Question about 2003 kawasaki VN 1500 Vulcan Meanstreak
Most of the time, on new bikes, the computer will handle all of the changes to the engine that come along, but it might not do them all. I would check out the intake. You changed the exhaust, from stock, and never reprogrammed it, but it is running different, try cutting pieces of cardboard to fit in the intake , just over the filter to slow down the air flow, and then if that doesn't do anything, get a fancy airflow filter to let more air in. Anything other than that, I would put the old pipes back on and see if that is the problem. Check it out, hope this helps.
Posted on Aug 29, 2010
You have a fuel injected motorcycle. When ever you alter the intake or exhaust you have to put a Power Commander on the bike or it will not run correctly. Motorcycle fuel injection systems cannot properly compensate for the changes you made to the intake and exhaust systems on there own. Automotive fuel injection systems will compensate for a much wider range of variables.You Do Not mention if you have added a Power Commander or not. A Power Commander allows you to hook your motorcycle up to a computer and change the performance curve of your CDI box to match your accessories In this case you need to remap for the Hyper charger and the Vance and Hines exhaust. If you already have a Power Commander installed on your motorcycle you should hook it up to your computer and try remapping the system. The program that is currently there is not adequately compensating for the conditions that are causing the misfire. Some times it takes several tries (remapping attempts) to get a machine to benefit from the changes you make. If the bike was purchased already modified and you did not get the computer cables and programs to change your Power Commander, many dealers have the equipment to reset the system for you.
Posted on Aug 28, 2010
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Posted on Jan 02, 2017
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