Best rev range

[PowerDubs_imp]

Do rpms hurt motorcycles? Ridden within reason NO.

Each engine component has only so many cycles in it (bearings, rings, valves, cam chains, cylinders etc). You can use the cycles up fast or you can use them up slowly.

The average MotoGP race where motorcycles are run at maximum rpms for most of their life is 70 miles long. They run 18 of these races a season plus practice and qualifying. That computes to 1260 miles of racing plus maybe another let's say 4,000 miles in practice and qualifying or approx 5,000 miles total. They are allotted 7 engines to last the season. If high rpms didn't wear out engines, why would they need 7 engines to go 5,000 miles?

I've ridden 68,000 miles on my CB1100 and it still starts and runs great. Is it because it is made with more durable materials? Assembled with more care? Or is it because it has been stressed less and run at fewer rpms? Say 4,000 rpms max vs 18,000 rpm max. I dunno ......

I like to think of engines as hearts. The Chinese used to say that a mouse and an elephant get the same number of heart beats in their lifetime. A mouse at 600 beats per minute uses his up very quickly, while the elephant at 30 beats per minute uses his up very slowly.

Something to think about

Not true- and I can tell you why.

Yes they have 'duty cycles' but how you ride the bike (taking proper warm up time / ease - and correct OCI into account- doesn't matter- and again I will argue an engine run spiritedly (once warm and clean oil) will last LONGER than a 'babied' 'old lady driven' one.

Do rpms hurt motorcycles? Ridden within reason NO.

Each engine component has only so many cycles in it (bearings, rings, valves, cam chains, cylinders etc). You can use the cycles up fast or you can use them up slowly.

The average MotoGP race where motorcycles are run at maximum rpms for most of their life is 70 miles long. They run 18 of these races a season plus practice and qualifying. That computes to 1260 miles of racing plus maybe another let's say 4,000 miles in practice and qualifying or approx 5,000 miles total. They are allotted 7 engines to last the season. If high rpms didn't wear out engines, why would they need 7 engines to go 5,000 miles?

I've ridden 68,000 miles on my CB1100 and it still starts and runs great. Is it because it is made with more durable materials? Assembled with more care? Or is it because it has been stressed less and run at fewer rpms? Say 4,000 rpms max vs 18,000 rpm max. I dunno ......

I like to think of engines as hearts. The Chinese used to say that a mouse and an elephant get the same number of heart beats in their lifetime. A mouse at 600 beats per minute uses his up very quickly, while the elephant at 30 beats per minute uses his up very slowly.

Something to think about

As long as you are in the designed RPM of an engine- you are fine. It isn't the revs of an engine- or even how hard it is ridden (OCI and temp accounted for)- it is simply that the higher an engine is designed for, the smaller / thinner everything is- the pistons, the rings, the rods, the bolts, the valves, EVERYTHING is much much smaller / lighter / less friction- but less life span as revs increase- and on a greatly increasing slope.

Meaning- you couldn't drive a 'race car' or bike easy- lower rev / lower throttle and expect it to have a greatly increased life span- that's not how it works.

Yes WOT // high RPM has more heat- more friction- but as I already said- this is often HELPFUL to the engine. Gunk causes MORE friction, more weight, less sealing, more hot spots, more detonation, etc.

Do rpms hurt motorcycles? Ridden within reason NO.

Each engine component has only so many cycles in it (bearings, rings, valves, cam chains, cylinders etc). You can use the cycles up fast or you can use them up slowly.

The average MotoGP race where motorcycles are run at maximum rpms for most of their life is 70 miles long. They run 18 of these races a season plus practice and qualifying. That computes to 1260 miles of racing plus maybe another let's say 4,000 miles in practice and qualifying or approx 5,000 miles total. They are allotted 7 engines to last the season. If high rpms didn't wear out engines, why would they need 7 engines to go 5,000 miles?

I've ridden 68,000 miles on my CB1100 and it still starts and runs great. Is it because it is made with more durable materials? Assembled with more care? Or is it because it has been stressed less and run at fewer rpms? Say 4,000 rpms max vs 18,000 rpm max. I dunno ......

I like to think of engines as hearts. The Chinese used to say that a mouse and an elephant get the same number of heart beats in their lifetime. A mouse at 600 beats per minute uses his up very quickly, while the elephant at 30 beats per minute uses his up very slowly.

Something to think about

Well- 18,000 is absurd to say since our engine runs half that at best...

but I will tell you that a 68k CB1100 engine ridden to near WOT / near full RPM though a couple gears just a few times a week VS a 68k CB1100 that never gets over say 4k and 1/2 throttle ever- I will bet every single dollar I have eve made and ever will- given similar warm up time and oil change- the bike ridden 'gently' will be WORSE if everything opened up, looked at and measured- by every possible metric- compression test, leak down, ring gap, carbon build up, etc.

Do rpms hurt motorcycles? Ridden within reason NO.

Each engine component has only so many cycles in it (bearings, rings, valves, cam chains, cylinders etc). You can use the cycles up fast or you can use them up slowly.

The average MotoGP race where motorcycles are run at maximum rpms for most of their life is 70 miles long. They run 18 of these races a season plus practice and qualifying. That computes to 1260 miles of racing plus maybe another let's say 4,000 miles in practice and qualifying or approx 5,000 miles total. They are allotted 7 engines to last the season. If high rpms didn't wear out engines, why would they need 7 engines to go 5,000 miles?

I've ridden 68,000 miles on my CB1100 and it still starts and runs great. Is it because it is made with more durable materials? Assembled with more care? Or is it because it has been stressed less and run at fewer rpms? Say 4,000 rpms max vs 18,000 rpm max. I dunno ......

I like to think of engines as hearts. The Chinese used to say that a mouse and an elephant get the same number of heart beats in their lifetime. A mouse at 600 beats per minute uses his up very quickly, while the elephant at 30 beats per minute uses his up very slowly.

Something to think about

To some... yea..