Last fall I over wound the engine once and it ran alittle rough when I put it away for the winter. This spring I was running around on it and it was doggy and wouldn't go much over 80mph. I put an ajustable set of needles and bigger jets. it is way quicker in first and second gear than it ever has been but it still only runs about 80. It felt like it was running out of fuel so I put a snowmobile pulser (vacum fuel pump ) on it and it still only goes about 80. I put new plugs in it and it still feels like it runs out of fuel or has a rev limiter still at 80. I ran 130mph last fall before I over reved it but It felt weak. It must not be fuel because I raised the float levels till they over flowed then backed them down till they didn't leak. Have any Ideas's??