Posted April 20, 20213 yr Hi, I have a yamaha dt50mx 1987 (Twostroke). And i didn't drive it at winter time so i let it sit. Today when i started it in months i heard a weird whistling sound from the engine area. It Gets louder as i rev it up. And I have checked for leaking air damaged gaskets as well as the airfilter and it sometimes stops getting spark and it stalls. And i changed the oil the day before. Video of the sound:
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