10-10-2023, 11:29 AM
Probably an outlier issue with that cylinder head. Things that are manufactured by humans and assembled by humans sometimes break. The number of CBs on this forum with WAY more than 14,000 miles would suggest so.
Max, I think there is a whole lot of difference between what goes on in the cylinder head of a 1960s-70s auto lube or premix 2 stroke and a modern computer controlled four stroke with oxygen sensors, fuel injectors, fuel pumps and pressure regulators.
Haven't we been led to believe that due to having to meet emissions restrictions, that our bikes tend to run lean, particularly at low rpms, and not rich? I believe that's what we've been told for the last 20 years and why the aftermarket makes electronic boxes which are sold to enrichen the mixture at low rpms.
I know my automatic transmission Honda cars ran hundreds of thousands of miles, never exceeding 3500 rpms and rarely exceeding 2500 rpms. I used mine for over the road sales and at freeway speeds where mine spent the majority of their lives, they never exceeded 1500 rpms. My DCT Honda motorcycle is programmed by Honda to run in the 2500-3000 rpm range, above that it will automatically shift to the next higher gear.
Could there be carbon build up in the cylinder heads of those vehicles? Probably I suppose, but not enough to inhibit noticible performance, gas mileage or engine longevity.
Ride more, worry less.
Max, I think there is a whole lot of difference between what goes on in the cylinder head of a 1960s-70s auto lube or premix 2 stroke and a modern computer controlled four stroke with oxygen sensors, fuel injectors, fuel pumps and pressure regulators.
Haven't we been led to believe that due to having to meet emissions restrictions, that our bikes tend to run lean, particularly at low rpms, and not rich? I believe that's what we've been told for the last 20 years and why the aftermarket makes electronic boxes which are sold to enrichen the mixture at low rpms.
I know my automatic transmission Honda cars ran hundreds of thousands of miles, never exceeding 3500 rpms and rarely exceeding 2500 rpms. I used mine for over the road sales and at freeway speeds where mine spent the majority of their lives, they never exceeded 1500 rpms. My DCT Honda motorcycle is programmed by Honda to run in the 2500-3000 rpm range, above that it will automatically shift to the next higher gear.
Could there be carbon build up in the cylinder heads of those vehicles? Probably I suppose, but not enough to inhibit noticible performance, gas mileage or engine longevity.
Ride more, worry less.