TTR 50 no spark with electric start

Picked up an 07 TTR 50 for my son. First couple of rides it started fine with the e start. Now it will only start by putting it in 3rd gear and spinning the rear wheel. I replaced the battery, rebuilt the carb, and put a new plug in it. Starts immediately and runs perfect spinning rear wheel but nothing with button. I also checked the air filter and it's clean, no engine oil in the air box. Was messing with it today and there is no spark at the plug. E start spins the motor over great just no spark. Got a service manual and will start the troubleshooting process tomorrow, wondering if anyone has had this issue and can give me an idea where to start. Thanks.

Edited by rcgod

check coil with ohms meter. Check lose connections. If all else fails might bb cdi box. I have similar issue and read my post

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