Ok mine is starting to lerch when you are letting it out on the start gate. I have run Hondaline GN4 oil in it since new, except I just switched to Mobil Delvac 1, could this be the cause? I am going to switch back to the GN4 and replace the oil filter. I didn't notice any debris in the oil after I drained it, it did not smell burnt and was not discolored. Some people say that the clutch on these bikes do not get enough oil and that the clutch plates are dry, is this true?