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Hello just looking for some advise I got a skyjet 125 engine in a lexmoto xtrs frame it all runs okay passes mot etc but the question is when I’m riding it full throttle the revs seem to take way to long to go up in the high end and my limiter does not want to kick in unless I hold it flat out for around a minute going down a hill and it seem like when it limits the noise is coming from the head not the exhaust 🤨 I want to know what could be the problem? Thanks
 
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