legendprice Posted September 25, 2013 Share Posted September 25, 2013 I have a 1979 Yamaha XS750S which I have recently purchased, I have changed the oil , and filter. Put high octane gas 92 in the bike and now I noticed when I get up to 5000 RPM and over which is way before redline the bike starts to sputter and choke, As if its not getting fuel it begins to cut out. I am wondering what areas to address first and if there are any veteran mechanics on this site please advise me as I can not afford to send it off to the shop they will rape me in hourly wages to do any sort of mechanical repairs ! Any and all advice would be greatly appreciated. Dave Link to comment Share on other sites More sharing options...
Moderator drewpy Posted September 25, 2013 Moderator Share Posted September 25, 2013 try a bit of choke and see if it helps. Its not really a choke but an enrichment device so your adding fuel.# could be that the carbs need cleaning as with all old bikes Link to comment Share on other sites More sharing options...
legendprice Posted September 25, 2013 Author Share Posted September 25, 2013 Thanks Drew I am going to try it asap. I did spray carb cleaner in the carbs when I first got the bike while it was running and I added seafoam , TO help clean out the lines and carbs as well ! I will get back and let you know what this choke while reaching 5k and over and how it reacts ! Good place to start ! Link to comment Share on other sites More sharing options...
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