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Hi every bods !
Have this problem. My bike is suffering an intermitant flat spot, runs well for up to 10 miles. It then starts happening around 5-6 rpm power loss through the cylinders for a few seconds, then will fire off again like nothing has happened. Have had it in 2 shops, and they are both stumped. so its time to ask the bods who wear the tee-shirts. I have changed the coils, the voltage regulator, and the dci unit. good Spark is running to the plugs at all times, thinking it may be something on the engine side, breaking down when to hot. Look forward to hearing from sum-bod with an idea.

Thankyou
Mr bean
 

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RESIDENT ASSHOLE
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I can hardly understand what you're asking
 

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I would check the carbs, remove and replace intake orings or seal with yamabond 4 and see what happens. Do you have stock air box and filters? Chech diaphragms in carbs for small hole, check fuel level, check needles in slides
 
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