Hi, I am a new member and would appreciate some advice. I was riding around on the weekend, put about 500km on driving out to visit my parents, bike was running great. The next day I went for a quick evening ride and lost power on the highway - I couldn't maintain highway speed - I limped back home on the shoulder. I field serviced the carb and found some grit in the bottom of the float. It ran great after cleaning it out - so after doing some shorter rides I was confident it was fixed. Went riding pretty hard all the next day around some some old decommissioned logging roads, put about 200 km on it during the day and then went for a quick fishing trip in the evening. On my way home I was on the highway doing about 110km/h when it suddenly lost power. I thought maybe I was out of gas, was reaching for the reserve and slowing down when the rear tire suddenly locked up and skidded for about 20' before I could pull the clutch. I got it pulled off the road. Now it won't start. I pushed it the rest of the way home. The next day I replaced the spark plug, it has spark. I checked the carb again - its clean, The petcock and vacuum lines seem fine as there is fuel in the float and it flows from the tank when I apply vacuum. Can anybody tell me why this might have happened and what the next steps for diagnosis would be?