase in power and torque that you can achieve by using their product. Most aftermarket exhausts have been shown to give the EX650 a modest 2-3 Hp gain. Opening up the airbox, adding a fuel injection module and ignition booster are all effective ways of gaining more power as well.
In addition to an increase in power and torque, aftermarket cans cut SIGNIFICANT weight.
Cutting weight improves performance. Most aftermarket cans weigh about 3-5 pounds.
Sure, imported exhausts often do retail for as much as 18-20k Baht here in Thailand thanks to the hefty import duties, but you can buy a decent aftermarket can from abroad for a whole lot less and carry it over in your suitcase. Or if you have it shipped even with the cost of shipping and duty you'll likely still come out well below Thai retail.
There are some Thai brands now available for the EX650 as well that are a lot cheaper than import brands. DBS, Tyga and Tsukigi are a few of the cheap locally manufactured brands I can think of. I also know some shops in Bangkok that are selling knock-off Leo Vince's and Yoshimura pipes but no idea about what kind of quality you might expect from the knock-offs...
Ride On!
Tony
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Originally Posted by whitehead
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