1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 117Get this manual
FUEL SYSTEMCARBURETION Carburetor DisassemblyInspectionKeihin 32Tip carburetors and remove bypass port cover
33Remove mid-range jet anti-siphon valve cover plate and inspect the valve (where applicable)The valve must lay flat against the plate to seal properlyReplace if distorted or bentReplace gasket if torn or damaged
34Remove main jet anti-siphon valve cover plate and inspect the valveThe valve must lay flat against the plate to seal properlyReplace if distorted or bentReplace gasket if torn or damaged