Hi,

I was testing my 59 plate tenere, after fitting kev mod, riding slowly in first when metalic sound from the engine, rear wheel locked up and engine stopped. Pushed it home, not easy, have taken the cam cover off thinking cam chain may have broken but appears ok. The engine will not turn over on the starter but will turn one full revolution using a socket on the crank shaft bolt. Engine comes to a very solid stop afer one revolution. Bike will still select 1st and 2nd gears.

I have owned the bike 7 months, 37,000 miles, previous owner did majority of the mileage and serviced as recommended. I have cover about 2000 miles mix of commuting and greenlanes.
Any suggestions what it could be?

Many thanks