my ktm 144 wont start :(

I have bought a second hand motocross bike which has had about half a season of racing. It stopped working a while ago then i replaced the spark plug and it worked fine for about 4-5 weeks. now it wont start and i have no spark from the plug and i dont know what is causing this to happen the electrics look fairly rusty. any solutions would be much appreciated. i have had alo

This is a motorized bicycle forum not a motocross forum but let me see if I can help you.
You have no spark try a new spark plug gaped at the proper gap for your engine.
Check your wiring connections for broken or bare spots. You might have a bad coil or cdi so if you can get a shop manual for your bike or find a forum that you can address your problems to for more help.
If all else fails find a bike shop or mechanic to help you get it repaired. Hope you find your problem.
Norman

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