1998 WR400 - I checked my oil the other day before my ride and it seemed low so I added about 250-300ml (probably too much). Started perfect, ran perfect for about 5-10 kms. Stopped for 20 minutes, started it back up and 5 minutes down the road it started to cut out at cruising RPM ranges and then it would start back up and keep running. When I stopped and let it idle it would eventuallu cut out and stall. Kicked it over and it started right back up... the only way to keep it running was to rev it up a little so when it would cut out the higher RPMs pushed it through and it would keep going. So it cuts out every 10 seconds or so... drops the idle adn then picks back up again. No funny noises or banging, ticking... it revs free and feels strong when it isnt cutting out?? So I drained all the oil, filled it with 1600ml and it still does the exact same thing? Whats the deal? Did I bend a valve or is one sticking. I popped the top cover and kicked it through, it seems to be a little sticky or harder to kick than usual. Any info is appreciated. I just want to have some idea before I go to the dealer for a beating! Thanks.