Re: yamaha g2 bogs at half throttle through full throttle
What is a surge tank? This is usually because if there is any leak or modification to the airbox/intake or exhaust the cart will run lean. Either you fix the leak or jet the carb richer by enlarging the main jet until it runs well. Before you do any of that, you must make sure you have good fuel flow and the carb is not dirty. Fuel should spurt out of the carb hose on the starter, you need to spray carb clean through the passages at the least to ensure the jets are clean, and clean the bowl. Spray up the main jet at center bottom, spray through the idle circuits, the air jets at intake of carb. Don't over tighten the carb bolts and break the spacer so it leaks.
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