Member Contributer Lannyl81 Posted January 22, 2019 Member Contributer Share Posted January 22, 2019 I have noticed since the cooler weather arrived (Oct- present) that upon engine start that one cylinder is not firing all the time. Depending upon the length of time since last ride and the air temp determine how long I let the engine warm-up before taking off. After about 2-3 minutes of slow riding through the neighbor and then out on a main road for a mile or so, all is fine and running strong and is fine the rest of the ride, but this returns for the next ride which is usually a week + later. I have not changed or even checked the plugs yet. I did pull the carbs off at the end of my first summer due to fuel leaking and then the next summer I had to replace the coolant O rings due to a coolant leak...but nothing else "engine-wise" in my five years of ownership other than oil changes. Just thought I would ask for comments/suggestions......thanks Link to comment Share on other sites More sharing options...
Wayfarer Posted January 23, 2019 Share Posted January 23, 2019 Looks like it's time to do the maintenance. Five years is quite a good result, how old is your bike? I think new spark plugs will help you to get rid of this issue. Link to comment Share on other sites More sharing options...
squirrelman Posted January 27, 2019 Share Posted January 27, 2019 most likely a clogged idle jet i'd guess 😣 Link to comment Share on other sites More sharing options...
Member Contributer Lannyl81 Posted January 28, 2019 Author Member Contributer Share Posted January 28, 2019 Since I have no idea the age of the plugs I do plan on replacing them before Spring arrives here. Clogged idle jet....guess it could be....if something got through the filter and into the float bowl on one carb and then clears-up after getting up to full temp....but then becomes clogged again when it cools down. I need to determine which cylinder it is somehow.....IR temp gun on the exhaust might tell me. Although just pulling the plugs and taking a look at the color might tell me or I could also measure the resistance of each one to see if one is higher than the other three. Things to try....when I have time. Thanks for the thoughts. Link to comment Share on other sites More sharing options...
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