Mike Bubs

Can anyone offer advice on where to start looking to solve this problem? XTZ 660 1992. The bike generally runs well. However, i keep having the same problem that has developed recently - The bike starts fine and runs for about 5 minutes or so (or about 2-3 miles) when it simply stops. The fuel supply is fine and there's plenty of life in the battery but it simply will not fire up. Once cold again (leave it for a couple of hours) and the same thing happens all over again. I have the full workshop manual and have tested the coil which gives all the proper readings. Otherwise, I'm stumped! Can anyone offer any advice on what to look at next? Thanks Mike