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Just used my colortune I got for Christmas for the first time.
I used it on my XJ650 Maxim. This bike was a basket case that got put back in running order from all the help on this site (It's amazing who similar the two bikes are in what needs to be done to get them running.) The first owner put on 4 into 1 headers and the butchered the air box to try to get it to run right. The second owner rejeted the mains to get it to run over 3000 pretty well.
My first job was to go back to a stock airbox (the conections from the air box to the carbs were three stock and one nobody knows what bike it came from.) This solved some of the problem but not all. It need some choke to run well at low rpms, would stumble and cough, and then take off like a bat out of hell once it fit 2000 rpms. The carbs are clean with no air leaks and sync'ed. Not being a carb man I could guess that the pilot screws need to be set richer but didn't know who much and could never find the sweet spot. Enter colortune, I took the bike for a 15 minute ride to get it up to temp, used the colortune per the tech tips, it took a little to figuer out the color to look for. It was very easy to do (about like sync'ing the carbs), resync'ed the carbs and all I can say is it is a great tool for those that can't adjust carbs by ear. The bike runs smooth from idle all the way up, AND throttle responce is nice and predictable.
I used it on my XJ650 Maxim. This bike was a basket case that got put back in running order from all the help on this site (It's amazing who similar the two bikes are in what needs to be done to get them running.) The first owner put on 4 into 1 headers and the butchered the air box to try to get it to run right. The second owner rejeted the mains to get it to run over 3000 pretty well.
My first job was to go back to a stock airbox (the conections from the air box to the carbs were three stock and one nobody knows what bike it came from.) This solved some of the problem but not all. It need some choke to run well at low rpms, would stumble and cough, and then take off like a bat out of hell once it fit 2000 rpms. The carbs are clean with no air leaks and sync'ed. Not being a carb man I could guess that the pilot screws need to be set richer but didn't know who much and could never find the sweet spot. Enter colortune, I took the bike for a 15 minute ride to get it up to temp, used the colortune per the tech tips, it took a little to figuer out the color to look for. It was very easy to do (about like sync'ing the carbs), resync'ed the carbs and all I can say is it is a great tool for those that can't adjust carbs by ear. The bike runs smooth from idle all the way up, AND throttle responce is nice and predictable.
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