Having a tuning spree and getting two of these...

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http://cgi.ebay.com/ebaymotors/15HP...001QQitemZ110025288128QQrdZ1QQsspagenameZWDVW







...they plug into the oxygen sensors and richen up the fuel/air mixture. With me new Staintune pipe & K&N air filter ( when it arrives ), i'm hoping for great things
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I've fitted them onto my bike but can't say i've felt any difference.

I think all they are is a resistor, which fools the voltage into squirting more fuel into the engine. I've got my bike booked into a dyno shop on the 29th of September so will do a run with 'em in, a run with them off ( standard set up ) and a final run with the sensors disconnected. The bike is definately running richer but it doesn't feel any better than when running without them. The dyno shop does a gas analysis so that will be quite interesting.