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Originally Posted by johnnyrod
The US 650 has PAIR a well doesn't it? The catalyst does need some air to burn the hydrocarbons and carbon monoxide in the exhaust gases, but it does some of this by using up the nitrogen oxides first. I'm not up on exactly how the SV1000 decides how it does it though. What was it you wanted to know?
Popping on overrun could be an exhaust leak near the heads, not necessarily the PAIR system. Not uncommon on bikes with aftermarket pipes.
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My plan is to totaly remove the pair system from my bike. The Popping on overrun is caused by this system but it does not always emerge untill you fit aftermarket cans.
The US 650 has PAIR a well doesn't it? Yes