100" RevTech losing spark!
Hello I have a custom bike running a 2002 revtech 100” engine and lately I have been losing spark. I can take it for a ride one day and not have any problems and then the next I can run it for a couple miles and then it will start missing real bad and eventually quit, when it quits I can pull over and let it sit for a minute or two then it will fire back up but only for about a ¼ mile then it will quit again. I first thought it was fuel related and went through the carb and installed a new fuel filter, no fix. I installed some sparkies between the coil and spark plug so I can monitor spark to find out I was indeed loosing spark when this happens. Anyone ever have a problem like this or know what my problem might be, I am suspecting a coil but would like some advice before ordering a new one. Thanks for any help.