Owned a 1990 yamaha 535 for a month or two, no issues, went on a road trip to Bath from Stafford used motorway and A roads, sed for fuel in Bath and bike refused to start unless i jump started it in gear. The bike once started was not running right and so i called RAC who came out to it and diagnosed a faulty generator, got it home, replaced generator charged battery and bike restarted but is now bogging down it doesnt run as responsive as it used too, generator is pumping out voltage and battery is fine. Is it coincedence another problem may have cropped up, plugs look good tan colour, it revs smoothly no mis fire, any suggestions will be greatly recieved i am at the end of my tether as what to do next.