Only if you live in a place that checks emissions, otherwise it makes the bike run much smoother.03SSgt said:This sounds kinda weird for me....
Exhaust Air Injection Block-off Procedure
OK, put the carbs back in the bike.
Notice there are two tubes ( one from each valve cover ) coming from the engine that meet at a metal assembly (exhaust air injection system). Here, one small tube goes down to carb and one large tube goes to the airbox (to the rear of the carbs). You must have this system blocked off or SERIOUS popping will occur. So, what I did was take a ball, about the size of the ball in my MS Mouse, and shove it in the tube coming from the black box. Then, I taped shut the hole in the air injection system that was left open from the tube. Then, just to be sure, I taped the tube back onto the injection system. This will cut ALL airflow to any of the other tubes, thus making the system useless and cutting ALL backfiring and popping out. The general idea is that you just have to stop all airflow between those tubes, the carbs, the valve covers, and the airbox. Do it however you like.
Took that from that carb tuning page, isn't it bad to do this????
Great step-by-step tutorial, however, I think he should've expressed the importance of thoroughly cleaning and deburring the slide lift hole that he'd drilled (...with the supplied Dynojet drill bit) Any particles get into those carbs, and the story gets really short, really fast!Freakinout said: