Need some advice, in fact most likely a lot of it. I’ve recently bought a 520sx kept up with the maintenance. But now like all bikes is causing some problems. I can start the bike, but to keep it running you have to keep the revs up. This started out of the blue 1 second it was running the next it wasn’t nothing was adjusted, not bang or cracks or falls.
I need to get as much information as possible on engines how they work how to fix them, check them, doing anything really. A dummies guide to 4 strokes would be ideal.
Any help at al would be more than appreciated