Hawk 250 Throttle Hesitation

DHH 32 · 08-17-2018, 11:20 AM

Hello everyone. I just did a valve adjustment (.002 in, .004 ex) and installed a mikuni carb with 110 main jet. The bike started up great and I could hear the valves tapping slightly. The only problem is that there is a slight hesitation in the first 1/4 inch of throttle. What are the most likely causes of this? It never happened with the stock carb. FYI I live in the Houston, TX area, elevation ~100ft. I have done the airbox mod but still have stock exhaust.

Question on the valve adjustment. It was a completely cold engine. I adjusted the valves to where the desired feeler gauge had slight resistance. However, I could squeeze the next size up in the gap with a little force. Two sizes up could not fit at all. Is that ok, or are they too loose?

Thanks!

08-17-2018, 11:20 AM	#1
DHH 32 Join Date: Aug 2018 Posts: 18	Hawk 250 Throttle Hesitation Hello everyone. I just did a valve adjustment (.002 in, .004 ex) and installed a mikuni carb with 110 main jet. The bike started up great and I could hear the valves tapping slightly. The only problem is that there is a slight hesitation in the first 1/4 inch of throttle. What are the most likely causes of this? It never happened with the stock carb. FYI I live in the Houston, TX area, elevation ~100ft. I have done the airbox mod but still have stock exhaust. Question on the valve adjustment. It was a completely cold engine. I adjusted the valves to where the desired feeler gauge had slight resistance. However, I could squeeze the next size up in the gap with a little force. Two sizes up could not fit at all. Is that ok, or are they too loose? Thanks!
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