fcr carbs?

hot start is an option on all new big bore fourstrokes,if your bike floods.you pull the hotstart,and it helps it fire by forcing air flow
 
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Keihin FCR Carbs are for four strokes, it is the stock carb on many of them such as the yfz. They have an accelorator pump and diaphram/vaccum controled slide. They provide more accurate fuel metering for the 4 stroke motors that aren't subject to as much resonant pulse in the intake tract as a 2stroke.
 
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