Running a 125 att max revs
Discussion
A500leroy said:
Super! its a grom related engine.
Just for a balance of opinions...It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
Steve Bass said:
Just for a balance of opinions...
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
EG holding its highest speed possible (61mph in this case) for anything up to 15 miles a time,then varying the throttle to traffic conditions before going again.It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
Its not like im doing high mileage and i guess it will have fresh oil every 1500 miles or so.
A500leroy said:
Steve Bass said:
Just for a balance of opinions...
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
EG holding its highest speed possible (61mph in this case) for anything up to 15 miles a time,then varying the throttle to traffic conditions before going again.It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
Its not like im doing high mileage and i guess it will have fresh oil every 1500 miles or so.
Steve Bass said:
Just for a balance of opinions...
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
Have you seen the million dollar Bogan on YouTube?It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
He rode one across the nullabour and back flat out and generally abused it in between and it was fine.
Steve Bass said:
Just for a balance of opinions...
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
noBest keep bikes as an ornament if riding them will eventually break them.
Donbot said:
Steve Bass said:
Just for a balance of opinions...
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
noBest keep bikes as an ornament if riding them will eventually break them.
No. Riding them isn't a problem, sustained high load or rpm is.
But lets see.....
Steve Bass said:
Donbot said:
Steve Bass said:
Just for a balance of opinions...
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
It'll go pop. Sustained high rpm is never a good thing, especially on engines at the cheaper end of the scale.
If it's an air-cooled motor, heat dissipation can become a problem leading to massively increased wear and eventual failure.
But you need to define "max revs" and how long it'll be flat out for.
But constant high rpm = shortened engine life, simple facts
noBest keep bikes as an ornament if riding them will eventually break them.
No. Riding them isn't a problem, sustained high load or rpm is.
But lets see.....
There’s plenty of 125’s out there that have done thousands of miles without issue. My own did over 30k with loads of sustained high rpm, even the odd over rev and is still going nearly 10 years later according to its MOT history.
Donbot said:
Steve Bass said:
No. Riding them isn't a problem, sustained high load or rpm is.
But lets see.....
Prolonged high rpm and load is simply an acceleration of the wear on an engine. Wear is based not only on frictional issues but stresses induced in the engine in the linear and rotational masses. Add in the effect of oil degradation and heat and it's clear that any prolonged high load or RPM will cause accelerated wear. Whether this wear manifests itself in a gradual degrodation of performance or a sudden catastrophic failure can't be guaranteed but i'm not sure, other than by the anecdotal evidence provided thus far, how you can impirically state that it won't be a problem.
Why do you think manufacturers are now implementing rev limits for running in? Why do Porsche (amongst others) record engine over revs when diagnosing issues? Becuase it has no effect? Really? Go ask any manufacturer what they believe.
So, it may last. it may not. as i said... "let's see"
So no, I'm not arguing for the sake of it, I'm applying known causal factors to a potential issue and extrapolating a potential outcome...So in reflection you must therefore be basing your statements on opinion and ignorance? otherwise, substantiate why it won't be a problem.
But hey, let's not let facts and material science get in the way of an uneducated opinion.
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