Best rev range

[Tev62]

Maybe... it's just fun and does no harm. I mean... really. No one likes the thrill of acceleration anymore?

... there is a whole rider generation class of wannabee high-stakes (e.g. no riding gear, no helmets, etc.) on those extra high torque ebikes that the herded civilians are purchasing.

Tell me about it ... yesterday, at 407-ETR, I saw a beautiful blue K 1600 GT rider flying 145 km / h next to my car in t-shirt, shorts and sandals

... been seeing alotta squids on the Toronto-bound QEW freeway passing/lane snaking at ultra high rates, crouched down, and the back of their t-shirts riding up to their neck. Yeah. Nice boney spine.

... been seeing alotta squids on the Toronto-bound QEW freeway passing/lane snaking at ultra high rates, crouched down, and the back of their t-shirts riding up to their neck. Yeah. Nice boney spine.
It's good for the rest of us though, Darwin will take care of it

[j3gq_imp]

Reading this whole thread one more time, I come to the conclusion that most of what's been said on both sides is correct and indeed without (much) contradiction. In the beginning I had understood the PowerDubs is really meaning what he wrote : "I am a HUGE proponent of full throttle through full RPM fairly often". I read this (like others) as "run it at full throttle" and "keep running it at full throttle" . My answer and other answers do clearly discourage that, regardless of whether Honda did a good job, and whether the rest of your m/c goes first, or whether the engine takes its last breath while you own her.
But PowerDubs explained that this is not what he meant. And if his "full throttle"statement means rev it up more than once a year or once a month, this turns into quite a different story. I do fully agree that babying your engine ALL THE TIME won't do any good either, and that high flows, including high fuel burn and higher temps for a while are important. Just think that the same benefits might be achieved by running her at 4000 rpm/s for 10 or 15 minutes once in a while.
But there are always different ways to skin a cat. Choose your own formula of time x rpms.
I have learned (or at least been reminded of things learned in the past) from the thread. Thanks to Powerdubs, the Ferret, and all the others !!

[SportsterDoc]

Yea- other than the fact that I am a HUGE proponent of full throttle through full RPM fairly often on ANY bike / car.

Italian tune up is real- heat and full fuel injector opening and spray pattern cleans the injectors themselves, the ports, the valves, the piston crowns, and even out to the cat substrate core. Increased combustion pressures keep rings from getting gunked up and sticking.

I think it is reasonable to fully open the throttle on a regular basis (subject to interpretation), but that does not necessarily require high RPMs.

On fuel injection systems which I have become familiar, the ECU/ECM controls the fuel injector(s) duration...longer for more fuel...as the stroke and orifice to the nozzles is not variable.

In other words a signal from the ECU opens the needle/plunger from the seat for a mapped duration (pulse width).

Which system utilizes variable opening injectors? or did I misunderstand the above statement?

Kudos to j3gq for peacemaker roll!

[PowerDubs_imp]

You are correct- there is a duty cycle- which means how long the injector is open for.

Just like pulling a trigger on a spray bottle or your garden hose trigger- lower duration is less robust spray.

Everything with a mass has a stationary position- and a time for momentum to increase speed / distance / spread.

Open the injector in short quick bursts is less fuel- and less overall fuel spray wash.

Remember that engines will tend to run richer at higher load and RPM which means longer open pulses to give more fuel, more burn, more heat overall. Leaner at light cruise load for efficiency and emissions.

[j3gq_imp]

@sport, thanks for the flowers. I like the label peacemaker as it has so many meanings. Being as old as I am, it doesn't make me think of the UN forces trying to separate conflicting parties and keep peace. I am rather thinking of the famous 6, which "made" peace in the hands of a Texas ranger. Peace is of course peace, but not always by insight or agreement All of this of course had nothing to do with our discussion. as always, it gets most interesting where there is a friendly dispute. Just friendly exchanges of similar opinions are .... nice and boring.

[Ayrshire Dunx_imp]

My 2p - I definitely feel mine runs nicer after a good blast; we used to say "to blow the dust out"! The other thing I have always thought is if you want to ruin an engine forget about high or low revs. It is short journeys that don't give it a chance to get fully hot seems to wreck the oil and then everything else.

[GoldOxide_imp]

A flick from ol' faithful F9:





https://youtu.be/zhUI7MWE_Fc