We need some help trying to solve a problem. We have a 2001 SXR 500 that sputters and bogs at low speeds and guzzles fuel. We have replaced the fuel pump, gone through the carbs many times, New needle and seats, reeds are good, changed the coil and ECU unit, tried different plugs. Jetting is dialed and when it reaches power band, it’s a rocket ship. We are out of ideas. Any help would be great. The sled is in primo condition.
2001 Yamaha SXR 500 sputters and bogs at low speeds
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