Yes, Jimmy, it is an emissions thing. When you close the throttle down, the PAIR Valve system opens up, and draws fresh, filtered, air from the intake filter box and dumps it into the exhaust ports. If there is un-burnt fuel in the exhaust, the PAIR-injected air mixes with it and you get sort of an "after-burn" effect, lowering the emission of un-burnt hydrocarbons from the exhaust. The after-burn effect is one source of the "popping" you can get upon throttle shut-down. If you're not concerned with having to pass emissions/smog tests with your bike, then blocking-out the PAIR Valves is the way to go.Tony
Great photos.....I just ordered the dimple block off plates.
My scooter is in the shop for the AFT engine mod and now is the time to block those areas off upon reassembly. Lastly, what purpose did those valves serve? Is it an emissions thing, or what?
get a pair of block off plates on there and put that crap in a crap can.Question. I have installed the cobra swepts and cobra computer.
With baffles in had popping. Plugged pair valve at air cleaner and had more popping with some kind of coughing at idle. Reinstalled hose and a week later removed baffles. Popping louder. Plugged pair valve at air cleaner and both heads. Still had popping. Do i have to disconnect pair valve? Help please.
Not certain, but I think you may be getting "reversion". You're running a bit on the rich side, IMO, which would aggravate the condition. Before changing anything else, try 1-2-1 or 1-2-2 and see if that reduces the popping. Could also be an exhaust leak around the head/pipe gasket.Well first i wanted to try plugging to see if the pop will go away. If it did i will install plates. Do i have to change settings on fuel computer right now setting are at 3 2 2. Any other suggestions?