Lightened flywheel

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Bizzer said:
no, I get the reciprocating mass. I just thought the effects would be similar? Wouldn’t actually change hp or torque. Still wrong?
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Your not changing your hard hp or torque output numbers, your changing the way the engine reacts to the spinning inertia, and ultimately the way you observe your vehicle accelerate and handle traction conditions.
 
Polar_Bus said:
Adding FWW (flywheel weight) on mx bikes is a common thing for enduro racers. Ive tried them and like every mod they offer pros and cons. So hear me out before you bash me for an irrelevant post as just take me experiences and reverse everything i say about running a "lightened" FW. Basically adding weight = added spinning inertia which slows down rev speed but adds sustained inertia. Think of it as you are racing across the pavement and suddenly drive into mud. If you have a heavier fw your engine rpms will tend to stay high and not drop. If you have a lightened FW your rpms could drop and you get an engine bog. Lightened FWs will rev out quickly to peak rpms. So in an ideal light load terrain the vehicle with a lighter fw will accelerate quicker than a vehicle with a heavier fw. My opinion is that for a typical basher you will have the best overall performance with a standard fw. If you race, and your looking for very quick off corner acceleration the a lighter fw might help.
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makes sense, if I was to do it, it would be on the baja
 
yeh what kev and ryan said on last page dude,
don't buy a cheapo lightened one, i've seen a few failed ones lightened and not lightened over the years,
never had one fail on me yet though (y) only a matter of time i suppose though :LOL:,
also what ryan said, don't lighten one yerself unless yer confident to do it,
i have a small mill and lathe so can set up properly to do it,
but tbh i wouldnt lighten one for anyone else unless they were certain they wouldnt get all arsey if it did fail,
if i do my own and they fail then its my own problem :ROFLMAO:,
don't just hack away with a saw or dremel, that way only has failure written all over it (y),
 
spents said:
yeh what kev and ryan said on last page dude,
don't buy a cheapo lightened one, i've seen a few failed ones lightened and not lightened over the years,
never had one fail on me yet though (y) only a matter of time i suppose though :LOL:,
also what ryan said, don't lighten one yerself unless yer confident to do it,
i have a small mill and lathe so can set up properly to do it,
but tbh i wouldnt lighten one for anyone else unless they were certain they wouldnt get all arsey if it did fail,
if i do my own and they fail then its my own problem :ROFLMAO:,
don't just hack away with a saw or dremel, that way only has failure written all over it (y),
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lol im better than that 😂 . If i was to id let my dad take it to work (y)
 
Also polar definitely explained it well. In racing the light flywheel shines to get the rpms to ramp up faster where you can catch people in the corners and a heavy flywheel is nice because these little engines need a little help keeping momentum for these heavy rigs. Its a bit of a catch 22 I could definitely see a performance boost in say a boat where all the engine is doing is turning a small prop compared to 4 tires and a rig.
 
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