XB12 Drivability issue

[Buckschott2007]

I have an '07 XB12R with about 3000 miles on it. Starts fine, runs like a strippedassmonkey (SAM) when she is cool...engine temp, not the weather. As I ride around and she warms up, she has noticeable less top end. Bottom end is fine. Once apon a time, about a year ago, I totally lost one cylinder but managed to get her home at 30 MPH. I went to the shop to tear into it the next day and the problem would not duplicate, and hasn't since...I'm totally stumped. The lack of top end means on a straight away in high gear, full throttle, she goes about 95 MPH. It's like she is running our of fuel. No bucking or popping...just doesn't go any faster than 95. I can get about 115 out of her before she warms up.
Everything is totally stock, original spark plugs, wires, everything.
Thoughts?

 

[go cytocis]

The Cam Position Sensor is known to fail resulting in symptoms like you describe. Check the easy stuff first though: battery terminals, grounds, bad gas, plugs, leads & TPS reset may also be the cause and they're easy to rectify....