Need help I have a 99 sport 400 it bogs down when taking off but after u get going it runs great what could cause that.... thanks for yalls help

 

Loading up from too much fuel in most cases until you have enough rpm and speed to accept the fuel. This usually is from a worn needle and seat or float level off or both.Plus too large of a main jet can do this also,but if stock I'd suspect the carb. If you have to remove a carb install a new carb kit. The kit costs less than an oem needle and seat.Along with the carb don't over look simple things like a dirty air filter. Can do the same thing.Plus here's the fuel section from the manual that can help you along with checking the float arm level. https://www.google.com/url?sa=t&rct=...,d.aWw&cad=rja http://www.ebay.com/itm/CARB-REBUILD-REPAIR-KIT-POLARIS-1998-1999-SPORT-400-2WD-2X4-98-99-/370626988836?hash=item564b170b24&vxp=mtr