For some reason or another I am having a great deal of difficulty getting some "positive" gear shifting. The problem is prevelant between 5 to 6 gears. I do not know what I am doing wrong but I almost always happen to find that stupid neutral (false) between the gears. Is it my foot position or am I not shifting "hard" enough. Any tips? BTW the bike has 140 miles on her. Not broken in yet.