I have an '05 AC 500 with 150 miles. The last time I rode it a couple of weeks ago it ran fine. Now it starts fine, but as it warms up a little it continually dies and sometimes backfires. I took the carb off and inspected. It's clean as a whistle, no build up or trash. There didn't seem to be much fuel in the carb, but it may be normal. Fuel tank is almost full. What's up?

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Mike Montgomery

Sounds to me like it's not getting fuel. If your sure the jet's are clean and not gummed up I'd disconnect the fuel line and make sure fuel is getting through the petcock.

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-YFZ 450
-Graydon Proline Exahust, Maier Plastics
-'98 Warrior (Lady's Ride)
-1/2 a 1987 Honda Odyssey

SOLD
-'98 Blaster, FMF pipe
-'02 400EX 426 big bore, White Bros. E-Series, FMF Powerbomb header

O and welcome to the forums.

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-YFZ 450
-Graydon Proline Exahust, Maier Plastics
-'98 Warrior (Lady's Ride)
-1/2 a 1987 Honda Odyssey

SOLD
-'98 Blaster, FMF pipe
-'02 400EX 426 big bore, White Bros. E-Series, FMF Powerbomb header

Does yours have the auto choke?

A buddy of mine has a 650AC. It started running crappy once warm. From what he described the dealer knew immediatly it was a problem with the automatic choke, and fixed it promptly.

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680 Rincon camo, Foreman headlight, xt30, guru bumper
500 Foreman FM green, 2500 warn
Kit Patio Hauler 295F 5th wheel
Ram 3500 Laramie quad 4wd

if your petcock was open+not much fuel in carb then change fuel filter...................

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01 SCRAMBLER 500 4X4/#170 MAIN JET,JET NEEDLE RAISED 2,1-1/2"FRONT WHEEL SPACERS,POLARIS SPEEDO+LOW PROFILE SHIELD,KEVLAR DRIVE BELT,WIDER SWAMPLITES,BICYCLE HAND GRIPS,GIANT IGUANA NAMED "CHUCK"