Voni and I have spent the summer traveling on motorcycles. The bikes, her K75S now at 90,000 miles and my R1150R now at 123,000 miles have accumulated together just over 46,000 bike miles since we left home. While they performed well, they were not flawless. Some maintenance needs were expected.

Questions and Answers with Paul Glaves.

Last month this column discussed the combustion part of the operation of internal combustion engines in general terms. This month I want to zero in on the combustion problems sometimes encountered with Oilhead BMW motorcycles in more specific terms. The Oilhead BMWs are the R1100 and R1150 series bikes. Most of the comments also apply to the R1200C cruiser motorcycles, and many also apply to the R1200 Hexhead motorcycles.