OK, just bought a 2007 Honda Shadow Spirit 750 with 8k. Very clean. 1 owner. When the bike is cold it shifts beautifully. But when the bike/engine is warm and running it's hard to get the tranny to engage in neutral and shifting becomes very notchy. But as soon as I turn off the bike, it shifts fine into neutral. I just changed oil with Honda GN4 10w30. No differences. Please help.