RPM and Speed

[Flyguy]

Scythian wrote:

These 'new' engines are just incredible--compared to even 20 years ago. It's more like a modern aircraft engine than anything....

Actually, much more advanced than aircraft engines. Due to the FAA's policy of "beyond ultra conserative" posture on anything new and the expense required to bring improvements into acceptance, pilots have only recently seen now old tech such as electronic ignition. Continental and Lycoming require over 360 cubic inches to extract 180 hp. (30.51shp/liter) Even at that low stress they are only rated at 1,800 hrs between overhauls and cost $27,000! By comparison the FJR motor is rated at 111.78shp/liter (3 times as much) and has been regularly known to go 200k miles (about 4,500hrs)receiving probably 1/2 the care and feeding of the aircraft powerplants. Knowing Yammy if you bought one without the bike they would probably cost the same. :glare:

I agree with your intention to say they were incredible works of enginneering. Thought the comparison might be interesting.

 

[dcarver]

Over Easter weekend I left the 'Springs and rode overnight to Phoenix, yeah it was all slab, and it sucked, but I was able to ride pretty much any speed I felt like. I-40 is curiously devoid of the Po-Po at 2am. I found myself creeping up to speeds over the ton. In fact "in theory" :lol: I spent more than a few lonely minutes at an indicated 125. This put the tach at over 6k RPM! I felt more than a little apprehension regarding leaving my engine running at nearly 3/4 redline for, what would have been, had I done it, an extended period and backed off for speeds in the double digits. Any harm in this? The bike sounded great, my MPG went to ****, but it left me with this burning question... Is 100+ too much for the FJR to cruise at for lets say a full tank of gas??

.. at least you won't have low compression due to carbon under your valves...