I am a new owner of a 2006 S50 that I bought used with very low mileage on it. I love the bike so far the only problem I have with it is at the engine peak just before you shift the bike into the next gear I am experiencing a loss of power. I admit I donĀ“t know the history of the bike and I know it needs a tune up. Can any of the experts out there give me some ideas on what could cause this problem. I did the cheap stuff already like change the plugs and put fresh gas. Thank you.