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Join Date: Nov 2007
Location: Chandler, Arizona
I have a CA model, and removed ALL parts of both the air injection system and the evap system. That's a LOT of parts, about 20 pounds worth. But the bike runs great. You may have an air leak somewhere.
The airbox. You have 2 choices. You can cut up the airbox and remove it, then get a complete "earshave" kit, which includes all the parts to do the job right, including new carb jets.
Or if you want to keep the airbox, and the stock filter housings, you can get the carbs out by removing the gas tank, removing the rubber ducts that connect the carbs to the airbox (surge tank), then wrapping something around underneath the airbox and over the frame backbone tube to hold the airbox up out of the way, so you can get to the carbs. It's still a bit tight, but much easier. Loosen the clamps that hold the carbs to the manifolds, spray WD40 around the connections, and work them loose. Both carbs come out together. They are actually one piece. Leave all the cables on them until you get the carbs out, and make sure you put them back on before reinstalling the carbs. It is (almost) impossible to put the cables back on with the carbs in place.
But either way, all the crappy emissions garbage needs to go. My bike runs much better, and even a bit cooler, since I removed all that crap. If you remove the emissions crap and keep the airbox, you will need to plug 2 holes in the airbox, and a vacuum fitting on the rear carb. If you have 2 connections at the rear of the tank, just put longer hoses on them, and run them out underneath the bike somewhere, so the tank will be vented to the atmosphere as it should be. Jerry.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike