Quote:
Originally Posted by mrf6969
You need to remove the spark arrestor. A spark arrestor screen is a device designed to prevent fires by stopping sparks or flames from escaping. There are two common types:
Screen type: Uses a metallic mesh to prevent large particles from leaving the exhaust system. Commonly used on motorcycles, ATVs, golf carts and small engines.
Known to cause your issue.
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Totally agree. I had the same problem slowing excessively over the bridges. Had spark resister removed and problem solved. Many friends had same problem and same cure.