1985-1986 Honda ATC250R Shop Manual, Page 232Get this manual
16TROUBLESHOOTING ENGINE DOES NOT START OR IS HARD TO START ENGINE LACKS POWER
16-1 16-2 16-3 16-4 16-4
POOR PERFORMANCE AT LOW AND IDLE SPEEDS POOR PERFORMANCE AT HIGH SPEEDS POOR HANDLING
ENGINE DOES NOT START OR IS HARD TO START
CHECK 1Check if fuel is reach ing carburetor FUEL TO CARBURETOR SYMPTOM NO FUEL TO CARBURETOR PROBABLE CAUSE No fuel in fuel tank (2) Clogged fuel line or fuel filler on Carburetor (3) Clogged carburetor float valve (4) Clogged fuel tank cap breather tube
2Remove spark plug DRY WET 3Test spark SPARK JUMPS
Carburetor flooded Carburetor starter valve stuck open Damaged starter valve seat Throttle valve adjusted to low
NO SPARK OR SPARK (1) (2) ISWEAK (3) (4)