Reasons we ride liter bikes-add yours or ones you've heard

[Homeslice]

Originally Posted by TIGGER

You know what's stupid about that?.... A 600 and a 1000 have approximately the same weight and handling characteristics so the same rider can basically enter the same corner at the same speed on either bike...

centrifical mass differences between engine sizes DOES have an effect........regardless of what "teh intranet" says

[Tmall]

Originally Posted by Homeslice

centrifical mass differences between engine sizes DOES have an effect........regardless of what "teh intranet" says

lol I swear I'm not following you around..

I used to think the larger crank and pistons would make for larger centrifugal force to offset, BUT! Litres rev lower. The couple thousand rpm difference may actually make those forces closer than most people think.


I have no hard facts to back this up, just something I was thinking about one day..

[Homeslice]

Originally Posted by Tmall

lol I swear I'm not following you around..

I used to think the larger crank and pistons would make for larger centrifugal force to offset, BUT! Litres rev lower. The couple thousand rpm difference may actually make those forces closer than most people think.


I have no hard facts to back this up, just something I was thinking about one day..

Probably true........

[101lifts2]

Originally Posted by Tmall

lol I swear I'm not following you around..

I used to think the larger crank and pistons would make for larger centrifugal force to offset, BUT! Litres rev lower. The couple thousand rpm difference may actually make those forces closer than most people think.


I have no hard facts to back this up, just something I was thinking about one day..

Engine speed doesn't make it turn slower or faster. It is the weight of the reciprocating mass.

[Tmall]

Originally Posted by 101lifts2

Engine speed doesn't make it turn slower or faster. It is the weight of the reciprocating mass.

Engine speed is directly related to the speed that the internal components are spinning. And the faster you spin it, the stronger the gyroscopic forces are.


Put 50lb weight on the end of a rope and spin it at 50rpm. Now put a 40lb weight and spin it at 100rpm. The 40lb weight WILL have a higher centrifugal, and gyroscopic effect. (same length ropes btw).

[101lifts2]

Originally Posted by Tmall

Engine speed is directly related to the speed that the internal components are spinning. And the faster you spin it, the stronger the gyroscopic forces are.


Put 50lb weight on the end of a rope and spin it at 50rpm. Now put a 40lb weight and spin it at 100rpm. The 40lb weight WILL have a higher centrifugal, and gyroscopic effect. (same length ropes btw).

I understand this, but an engine (other than the crankshaft) continously changes direction up and down. You are not spinning something in one direction. The piston is at 0RPM at the top of the stoke and 0RPM at the bottom of the stroke (regardless of engine speed), though the acceleration is not 0.