2003 Honda CB900F Engine problems

After any amount of time spent on the motorycle, an unbearable odor from the exhaust similar to stagnant sewage emanates from the exhaust. This has occurred throughout ownership and is widely reported by other owners. Honda nor a local dealer did not acknowledge the issue when contacted. An independent mechanic could not find any cause of the odor. The odor causes severe headaches, lightheadedness, and nausea. The odor emanates at idle, at speed, during cold starts, warm starts, and at shutdown. The odor is noticeably stronger when the engine reaches operating temperature. *Tr

While riding this motorcycle, exhaust fumes will permeate the back of the riders clothing, back packs and passengers, leaving a nasuating odor that is unbearable to be around. This occurs with riding trips that are as short as 15 minutes. Passengers complain that they can smell exhaust fumes while riding, causing headaches, nasua and dizziness. Spoke with the dealer about known problems with this model, and they knew of none. Check out bike and found no defects. Spoke with "jared" at american honda in ca...

Excessive unburned fuel vapor/fumes emitted from exhaust of motorcycle "03 honda 919 from first day of ownership through 2000 miles. (6 Months) protective riding gear saturation, and inhalation/lightheadedness had been experienced. Had performed lab testing of manufactures oil having shown excess fuel/ crankcase oil dilution, and extremely reduced viscosity (first interval 40wt down to ~20wt) with oil well below specification, and before recommended drain intervals. Have documented lab data record to support....