Old (2000) KTM 200 - Runs great, except a surging stumble when I come out of the woods and get on it. That was with NOZH needle, clip on top (lean) groove. Moving clip down made it worse. Figured I need a NOZI or NOZJ, but didn't have one. Of all my spares, an N85D looked close and a little fatter. Runs great with clip on top (lean) groove. Dropping 2 grooves makes it just like before. So, I am running it at second groove down now and feels good. SO - Can anyone tell me how these two needles are supposed to compare? Is one supposed to have more top end or better sound or what? Or just different brands?