Question about 2004 Harley Davidson VRSCA V-Rod
Carburetors supply a mixture of gasoline and air to the engine. The gas comes out of little things called “jets” (usually a pilot jet, needle jet and main jet). If you modify your airbox or exhaust to flow more freely, you get more air going through your system. This often means that there is not enough gasoline, so the engine runs badly. “Rejetting” means replacing or modifying some of these jets so as to supply gasoline differently than stock, usually more gasoline than stock. If done correctly, this allows your engine to generate more power, run a little cooler, start and run smoother and get worse mileage.
Posted on Nov 20, 2008
SOURCE: re jet the carburetors
The November 10, 2008 solution is correct but a bit more should be added. > > Forget modifing the jets. The effort will be a waste at best. Instead, just go to the dealer and tell him the problem. Jets are a VERY low cost item. If in a high altitude state like Colorado a smaller jet may be needed since less oxygen requires a thinner fuel mix. If at sea level, a larger jet may be appropriate. The only jet needing replaced at any time is the main jet. The needle jet is a variable flow jet and the flow is controlled by the throttle.
Posted on Mar 11, 2009
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