Iv recently been out quite a bit on my dt with mates but one night i come off it :/ then it started fine and about 10 mins after wouldnt start again left it at a mates and he changed the spark plug and then started fine but i was running an iridium spark plug and he put a normal one in it now and the same thing has happened :/ wanted to know why its eating up the plugs so quick
Also few months back done quite alot of miles in one night was about 60 miles from home :( and the bike decides to mess up on me was just going along then all of a sudden in every gear the bike was making a grinding noise and lost alot of power in every gear but i just left it for a day started it and it made the same noise then next day was absolutly fine and hasnt done it since no idea what was up with it
pull the magnito rotor off and check the key way(wudruff key) and stator if some things moved or come loose it will grind and nock the timing out causing irratic running and grinding noises
have a look around the clutch see if nothings come loose and catching either way i wunt be running it untill youv had a good strip and look to see whats causing all the problems or u may do irepairable damage
no idea what was up with it 
