04TRX400EX 0 Posted April 23, 2023 My TRX400EX wont start, and I just rebuilt the whole top end, and put a big bore 440, I started it up for the first time, and there was a ticking so I adjusted the valves, after adjusting the valve lashes it wouldn't start anymore. It will fire up for a second after every couple full strokes, it has good spark, and I just replaced the carb too. Share this post Link to post Share on other sites
Fishfiles 20,147 Posted April 23, 2023 Hi , welcome to ATVHonda .... my first guess would be timing --- maybe a tooth off or 180 out -- did you recheck your marks Share this post Link to post Share on other sites
04TRX400EX 0 Posted April 23, 2023 44 minutes ago, Fishfiles said: Hi , welcome to ATVHonda .... my first guess would be timing --- maybe a tooth off or 180 out -- did you recheck your marks I was thinking it might be the timing since I had stripped the bolt on the crankcase so I had to take it off to try and get it top dead center, but I'll make sure to check the timing again. Share this post Link to post Share on other sites
04TRX400EX 0 Posted April 27, 2023 Turns out it was just the CDI box Share this post Link to post Share on other sites
shadetree 5,969 Posted April 27, 2023 29 minutes ago, 04TRX400EX said: Turns out it was just the CDI box thought you said it had spark ??. if it had spark to begin with ?, then its not the cdi !. 1 Share this post Link to post Share on other sites
04TRX400EX 0 Posted April 27, 2023 (edited) The CDI had continuity, and no continuity when i was doing a read in it, and I can't think if anything else, but I'll replace it, and see if that works Edited April 27, 2023 by 04TRX400EX Share this post Link to post Share on other sites
